Backend engineer jobs in London - Page 9Create job alerts

You will work closely with backend engineers, UX designers and security stakeholders while taking ownership of the front-end architecture, implementation and delivery quality. We are looking for a Senior Front-End Engineer to lead the development of a greenfield React & TypeScript analytics platform

They are: Core Banking, Business Banking, Wealth, Borrowing, Growth, Payments, Platform, Fincrime, Security & Expansion. We’re waving goodbye to the complicated and confusing ways of traditional banking. As well as personal and business bank accounts, we offer joint accounts, accounts for 16-17 ye

A leading UK bank is seeking a Staff Engineer to join their dynamic team.

Software Engineer (Backend, Python & AWS) – Travtus. Mentor engineers on code quality and platform usage. We’re looking for an enthusiastic engineer with a passion for backend development, collaboration and AI.

You'll develop solutions that impact thousands of frontline workers, working within a cross-functional team and collaborating closely with designers and product managers.

A leading technology firm in London is seeking an experienced software engineer specializing in both frontend and backend development to join their team.The ideal candidate will have a commitment to high standards in user experience, privacy, and security.This role offers flexible working options an

Platform Engineer | Fintech Startup. Experience building and maintaining backend systems, ideally within high-growth or startup environments.

Role: Senior Backend Engineer (Node, TypeScript). Expert knowledge of TypeScript and Node.

Data Migration Engineer Location: Hybrid - 1-2 days a week in London Salary: £70-90k + 10% Bonus Job Type: Permanent Sponsorship: Not Available Role Summary: We are looking for a Data Migration Engineer to help us achieve a multi-system, multi-client, company-wide migration. In this role you will work closely with the owners of our legacy platforms to understand their data, then dive right in and create the queries and processes necessary to move everything to the new. As migration work wraps up, the role will transition to leveraging Airflow and other tooling to automate operational and financial processes. This is a great role for exceptionally outgoing individuals as all work will require extensive collaboration with engineers and stakeholders across many teams. Key Responsibilities: Collaborate with engineers of legacy systems to understand what data is available and the form it takes Design queries & scripts to extract and transform data from the old to the new Collaborate with our Principal Data Engineer to come up with a cold-storage solution for data that will need to persist for regulatory reasons Work with our solutions architect to design the data process' to be run the day each partner is migrated Build and maintain ETLs and workflow automation using Snowflake and Apache Airflow Thoroughly document all learnings and work-in-progress using version control Implement data quality checks and reconciliations at all steps in the process Collaborate with platform/infra teams on security, access controls, and secrets management Required Qualifications: 5+ years of experience in data engineering, analytics engineering, or backend engineering with significant data pipeline ownership Demonstrated past success in a stakeholder management heavy data role Excellent communication skills, able to translate technical knowledge to non-technical colleagues Hands-on experience building and operating production workflows in Apache Airflow Hands-on experience delivering production-grade transformations in dbt, including tests and documentation Strong SQL skills and experience working across multiple SQL dialects. Experience with data modeling and warehousing concepts (facts/dimensions, slowly changing dimensions, incremental loading). Proficiency with Git-based workflows, code reviews, and CI/CD practices. Preferred Qualifications: Have used Azure cloud services previously Experience with streaming/event-driven systems e.g., Kafka/Kinesis Experience with infrastructure as code e.g., Terraform and containerization e.g., Docker/Kubernetes Familiarity with data governance, cataloging, lineage, and privacy/security best practices. Use of SQLServer in a past role. Familiarity with Snowflake and/or PostgreSQL

Senior Full-stack Python Typescript AI Engineer- Outside IR35 ROLE This position is for a Senior Backend Developer working in python and typescript to support the development on a SaaS product with a focus on Ai. This role involves designing, building, and optimising scalable backend services and APIs to support a single-tenant, multi‑instance SaaS platform, while contributing to the architecture and implementation of AI‑driven components such as Retrieval‑Augmented Generation (RAG) pipelines, vector databases, semantic search, and structured or knowledge‑graph‑based data modelling approaches. You will support the design of robust data models and pipelines capable of handling both structured and unstructured data with strong traceability and auditability, and help transition prototypes into production‑ready systems with a focus on security, access control, performance, reliability, observability, and monitoring. The role also includes building and managing integrations with external data sources and APIs, collaborating closely with a small, cross‑functional team of developers and stakeholders to refine requirements and deliver iteratively, and contributing to best practices across development standards, testing, and deployment processes. REQUIREMENTS: Strong experience as a backend or full-stack developer with a backend focus Strong proficiency in key scripts, such as Python and TypeScript Proven experience building production-grade SaaS applications Development experience with AI/LLM system architecture, including: RAG pipelines Vector databases (e.g. Pinecone, Weaviate, FAISS, etc.) experience with relational databases (e.g. PostgreSQL) and data modelling Familiarity with API design and integration (REST or GraphQL) experience working with cloud environments (e.g. AWS, Azure, GCP) Job Title: Senior Full-stack Python Typescript AI Engineer Location: London, UK Job Type: Contract Trading as TEKsystems. Allegis Group Limited, Maxis 2, Western Road, Bracknell, RG12 1RT, United Kingdom. No. (phone number removed). Allegis Group Limited operates as an Employment Business and Employment Agency as set out in the Conduct of Employment Agencies and Employment Businesses Regulations 2003. TEKsystems is a company within the Allegis Group network of companies (collectively referred to as "Allegis Group"). Aerotek, Aston Carter, EASi, Talentis Solutions, TEKsystems, Stamford Consultants and The Stamford Group are Allegis Group brands. If you apply, your personal data will be processed as described in the Allegis Group Online Privacy Notice available at (url removed)> To access our Online Privacy Notice, which explains what information we may collect, use, share, and store about you, and describes your rights and choices about this, please go to (url removed)> We are part of a global network of companies and as a result, the personal data you provide will be shared within Allegis Group and transferred and processed outside the UK, Switzerland and European Economic Area subject to the protections described in the Allegis Group Online Privacy Notice. We store personal data in the UK, EEA, Switzerland and the USA. If you would like to exercise your privacy rights, please visit the "Contacting Us" section of our Online Privacy Notice at (url removed)/en-gb/privacy-notices for details on how to contact us. To protect your privacy and security, we may take steps to verify your identity, such as a password and user ID if there is an account associated with your request, or identifying information such as your address or date of birth, before proceeding with your request. If you are resident in the UK, EEA or Switzerland, we will process any access request you make in accordance with our commitments under the UK Data Protection Act, EU-U.S. Privacy Shield or the Swiss-U.S. Privacy Shield

QA Engineer (Manual Testing) Remote £55,000 - £70,000 DOE + Private Healthcare & Benefits This is an excellent opportunity for a QA Engineer to take ownership of the manual testing lifecycle for a B2B SaaS platform. If you thrive in environments where your work has a direct impact on accessibility and social mobility, this role offers the chance to lead release confidence across global web and mobile applications. This company is a Series A startup, breaking down barriers and making the world more accessible for everyone. Originally founded within the UK transport sector, they have developed award-winning, innovative solutions that prioritise dignity, safety, and inclusion for millions of users. In this varied role, you will move between established legacy projects and fast-moving greenfield expansions, ensuring that the data syncs perfectly between a Ruby on Rails backend and native iOS/Android client devices. You will embed yourself in the design phase to strengthen acceptance criteria before code is even written. The ideal candidate will be a process-driven QA professional with a deep understanding of web and mobile, such as offline modes and location services. You should be comfortable navigating a technical stack (Vue.js, Ruby, Swift, Kotlin) and have a proven track record of using tools like TestRail or Jira to bring clarity and structure to regression testing. This is a fantastic opportunity to join a purpose-led business during a period of international scaling. You will have the autonomy to decide what requires a manual pass and what should be handed to SDETs for automation, ultimately serving as the final gatekeeper for releases that millions will rely on. The Role: Lead the end-to-end testing lifecycle for web and mobile applications. Act as the final partner for Engineering, conducting rigorous smoke tests and regression passes to ensure high reliability. Maintain and expand the TestRail repository. Participate in design sessions to clarify acceptance criteria before a single line of code is written.The Person: Strong experience in manual QA for web and mobile, with the ability to navigate Ruby on Rails and Vue.js. Deep proficiency in native iOS (Swift) and Android (Kotlin) testing, including location services and offline mode constraints. A proven track record of improving QA workflows and using tools like TestRail and Jira for release. Experience testing SaaS platforms with complex user permissions, ideally within the Transport, Logistics, or Government sectors. Reference Number: BBBH(phone number removed) Rise Technical Recruitment Ltd acts an employment agency for permanent roles and an employment business for temporary roles. The salary advertised is the bracket available for this position. The actual salary paid will be dependent on your level of experience, qualifications and skill set and will be decided by our client, the employer. Rise are not responsible or liable for any hiring decisions made by the end client. We are an equal opportunities company and welcome applications from all suitable candidates

Contract Lead Ruby Developer– (UK Remote) 100% Remote (EU-Based Candidates Only) ⏳ 12-Month Contract We are supporting a leading organisation in the insurance sector as they scale and modernise their cloud‑based core platform. They are looking for an experienced Senior Ruby Engineer to join on a 12‑month contract, working fully remotely from anywhere within the UK. Role Overview You’ll be a senior member of an engineering squad building, enhancing, and optimising a modern cloud-native system used across a major insurance operation. This is a hands‑on development role where you’ll contribute to new features, performance improvements, integrations, and architectural evolution within a high‑performing engineering culture. What You’ll Be Working On Developing and maintaining backend services using Ruby / Ruby on Rails Building scalable, maintainable components within a cloud-native architecture Collaborating with product, cloud, and DevOps teams to deliver high‑impact functionality Contributing to technical decisions, best practices, and code quality improvements Integrating third-party services and APIs within a complex insurance environment Supporting ongoing migration, modernisation, and cloud optimisation initiatives What We’re Looking For Strong commercial experience as a Senior Ruby or Ruby on Rails Engineer Deep understanding of distributed systems and cloud-based application design Extensive hands‑on experience with AWS Solid background in building scalable APIs, microservices, and backend systems Familiarity with CI/CD pipelines, DevOps tooling, and modern cloud workflows Excellent communication skills and ability to operate within a cross-functional, remote team Must be based within the UK for compliance and time zone alignment ✨ Nice to Have Experience in insurance, financial services, or other regulated industries Exposure to containerisation (Docker/Kubernetes) Knowledge of security best practices in cloud environments

Contract Node.js & React Engineer 6‑month contract (extensions likely) £400 per day – Inside IR35 60% Hybrid – Newcastle, London, Leeds or Blackpool Opus is working with a leading consultancy delivering high‑impact services for a UK Government department. We’re looking for a Node.js & React Engineer with Nunjucks experience to help build and evolve accessible, high‑volume digital systems. What You’ll Be Doing Building user‑facing features using React & TypeScript Developing server‑side functionality with Node.js Working with Nunjucks templating for government service patterns Supporting high‑traffic, transactional systems Writing clean, test‑driven code (TDD / Jest) Improving CI/CD pipelines and development automation Contributing to ever‑greening and modernisation Ensuring WCAG‑compliant accessibility Collaborating across multiple agile delivery teams✅ Required Experience Strong JavaScript experience (frontend & backend) React with modern frontend practices Node.js Nunjucks templating experience TypeScript TDD and automated testing CI/CD tooling (GitLab CI, Jenkins or GitHub Actions) Experience delivering large‑scale digital services⭐ Nice to Have CASA or (url removed) Design System experience SQL / NoSQL databases Redis or similar caching tools API & microservices integration Cloud platforms (AWS or Azure) Docker / containerisation exposure SC eligibility (not mandatory) Apply now or get in touch to discuss suitability and team fit

Senior Backend Engineer (Platform & Cloud) Location: London (Hybrid) Contract: 6–12 months Rate: Negotiable (DOE) We’re working with a global enterprise organisation that is expanding a centralised engineering function supporting multiple product teams across an international portfolio. They’re looking for a Senior Backend Engineer to join a core platform team responsible for building shared services, libraries, and cloud-based functionality used across a wide range of internal products. This is a highly collaborative role, working directly with senior engineers and technical leaders across multiple time zones, helping shape the foundations of how teams build, scale, and reuse backend capability. The Role You’ll be part of a central engineering group building common functionality for distributed product teams. Early work will focus on: Abstracting existing codebases into shared Python libraries Developing data-driven solutions using PySpark and DataFrames Building and extending Python-based microservices using Azure Functions Creating scalable, reusable services that solve common challenges across teamsBeyond the initial phase, you’ll act as an extension of the product teams — designing and delivering new services, libraries, and architectural patterns to support platform growth. Strong communication is essential, as you’ll be working closely with engineers and technical leads across five time zones. Essential skills Strong commercial experience with Python PySpark and data-frame based processing Solid SQL capability Experience working with Azure infrastructure Good understanding of containers, microservices, and functional design patterns Comfortable working in Agile environments Experience using Terraform for infrastructure as code Strong approach to unit testing (ideally with PyTest)Nice to have FastAPI React / TypeScript HTML / CSSWhy this role? Work on a central platform team with genuine architectural influence Build solutions that are used across multiple products and regions Long-term contract with strong extension potential Hybrid working in London High-impact role in a complex, enterprise-scale environmentIf you’re a backend engineer who enjoys building platforms, shared services, and scalable cloud solutions — this is an amazing opportunity for you! Interested? Please apply now with your updated CV and reach out to Tom Johnson at Certain Advantage - Ref: 79927

Senior Full Stack Engineer (Java / Python) Contract Length - 6 months Location - London (2 days onsite) We are hiring a Senior Full Stack Engineer for a high-priority, ASAP-start contract role with a leading UK tech platform. This is a hands-on senior engineering position within an established team building scalable, modern full stack systems. The Role You'll be a senior individual contributor working across backend and frontend systems, helping shape technical direction and confidently engaging with stakeholders to influence engineering decisions. The core stack is Java-first, with increasing importance on Python-based services (including orchestration, agents, and modern AI/LLM integrations), alongside a strong React frontend. This is not a leadership/management role, but you must be able to operate at senior level, challenge decisions, and drive engineering quality. What you'll bring We're looking for a strong Full Stack Engineer with recent commercial experience across: Java + Spring Boot (core requirement, must be recent - ideally last 12-24 months) Python (recent hands-on experience essential - services, orchestration, or AI/LLM work highly valued) React (strong frontend experience is critical) Experience building and delivering end-to-end full stack applications (frontend, backend, APIs) Plus exposure to: Cloud platforms (AWS preferred; Azure/GCP also fine) Containers (Docker, Kubernetes - Kubernetes preferred) Data systems (Postgres / NoSQL; bonus for vector DBs, embeddings, semantic search) Agile delivery environments Engineering best practices (TDD, SOLID, XP principles) Other Key Skills Strong communication skills and stakeholder management Ability to challenge technical decisions constructively Senior-level ownership and accountability (IC role, not managerial) Reliable, collaborative, and comfortable in fast-moving environments ?? Important notes Must have recent Java AND Python experience (last 1-2 years ideal) Frontend (React) experience is essential - full stack capability required Candidates must be comfortable working onsite in London twice per week (Soho) Please note - candidates must have full right to work in the UK. This is a fast moving requirement, and we are prioritising candidates who are immediately available or on short notice. TPBN1_UKTJ

This job is with BBC, an inclusive employer and a member of myGwork – the largest global platform for the LGBTQ+ business community. Please do not contact the recruiter directly. JOB DETAILS JOB BAND: C CONTRACT TYPE: Permanent, Full-time DEPARTMENT: Engineering LOCATION: London - TVC PROPOSED SALARY RANGE: £44,869 - £58,000 depending on relevant skills, knowledge and experience. Plus London Weighting Allowance of £5,441. The expected salary range for this role reflects internal benchmarking and external market insights. We're happy to discuss flexible working. If you'd like to, please indicate your preference in the application - though there's no obligation to do so now. Flexible working will be part of the discussion at offer stage. WE ARE BBC STUDIOS A globally renowned media company borne of the BBC. We make and distribute the world's most sought-after TV, audio and digital content. Our ambition is to be the home of the most powerful, entertaining, and inspiring stories for people all around the world. PURPOSE OF THE ROLE As a Mobile App Engineer, you'll be a key contributor to an empowered product engineering team, combining world-class software craftsmanship with pragmatic problem-solving. You'll help design, build, and maintain scalable systems using React Native & modern TypeScript, assist with technical decisions while delivering meaningful outcomes at pace. WHY JOIN THE TEAM This role sits within the bbc.com worldwide team, focused on delivering solutions and content for our global (non-UK) audience. The platform is supported by three teams: front-end, CMS/tooling, and back-end systems. We're currently undergoing a transformation to strengthen our agile and engineering practices, with a constant drive to improve. The team is known for being friendly, open, and supportive. bbc.com is part of the wider Studios Product Group, which manages major BBC brands and content distribution. YOUR KEY RESPONSIBILITIES AND IMPACT: Writing high quality, well-tested, production-grade code that meets reliability, security, and performance standards. Assist developers within team with maintaining system health and ensuring technical best practices. Contribute to architectural decisions, ensuring systems are scalable, observable, and aligned to business needs. Participate in planning, estimation, and technical discovery sessions. Support the growth of engineers through code reviews, pairing, and knowledge sharing. Assist with enforcing engineering standards, and help shape a healthy, inclusive team culture. YOUR SKILLS AND EXPERIENCE ESSENTIAL CRITERIA: Strong Experience in React Native and contributing to production-grade systems. Strong TypeScript knowledge and practices in mobile codebases. Good testing skills utilising Jest/React Testing Library. Experience working with native tooling: Xcode & Android Studio. Experience with component/UI library tools such as Storybook. Experience with Detox or other relevant e2e testing framework DESIRED BUT NOT REQUIRED: Familiarity with CI/CD methodologies / GitHub actions. Experience of automation frameworks/tools i.e Fastlane. Knowledge of methodologies such as TDD / Mutation testing. Experience with building native React Native modules using Swift and Kotlin. Experience with API design and working with Backend teams and understanding of concepts such as versioning, validation and shaping data endpoints. If you can bring some of these skills and experience, along with transferable strengths, we'd love to hear from you and encourage you to apply NEXT STEPS We appreciate your interest in this position and understand how important this opportunity is to you. Due to the high volume of interest we may need to close the application period earlier than anticipated. This step is necessary to ensure we can provide a high level of attention and service to all applicants. Thank you for your understanding. #BBCSTUDIOS ]]>

GenAI Full Stack Engineer - Managing Consultant Salary: £77,000 - £88,000 pa + £8,000 Bonus plus benefits, perks and healthcare options Job Type: Permanent - Hybrid / 2 x days per week - Travel to client site Base Locations: London, Manchester, Newcastle, Glasgow Overview: We're looking for a GenAI Full Stack Engineer who is passionate about solving real-world challenges through technology. You'll work closely with senior stakeholders both internally and within key clients to create GenAI strategies that translate business issues into relevant technical solutions and competitive propositions that are scalable, secure, and sustainable. Your Role: Collaborate with the team to develop GenAI proof-of-concepts (POCs) for clients using technologies like Retrieval-Augmented Generation (RAG) and intelligent agents. Scale existing POCs to production-ready solutions for customer use. Design and develop Full Stack applications for both GenAI and non-GenAI projects. Support the development of infrastructure to enable robust end-to-end solutions. Grow your skills by exploring and experimenting with emerging technologies, including GenAI. Your skills and experience: Backend Development: Experience in building microservices using either Python with FastAPI, or TypeScript with Express or equivalent Frontend Development: Experience in building React applications using TypeScript, leveraging frameworks such as Next.js or Vite. GenAI Frameworks: Familiarity with tools like LangChain, LangGraph, CrewAI, or Vercel AI (in Python or JavaScript). LLM experience: Practical experience with Large Language Models (LLMs) such as OpenAI, Anthropic, Mistral, or Llama, and tools like Ollama. Cloud Platforms: Proficiency in AWS or Azure for hosting and deployment. Containerization and Orchestration: Hands-on experience with Docker, Kubernetes, and Docker Compose. Infrastructure as Code (IaC): Exposure to tools like Terraform. Monitoring Tools: Familiarity with LLM monitoring tools like Langsmith, Langfuse, or similar. CI/CD: Experience with continuous integration and deployment tools such as GitLab, GitHub, or Jenkins. Vector Databases: Experience with and (but not limited to) ChromaDB, Pinecone, PGVector, MongoDB , Qdrant etc. NoSQL: Familiarity with NoSQL databases (e.g., MongoDB preferred). SQL: Experience working with SQL databases like PostgreSQL. Proficient in Git and version control platforms like GitHub, GitLab, etc. To be successfully appointed to this role, it is a requirement to obtain Security Check (SC) clearance

Application Software Engineer – JavaScript A fantastic opportunity for talented Software Developers, to join an industry-leading software company in either London or Cambridge offering the opportunity to work on a wide variety of web application infrastructure projects using a diverse toolset, with an emphasis on JavaScript, Node.js and related frameworks. Location: London or Cambridge (3 days on site, 2 days remote) Salary: Negotiable + comprehensive benefits Requirements for Application Software Engineer: History of academic excellence including a 2:1 or 1st class honours degree from a leading university plus AAB at A Level (or equivalent UCAS points) Solid commercial experience using JavaScript and ideally, node.js and related technologies/frameworks - top new graduates considered for the Cambridge office You class yourself as a tech innovator and the idea of shaping products and suggesting new technologies really appeals Ability to quickly pick up new technologies – working in JavaScript you’re aware new technologies/frameworks emerge all of the time, and you will need to stay abreast of the latest and best technologies to apply to any given project Good communication skills Responsibilities for Application Software Engineer: Work on web applications using a diverse toolset based around JavaScript technologies. While there will be opportunities to work across the stack. The current tech stack includes: Web (UI): JavaScript (backbone.js, d3.js, three.js, pdf.js), Less/CSS Web (Backend): Node.js, PostgreSQL, Elasticsearch, Redis Develop, deploy and maintain web application infrastructure Be a tech innovator and put ideas forward to the team If you are keen there is the opportunity to mentor junior members of staff What the role offers: The chance to work on a diverse toolset of cutting-edge tech Working for a leading software company who have a fantastic track record of successfully training and promoting internally A great remuneration and benefits package Applications: If you would like to apply for this unique Developer role then please send your CV via the relevant links! We’re committed to creating an inclusive and accessible recruitment process. If you require reasonable adjustments for your application or during the review process, please highlight this by emailing (if this email address has been removed by the job-board, full details for contact are available on our website). Keywords: Software Engineer / Application Developer / Back-End Software Engineer / node.js developer / node.js Software Engineer / Full-Stack Developer / UI/UX Developer / JavaScript Developer / Vue.js Developer / MEAN Stack Developer / MERN Stack Developer / Meteor.js Developer / Express.js Developer / Web Design Engineer / Web Integration Developer / Web Architect / Software Engineer (Web) / Web Systems Developer/ Web Software Engineer / Web Programmer / JavaScript / Node.js / backbone.js / HTML5 / Less CSS / Computer Science / Web Development / Web Software Engineer / PHP Astrophysics / Software Engineering / JavaScript / React.js / AngularJS / Vue.js / Node.js / ExpressJS / Web UI / Front-end / full-stack / back-end / Developer RedTech Recruitment Ltd focus on finding roles for Engineers and Scientists. Even if the above role isn’t of interest, please visit our website to see our other opportunities. We are an equal opportunity employer and value diversity at RedTech. We do not discriminate on the basis of race, religion, colour, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status

Mobile Engineer (Kotlin Multiplatform) Location: Onsite / Hybrid (London) Our client is on a mission to change people's lives for the better through wellness. They are transforming into a social wellness organisation, empowering people to improve their physical, mental, social, and nutritional wellbeing through exceptional, holistic experiences. They are creating a luxury, inclusive, wellness environment, blending cutting edge tech with meaningful human experiences. As part of this future, they're consolidating their global mobile app ecosystem and have a need for several Mobile Engineers to help lead the way. This is a rare chance to join a growing central engineering function building a globally scalable mobile platform across multiple countries. As a Senior Mobile Engineer, you'll take ownership of complex technical areas, deliver high-impact features, and establish best practices across a Kotlin Multiplatform (KMP) ecosystem. You'll work cross-functionally with Engineering Leads, Product, Design, QA, and Backend teams to build outstanding mobile experiences for millions of users across Android and iOS. Experience Experienced software engineering experience, with strong mobile focus. Lead the design, build, and delivery of complex mobile features using Kotlin Multiplatform. Influence sprint planning, estimation, and technical direction for larger delivery areas. Champion clean architecture, maintainable code, and robust testing practices. Conduct high-quality code reviews and elevate engineering standards across the team. Drive end-to-end delivery: design → build → test → release → support. Partner with backend teams to ensure robust, scalable integrations. Improve app reliability, performance, observability, and maintainability. Enhance CI/CD tooling, automation, and release processes. Lead investigations into complex production issues and implement preventive solutions. Collaborate with Product and Design on technical solutions and feasibility. Contribute to and produce strong documentation, improving team knowledge sharing. Hands-on expertise with cross-platform/shared codebases - ideally Kotlin Multiplatform. Strong understanding of mobile architecture, modularisation, and design patterns. Excellent experience integrating mobile apps with backend APIs and services. Strong experience with unit testing and automated testing approaches. Proficient with Git, code review culture, and collaborative engineering workflows. Strong debugging, problem-solving, and communication skills. Direct experience delivering shared KMP modules for both Android & iOS. Experience with CI/CD pipelines, release management, crash analytics & monitoring. Background in consumer apps, subscription products, lifestyle/wellness platforms. This is a permanent role based in central London with a requirement of 2-3 days in the office. Salary range is dependent on experience as we are hiring for different levels. Please note you will receive an automated response advising you that we have received your CV. Morgan Philips Group is a global talent solutions business that disrupts conventional thinking in executive search, recruitment and talent consulting. We operate in over 18 markets in Europe, North & South America, Asia, and the Middle East & Africa. We understand that the future is digital and social, so we embrace the latest technology, including video ads and CVs, as well as social recruiting. Our innovative services are tailored to the new world of work yet we do not lose sight of the fact that employees be they existing and potential are ultimately human beings. We are committed to ensuring that all job applicants are treated equally, without discrimination because of gender, sexual orientation, marital or civil partner status, gender reassignment, race, colour, nationality, ethnic or national origin, religion or belief, disability or age

The Company This business is a rail software and consulting company with a growing team and a solid foundation of project-based revenue. It works with leading organisations across the UK rail industry, helping them harness data to solve complex operational challenges. Data Engineers are key to this mission - building robust data infrastructure and tooling that powers insights, analytics, and software products used across the rail network. The Role As a Data Engineer, you'll be part of a collaborative technical team, working across the data lifecycle: from designing ETL pipelines and integrating real-time data streams, to developing APIs and backend systems that deliver rail data securely and reliably. You'll work closely with engineers, consultants, and project managers to translate real-world rail problems into scalable technical solutions. This role sits at the intersection of software engineering, data architecture, and delivery. Key Responsibilities Data Engineering & Infrastructure • Design and implement robust data pipelines (batch and real-time) for ingesting, transforming, and serving rail-related datasets. • Develop and maintain data APIs and services to support analytics, software features, and reporting tools. • Build data models and storage solutions that balance performance, cost, and scalability. • Contribute to codebases using modern data stack technologies and cloud platforms (e.g., Azure, AWS). Collaborative Delivery • Work with domain consultants and delivery leads to understand client needs and define data solutions. • Participate in agile delivery practices, including sprint planning, reviews, and retrospectives. • Help shape end-to-end solutions — from ingestion and transformation to client-facing features and reporting. Best Practices & Growth • Write clean, well-documented, and tested code following engineering standards. • Participate in design reviews, code reviews, and collaborative development sessions. • Stay up-to-date with new tools and trends in the data engineering space. • Contribute to internal learning sessions, tech talks, and shared documentation. The Candidate You might be a good fit if you have experience with: • Building ETL/ELT pipelines using tools like Kafka, dbt, or custom frameworks. • Working with structured and unstructured data at scale. • Backend development in Python (or similar), and familiarity with data APIs. • Cloud data platforms (e.g., AWS Redshift, Azure Synapse). • SQL and database design for analytics, reporting, and product use. • Agile collaboration with cross-functional teams. You don’t need experience in rail — just curiosity and a willingness to learn the domain

Lead GO Engineer Our client, a digital SaaS provider backed by the government is hiring a Lead GO Engineer to join a fast-scaling, purpose-driven SaaS organisation delivering impactful digital services. You will lead on several greenfield projects as the client continues to scale & transform. Our client has a fantastic ethos, focussed on aiding & helping people improve their lives. Our client is offering a fully remote contract & benefits (30 days holiday, 6% pension & health care) paying up to £75,000 to start ASAP. In this role, you will design, develop, and optimise scalable, secure, cloud-based systems using Go (Golang), PostgreSQL, Redis, RabbitMQ, and Docker. You will contribute to architecture discussions, collaborate with cross-functional teams, and help ensure the delivery of reliable, high-quality features. This is an excellent opportunity for an engineer who has proven experience in a previous Lead or Management position as you must be able to demonstrate the capabilites to steer projects & provide coaching. Role and Responsibilities: Design, develop, and maintain backend services using Go (Golang) Build and manage messaging patterns and asynchronous workflows with Redis and RabbitMQ Develop efficient, scalable database schemas and queries in PostgreSQL Build clean, well-documented RESTful APIs and service integrations Contribute to containerised environments using Docker and maintain cloud-native services on AWS Participate in architecture discussions, CI/CD pipelines, and quality assurance processes Mentor peers, share knowledge, and promote best practices in backend developmentSkills and Experience: Solid experience in backend development roles Strong proficiency in Go (Golang), including concurrency models and thread-safe coding Proven experience with Redis (caching & Pub/Sub) and RabbitMQ (messaging) Strong experience with PostgreSQL and libraries such as sqlx and gorm Solid understanding of Docker and containerised development Experience building RESTful APIs and integrating services Desirable: AWS services (Lambda, EventBridge, SQS), microservices architecture, CI/CD tooling, event-driven systems

We're looking for a Senior Software Engineer to join a growing team building smart, scalable tools used by professionals across a range of industries. You'll work onsite in London, helping shape robust backend services and responsive user experiences using React, NextJS and NodeJS. What You'll Do Build and maintain scalable, secure applications, modern architectural patterns Write clean, test-driven code with a focus on performance and usability Collaborate across teams to deliver iterative improvements Lead on innovation and continuous delivery best practices Support and mentor others while staying hands-on with the techWhat We're Looking For Proven experience working with React Strong understanding of microservices, CI/CD, and DevOps practices Confident writing performant frontend code Agile mindset with excellent communication skills Enthusiastic about solving problems and sharing knowledgeNice to Have: Experience with Drupal 7 Familiarity with serverless architectures, quality engineering, or modern frontend frameworks INDLON 49904NBR1 The Portfolio Group are acting on behalf of our client in recruiting for this position

This job is with State Street, an inclusive employer and a member of myGwork – the largest global platform for the LGBTQ+ business community. Please do not contact the recruiter directly. Role Summary : We are seeking an experienced QA Automation Engineer to join our Digital Asset development team. This is a hands‑on, quality engineering role responsible for designing, building, and maintaining automated test frameworks and test suites for mission‑critical digital asset platforms within a regulated financial services environment. You will work closely with cross-functional teams to build robust, scalable, and secure digital asset products that meet our business and technical requirements. Role Description : Design, develop, and maintain automated test frameworks for digital asset platforms, with a strong focus on API and backend testing Create and execute automated test suites covering digital asset workflows, including custody events, token lifecycle actions, transfers, settlements, and reporting Validate data integrity and reconciliation across digital and traditional systems, ensuring consistency between on‑chain/off‑chain records and downstream financial systems Collaborate closely with developers and product teams, contributing to testability, acceptance criteria, and automation‑ready designs Build and maintain integration and regression test coverage for microservices‑based platforms deployed in containerized environments Support non‑functional testing relevant to financial services, including performance, resilience, and negative/error scenarios Participate in defect triage and root‑cause analysis, working with engineering teams to identify issues and prevent recurrence Ensure testing approaches align with enterprise SDLC, risk, and compliance expectations, including evidence capture for audits and control reviews Core/Must have skills : Proven experience as a QA Automation Engineer within financial services or other regulated environments Strong hands‑on experience with test automation for APIs and backend services (e.g. REST APIs, service‑to‑service integrations) Solid understanding of QA practices across the full SDLC, including Agile delivery models and automation‑first testing strategies Experience validating data accuracy, integrity, and consistency, particularly in systems handling financial or transactional data Strong analytical skills, attention to detail, and the ability to collaborate effectively with developers and product stakeholders Good to have skills : Working knowledge of digital asset concepts, such as custody, tokenization, wallets, or blockchain‑based transaction flows Experience testing digital asset or blockchain‑adjacent platforms, including on‑chain/off‑chain integration points Exposure to event‑driven or streaming architectures used for digital asset data distribution and reporting Familiarity with containerized or microservices‑based platforms, and testing services deployed in Kubernetes environments Experience with performance and resilience testing for APIs supporting high‑value or time‑sensitive transactions Understanding of risk, controls, and audit requirements in financial services technology. About State Street Across the globe, institutional investors rely on us to help them manage risk, respond to challenges, and drive performance and profitability. We keep our clients at the heart of everything we do, and smart, engaged employees are essential to our continued success. We are committed to fostering an environment where every employee feels valued and empowered to reach their full potential. As an essential partner in our shared success, you'll benefit from inclusive development opportunities, flexible work-life support, paid volunteer days, and vibrant employee networks that keep you connected to what matters most. Join us in shaping the future. As an Equal Opportunity Employer, we consider all qualified applicants for all positions without regard to race, creed, color, religion, national origin, ancestry, ethnicity, age, disability, genetic information, sex, sexual orientation, gender identity or expression, citizenship, marital status, domestic partnership or civil union status, familial status, military and veteran status, and other characteristics protected by applicable law. Discover more information on jobs at StateStreet.com/careers Read our CEO Statement ]]>

Tank have been engaged by a client to recruit a Contract Senior Go / Golang Engineer to support the delivery of advanced, production-grade systems. 12+ Month Contract Hybrid working - London Key Skills: Proven experience building backend or network-facing services using Go Strong Python skills, ideally within machine learning or computer vision environments Familiarity with frameworks such as PyTorch or TensorFlow (or a willingness to learn) Experience with containerisation and orchestration tools such as Docker or Kubernetes Comfortable working in Linux-based environments Solid understanding of version control best practices (e.g. Git) If this opportunity is of interest, please apply or get in touch for more details

Senior Data Engineer (Payments & FinTech) Location: Hybrid - 1-2 days a week in London Salary: £80-90k + 10% Bonus Job Type: Permanent Sponsorship: Not Available Role Summary: We are looking for a Senior Data Engineer to support a multi-system, multi-client, company-wide migration. In this role, you will work closely with owners of legacy platforms to understand their data, then design and build the queries and processes required to migrate it into a new environment. As migration work concludes, the role will transition into leveraging Airflow and other tooling to automate operational and financial processes. This position requires a highly collaborative individual, as you will work closely with engineers and stakeholders across multiple teams. Key Responsibilities: Collaborate with engineers across legacy systems to understand available data and its structure. Design queries and scripts to extract, transform, and migrate data into new platforms. Partner with senior data leadership to define cold-storage solutions for regulatory data retention. Work with solution architects to design migration-day data processes for partner onboarding. Build and maintain ETL pipelines and workflow automation using Snowflake and Apache Airflow. Document processes, learnings, and development work using version control best practices. Implement robust data quality checks and reconciliation processes throughout pipelines. Collaborate with platform and infrastructure teams on security, access control, and secrets management. Required Qualifications: 5+ years' experience in data engineering, analytics engineering, or backend engineering with strong ownership of data pipelines. Proven experience in stakeholder-heavy environments, working cross-functionally. Strong communication skills, with the ability to translate technical concepts to non-technical audiences. Hands-on experience building and managing production workflows in Apache Airflow. Experience delivering production-grade transformations in dbt, including testing and documentation. Advanced SQL skills across multiple dialects. Strong understanding of data modelling and warehousing concepts (e.g., fact/dimension models, SCDs, incremental loads). Experience with Git-based workflows, code reviews, and CI/CD practices. Preferred Qualifications: Experience with Azure cloud services. Exposure to streaming or event-driven architectures (e.g., Kafka, Kinesis). Experience with infrastructure as code (e.g., Terraform) and containerisation (e.g., Docker, Kubernetes). Understanding of data governance, lineage, cataloguing, and security best practices. Previous experience working with SQL Server. Familiarity with Snowflake and/or PostgreSQL. Proactive, self-starter mindset with a strong "go-getter" attitude Excellent communication skills, able to engage and influence both technical and non-technical stakeholders Strong investigative and problem-solving abilities, with a hands-on approach to uncovering and understanding complex data landscapes Comfortable working across multiple legacy platforms, collaborating closely with engineering teams Ability to design and shape effective data migration strategies through cross-functional collaboration

This job is with BBC, an inclusive employer and a member of myGwork – the largest global platform for the LGBTQ+ business community. Please do not contact the recruiter directly. JOB DETAILS JOB BAND: D CONTRACT TYPE: Permanent, Full-time DEPARTMENT: Engineering PROPOSED SALARY RANGE: £61,000 - £76,725 depending on relevant skills, knowledge and experience. Plus London Weighting Allowance of £5,441. The expected salary range for this role reflects internal benchmarking and external market insights. We're happy to discuss flexible working. If you'd like to, please indicate your preference in the application - though there's no obligation to do so now. Flexible working will be part of the discussion at offer stage. WE ARE BBC STUDIOS A globally renowned media company borne of the BBC. We make and distribute the world's most sought-after TV, audio and digital content. Our ambition is to be the home of the most powerful, entertaining, and inspiring stories for people all around the world. PURPOSE OF THE ROLE As a Senior Mobile App Engineer, you'll be a key contributor to an empowered product engineering team, combining world-class software craftsmanship with pragmatic problem-solving. You'll design, build, and maintain scalable systems using React Native & modern TypeScript, helping shape technical decisions while delivering meaningful outcomes at pace. WHY JOIN THE TEAM This role sits within the bbc.com worldwide team, focused on delivering solutions and content for our global (non-UK) audience. The platform is supported by three teams: front-end, CMS/tooling, and back-end systems. We're currently undergoing a transformation to strengthen our agile and engineering practices, with a constant drive to improve. The team is known for being friendly, open, and supportive. bbc.com is part of the wider Studios Product Group, which manages major BBC brands and content distribution. YOUR KEY RESPONSIBILITIES AND IMPACT: Writing high quality, well-tested, production-grade code that meets reliability, security, and performance standards. Lead by example on code quality, refactoring, and technical best practices. Orchestrate and lead on architectural decisions, ensuring systems are scalable, observable, and aligned to business needs. Participate in planning, estimation, and technical discovery sessions. Support the growth of engineers through code reviews, pairing, and knowledge sharing and mentoring Promote and shape engineering standards, continuous improvement, and a healthy, inclusive team culture. Evaluating and implementing new technologies and tools to improve efficiency and system health. YOUR SKILLS AND EXPERIENCE ESSENTIAL CRITERIA: Expertise in React Native and building production-grade systems Excellent TypeScript knowledge and practices in mobile codebases Good testing skills utilising Jest/React Testing Library as well knowledge of methodologies such as TDD / Mutation testing etc Strong expertise in native tooling: Xcode & Android Studio Experience with component/UI library tools such as Storybook Experience and knowledge of automation frameworks/tools such as Fastlane Good familiarity with CI/CD best practices / GitHub actions Experience with Detox or other relevant e2e testing framework Experience/understanding of API design and working with Backend teams to promote concepts such as versioning, validation and shaping data endpoints. DESIRED BUT NOT REQUIRED: Experience with building native React Native modules using Swift and Kotlin. If you can bring some of these skills and experience, along with transferable strengths, we'd love to hear from you and encourage you to apply. NEXT STEPS We appreciate your interest in this position and understand how important this opportunity is to you. Due to the high volume of interest we may need to close the application period earlier than anticipated. This step is necessary to ensure we can provide a high level of attention and service to all applicants. Thank you for your understanding. #BBCSTUDIOS ]]>

Mobile Engineer / Developer (KMP Kotlin Multiplatform iOS Android Native) London / WFH to £75k Are you a technologist Mobile Engineer with KMP development experience? You could be progressing your career in a hands-on Mobile Engineer role at a hugely successful, global health / wellness company. As a Mobile Engineer you'll join a team acting as a tech incubator within the wider business who are enabling the business to transform from fitness through to a lifestyle and wellbeing experience, via the customer facing member engagement platform. You'll design, develop, build and evolve the mobile application services, building shared KMP modules and platform-specific implementations across Android and iOS. You'll work on business logic, networking, domain layers and API integrations, collaborating closely with backend engineers, product, design and QA to deliver end-to-end features. Location / WFH: You'll join a friendly, diverse team based in the London office three days a week with flexibility to work from home twice a week in a hybrid model. About you: You have strong mobile application development experience You have experience with Kotlin Multiplatform (KMP) for Android and iOS native development You have API integration experience You've worked on complex applications with large user bases You have end-to-end mobile feature development experience You're keen to work in start-up type environment where you can contribute and get stuff done You're collaborative with great communication skills Ideally you will have an interest in health and wellbeing What's in it for you: As a Mobile Engineer / Developer you will receive a comprehensive package: Salary to £75k 26 days holiday Pension Gym membership Private Health and Dental Insurance Access to a wide range of financial services Hybrid working Diverse team environment Apply now to find out more about this Mobile Engineer / Developer (KMP Kotlin Multiplatform iOS Android Native) opportunity. TPBN1_UKTJ

Full Stack Software Engineer Location: London, in-person Salary: Up to £55,000 (DOE) Role overview As a Full Stack Software Engineer, you will help develop and scale the company’s core financial service platform and internal tools. You will work closely with product, operations, and wider business teams to translate practical requirements into reliable software. This role suits someone who can both build and communicate effectively. You should be comfortable writing solid code, explaining decisions clearly, asking the right questions, and collaborating with others. Technical stack JavaScript/ TypeScript React.js Node.js with Express.js Next.js Tailwind CSS PostgreSQLKey responsibilities Collaborate with product and internal stakeholders to design, build, and deliver new features across the platform and internal systems Develop and maintain frontend and backend components using modern frameworks Translate product requirements into clear technical decisions and implementation plans Optimise performance, reliability, usability, and scalability Write clean, maintainable, and testable code aligned with engineering standards Troubleshoot and resolve technical issues with clear communication Contribute to architectural and process decisions to ensure security and adaptability Use AI-assisted tools appropriately for research, prototyping, debugging, and development tasks Stay up to date with relevant technologies and contribute to improving workflows and product quality What we are looking for Minimum 2 years’ experience in full stack web development Strong understanding of modern web application development across frontend and backend Experience shipping production code and improving existing systems Degree in Computer Science, Engineering, or a related field is beneficial but not essential Clear written and verbal communication Ability to collaborate with technical and non-technical stakeholders Strong judgement and problem-solving approach Comfortable asking questions to clarify requirements Ability to use AI tools effectively, including prompt writing and output validation Collaborative, reliable, and easy to work with Nice to have Experience building fintech platforms Experience developing SaaS or user-focused products Familiarity with DevOps practices, CI/CD pipelines, and containerisation Experience using AI coding tools such as GitHub Copilot, Cursor, Claude, or similar What will set you apart Ability to clearly explain technical trade-offs Thoughtful and effective use of AI as a productivity tool Focus on delivering practical, valuable software Strong collaboration and team mindset Why join Opportunity to work on a platform supporting innovative businesses Team culture focused on clarity, ownership, and continuous improvement Exposure to modern tools and AI-assisted development practices Professional development opportunities If you are interested please apply ASAP. The People Network is an employment agency and will respond to all applicants within three - five working days. If you do not hear within these timescales please feel free to get in touch

Position: Senior Full Stack Engineer Workplace: Hybrid (2 days in Monument, London office) Description: Were partnering with a fast-growing, technology-driven organisation operating within the specialty insurance market, building modern platforms to support underwriting, distribution and operational decision-making in a highly regulated environment. This is a senior, hands-on engineering role suited to individuals who take pride in strong fundamentals, clean architecture and end-to-end ownership. The Role: Youll join a flat-structured, highly capable engineering team responsible for designing and building scalable, cloud-native systems. The focus is on delivering reliable, maintainable full-stack solutions that directly support core insurance workflows. Responsibilities will include: Designing, building, and maintaining full-stack web applications using TypeScript/React on the frontend and C#/.NET on the backend (or closely equivalent technologies). Architecting and evolving RESTful APIs and microservices, with strong attention to performance, scalability, and reliability. Taking ownership of end-to-end system architecture, spanning frontend, backend, integrations, and data layers. Working within distributed systems, managing complex data flows and service-to-service communication. Building and operating services in cloud environments (Azure preferred, though AWS or GCP experience is welcomed). Using modern DevOps practices, including CI/CD pipelines, automated testing, containerisation, and Infrastructure as Code. Contributing to engineering best practices, design discussions, code reviews, and continuous improvement within an Agile environment. What We're Looking For: Bachelors degree in Computer Science, Software Engineering, or related field (or equivalent experience). Development experience in the required language, including OOP. In this case, the primary language is Python. experience working with applicable libraries/frameworks e.g. FastAPI experience with commonly used development tools (IDEs, git etc.). Understanding of containerisation and serverless technologies. Working knowledge of cloud platform resources e.g. Azure experience with Agile methodologies and tools (Scrum, Kanban. Azure DevOps, Jira). History or experience within the insurance, reinsurance or financial services is highly valued. Job Title: Software Engineer Location: London, UK Rate/Salary: 65000.00 - 85000.00 GBP Yearly Job Type: Permanent Trading as TEKsystems. Allegis Group Limited, Maxis 2, Western Road, Bracknell, RG12 1RT, United Kingdom. No. 2876353. Allegis Group Limited operates as an Employment Business and Employment Agency as set out in the Conduct of Employment Agencies and Employment Businesses Regulations 2003. TEKsystems is a company within the Allegis Group network of companies (collectively referred to as "Allegis Group"). Aerotek, Aston Carter, EASi, Talentis Solutions, TEKsystems, Stamford Consultants and The Stamford Group are Allegis Group brands. If you apply, your personal data will be processed as described in the Allegis Group Online Privacy Notice available at . To access our Online Privacy Notice, which explains what information we may collect, use, share, and store about you, and describes your rights and choices about this, please go to . We are part of a global network of companies and as a result, the personal data you provide will be shared within Allegis Group and transferred and processed outside the UK, Switzerland and European Economic Area subject to the protections described in the Allegis Group Online Privacy Notice. We store personal data in the UK, EEA, Switzerland and the USA. If you would like to exercise your privacy rights, please visit the "Contacting Us" section of our Online Privacy Notice at for details on how to contact us. To protect your privacy and security, we may take steps to verify your identity, such as a password and user ID if there is an account associated with your request, or identifying information such as your address or date of birth, before proceeding with your request. If you are resident in the UK, EEA or Switzerland, we will process any access request you make in accordance with our commitments under the UK Data Protection Act, EU-U.S. Privacy Shield or the Swiss-U.S. Privacy Shield. TPBN1_UKTJ

Founding AI Engineer / Technical CTO AI / Machine Learning / Backend Engineering £90,000–£100,000 + Equity London – Hybrid OR Remote Working within UK I'm currently working with an early-stage, well-funded tech startup who are looking for a Founding AI Engineer/CTO to join their growing team in London. They are building a next-generation used across various social media and events platforms. With a strong product vision and MVP already in place, they are now looking for their first senior technical hire to shape the future of the platform. In this role, you will take ownership of the core technology across a wide range of areas - focusing on developing and enhancing the platform, building and scaling AI-driven matching systems, improving data-driven feedback loops and designing a robust, privacy-first architecture. You’ll work closely with the founders to define the technical direction and will play a key role in building out the engineering team as the company grows across 2026. The role is based in London and although their preference would be once a week in the office, they can offer fully remote within the UK. Key Responsibilities Design and build AI/ML-powered matching or recommendation systems Develop scalable backend systems in Express Work in full stack environment using Typescript & Nextjs Confident working on Cloud technologies preferably GCP Create and optimise feedback loops to continuously improve platform outcomes Ensure high standards of performance, reliability, and data security Contribute to technical strategy and architecture decisions Support the transition from individual contributor to team leadership as the company scales Collaborate closely with product and leadership teams to shape the roadmap Required Skills & Experience Strong experience building and deploying production AI/ML systems Solid backend or full-stack engineering experience using Nextjs, Typescript, Express Strong understanding of system design, scalability, and performance optimisation Experience leading projects or teams, or readiness to step into a leadership role Experience working on high-impact, user-facing products Desirable Experience within consumer platforms such as social media or events Exposure to behavioural data, user modelling, or network-based systems Background in early-stage startups or building products from zero to one Familiarity with privacy-first design and secure data architectures Salary: £90,000–£100,000 + Equity Benefits: Equity, Pension, Flexible Working If this role sounds of interest, then please apply and I can give you a call. Tim Stock (url removed) (phone number removed) / (phone number removed)

Backend Engineer Salary: Up to £75k (DoE) * Hybrid: 1 day/week in London * No sponsorship offered I'm recruiting on behalf of a fast‑growing accounting‑tech startup that builds automation and AI tools for in‑house finance teams. The company has strong traction and is expanding its engineering team. Role Overview Develop and maintain backend services powering automation features Work closely with product and leadership in a fast‑paced startup environment Rapidly prototype ideas and help scale them into reliable production systems Occasionally contribute small frontend updates (React/TypeScript) Tech Requirements Must have: Java or Kotlin, Spring Boot MySQL, OpenSearch, AWS Nice to have: Groovy, Ruby on Rails, React/TypeScript Candidate Profile Several years' backend engineering experience Prior startup experience strongly preferred Strong problem‑solving mindset Comfortable working independently and collaboratively Must already have the right to work in the UK (no sponsorship) Benefits Share options 25 days holiday + bank holidays Personal learning & development budget High‑impact role in a small, scaling team Services advertised by Gold Group are those of an Agency and/or an Employment Business. We will contact you within the next 14 days if you are selected for interview. For a copy of our privacy policy please visit our website

Salesforce Engineer | £400 – £450 | Outside IR35 | 6 Months | Remote First We’re recruiting for an experienced Salesforce Engineer for a 6-Month contract role. This position will play a key role in leading Salesforce refactoring, modernising backend systems, and driving modern engineering practices across our clients platform. Offering £400 - £450 per day, this role is determined as Outside IR35 and may require occasional travel to the office most local to you. Key Requirements Take ownership of large‑scale Salesforce Apex refactoring and backend process improvements Enhance Salesforce integration architecture, reliability, CI/CD, and automated testing Drive modern engineering practices and support AI‑assisted development tools Resolve technical debt, improve performance, and ensure scalable architecture Requires strong Salesforce Apex, Java, CI/CD, integrations, automation, and refactoring experience Previous experience working in Fintech or regulated environments is beneficial What to do next If this Salesforce Engineer role sounds like a good fit and you’d like to know more, please apply with your most up‑to‑date CV and I’ll be in touch. Salesforce Engineer | £400 – £450 | Outside IR35 | 6 Months | Remote First

We have a current opportunity for a React Developer on a permanent basis. The position will be based in London. For further information about this position please apply. • 10+ years engineering; 5+ years building production React at scale - component lifecycle, rendering behaviour, and bundle architecture are instincts, • TypeScript mastery in strict mode - complex generics, discriminated unions, conditional types, and type-safe API boundary design, • Vite and modern build tooling; tree-shaking, chunk strategy, module federation, and build performance optimisation in CI, • State management at scale: Zustand, TanStack Query, or equivalent; separation of server, client, and ephemeral UI state, • High-frequency WebSocket data at tick-by-tick rates - back-pressure handling, dropped-frame detection, and reconnection strategy, • Browser internals: rendering pipeline, layout/paint/composite lifecycle, memory profiling, GC pressure, and long-task detection, • WebGL, Canvas, or custom rendering engine for high-density, real-time financial data visualisation, • Design system ownership - token architecture, component API design, versioning strategy, and cross-team adoption at scale, • Testing discipline: unit, integration, E2E (Playwright/Cypress), visual regression, and performance budget enforcement in CI, • GraphQL or REST API co-design with backend teams; schema-first development and automated type generation, • Track record of measurably improving engineering standards - patterns or tooling adopted org-wide, • Cloud infrastructure - Azure preferred, AWS considered; IAM, managed services, automated and auditable deployment pipelines, secrets management Nice to Have o Trading UI experience (any asset class) - order books, depth ladders, RFQ workflows, option chains, or execution blotters o Micro-frontend architecture at scale; WASM integration for performance-critical in-browser computation o High-frequency streaming data; managing back-pressure and dropped-frame rendering under sustained load o Financial services or capital markets front-end background; familiarity with market data normalisation What We're Looking For You are the engineer others come to when they do not know what is possible - and you show them. The ETrading Terminal is seen by the world's most sophisticated market participants. You take that personally, ship things that are fast and resilient, set a standard others aspire to, and treat innovation not as a project but as how you approach every ticket. To find out more about Huxley, please visit Huxley, a trading division of SThree Partnership LLP is acting as an Employment Business in relation to this vacancy | Registered office | 8 Bishopsgate, London, EC2N 4BQ, United Kingdom | Partnership Number | OC(phone number removed) England and Wales

GenAI Full Stack Engineer - Consultant Salary: £45,000 - £55,000 plus benefits, perks and healthcare options Job Type: Permanent - Hybrid / 2 x days per week - Travel to client site Base Locations: London, Manchester, Newcastle, Glasgow Overview: We're looking for a GenAI Full Stack Engineer who is passionate about solving real-world challenges through technology. You'll work closely with senior stakeholders both internally and within key clients to create GenAI strategies that translate business issues into relevant technical solutions and competitive propositions that are scalable, secure, and sustainable. Your Role: Collaborate with the team to develop GenAI proof-of-concepts (POCs) for clients using technologies like Retrieval-Augmented Generation (RAG) and intelligent agents. Scale existing POCs to production-ready solutions for customer use. Design and develop Full Stack applications for both GenAI and non-GenAI projects. Support the development of infrastructure to enable robust end-to-end solutions. Grow your skills by exploring and experimenting with emerging technologies, including GenAI. Your skills and experience: Backend Development: Experience in building microservices using either Python with FastAPI, or TypeScript with Express or equivalent Frontend Development: Experience in building React applications using TypeScript, leveraging frameworks such as Next.js or Vite. GenAI Frameworks: Familiarity with tools like LangChain, LangGraph, CrewAI, or Vercel AI (in Python or JavaScript). LLM experience: Practical experience with Large Language Models (LLMs) such as OpenAI, Anthropic, Mistral, or Llama, and tools like Ollama. Cloud Platforms: Proficiency in AWS or Azure for hosting and deployment. Containerization and Orchestration: Hands-on experience with Docker, Kubernetes, and Docker Compose. Infrastructure as Code (IaC): Exposure to tools like Terraform. Monitoring Tools: Familiarity with LLM monitoring tools like Langsmith, Langfuse, or similar. CI/CD: Experience with continuous integration and deployment tools such as GitLab, GitHub, or Jenkins. Vector Databases: Experience with and (but not limited to) ChromaDB, Pinecone, PGVector, MongoDB , Qdrant etc. NoSQL: Familiarity with NoSQL databases (e.g., MongoDB preferred). SQL: Experience working with SQL databases like PostgreSQL. Proficient in Git and version control platforms like GitHub, GitLab, etc. To be successfully appointed to this role, it is a requirement to obtain Security Check (SC) clearance

Senior Software Engineer | Start-up | Cyber | London | Hybrid About the Company Hyre AI is partnering with a fast-growing, well-funded cybersecurity company building for a new reality: the AI threat era. This is a business focused on one of the most important problems on the modern internet: helping digital platforms distinguish genuine users from bots, bad actors, synthetic identities and coordinated malicious behaviour, without adding unnecessary friction for trusted customers. Their technology combines advanced intelligence, adaptive detection and real-world adversarial learning to help security teams see what traditional tools miss. They’ve already built strong traction with major customers and are now scaling both product and engineering. As part of that growth, they’re hiring a Senior Software Engineer to join a high-calibre team working at the intersection of cybersecurity, infrastructure, identity and AI. About the Role As a Senior Software Engineer, you’ll play a central role in building and scaling the core systems behind the platform. This is not a narrow feature factory role. You’ll work on the services, APIs and infrastructure that turn complex detection signals into fast, reliable, production-grade decisions. The work spans backend systems, platform engineering and security-focused product development; ideal for someone who enjoys combining technical depth with product and systems thinking. You’ll be working on Designing and scaling high-throughput backend services and APIs Building systems that ingest and operationalise behavioural, device and threat intelligence signals Improving performance, resilience and observability in latency-sensitive environments Helping create infrastructure that is secure, reliable and easy to integrate into customer environments Partnering closely with founders and cross-functional teammates to translate emerging threats into robust technical solutions Contributing to a culture of high ownership, thoughtful experimentation and engineering excellence This is the kind of role where you can have real influence over architecture, product direction and engineering standards. Required Skills 5 Years of professional experience in software engineering. Experience with TypeScript and/or Go is beneficial (but not mandatory) Strong foundation in Kubernetes and CI/CD pipelines. A resourceful, first-principles mindset; someone who thrives in ambiguity Ownership, curiosity, and a commitment to building things that last High-energy, thoughtful problem-solving, and a low-ego approach to collaboration Experience in an early-stage start-up or scaling environment would be a huge bonus Compensation package Competitive Seed-stage salary Stock options: share in the company’s growth Employer-matched pension The opportunity to help shape a category-defining product at an early stage Why Join This is a chance to work on a genuinely important problem with serious technical depth. You’ll be joining a company tackling the future of online trust head-on: building adaptive security systems for a world of increasingly sophisticated bots, impersonation, automation and AI-enabled attacks. If you want to do meaningful engineering work, operate close to the founders, and help build the technical foundations of a product with real-world impact, this is a standout opportunity

Python Developer / Backend Software Engineer (Python R&D) Cambridge onsite to £55k Would you like to work on Greenfield projects at the cutting edge of medical technology? You could be joining a well funded start-up, collaborating with scientists and other engineers to develop sensing and imaging terahertz solutions. As a Python Developer you'll work on complex problems including image processing, machine learning, numerical simulation, user interfaces, databases, networking and interfacing with hardware. You'll be using a Python based tech stack but with constantly evolving technology that you'll be able to influence. Location: You'll join a talented team based just north of Cambridge (with parking available), on a fulltime basis (with some flexibility). About you: You have strong backend software engineering experience with Python, including Python libraries such as PyTorch, NumPy You have experience working with asynchronous, parallel or distributed systems You have a good knowledge of at least one relational database e.g. SQL Server, Oracle You have a good understanding of TDD, CI/CD practices and modern software engineering best practices You have experience with embedded software and / or IoT You are comfortable in an R&D environment You have an interest and understanding of Machine Learning and AI You are degree educated in a relevant STEM discipline You're collaborative, comfortable with Pair Programming and mentoring more junior engineers Ideally you will also have experience with some of the following: Anaconda, Mamba, Poetry, C++, JavaScript, Haskell, OCaml, Rust What's in it for you: As a Python Developer you will receive a competitive package: Salary to £55k Bonus Healthcare Pension Continual learning and self development Complex interesting work at the cutting edge of technology Apply now to find out more about this Python Developer / Backend Software Engineer (Python R&D TDD) opportunity. At Client Server we believe in a diverse workplace that allows people to play to their strengths and continually learn. We're an equal opportunities employer whose people come from all walks of life and will never discriminate based on race, colour, religion, sex, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. The clients we work with share our values. What's in it for you: As aPython Developer you will receive a competitive package: TPBN1_UKTJ