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Senior backend Java Mongo Engineer We are Hiring a highly skilled Senior Java Engineer to join our Streaming Platform team. You will design and build large-scale, high-throughput services using Java, Spring Boot microservices, distributed design patterns, GraphQL, AWS cloud services, and MongoDB performance optimization techniques. Your responsibilities: • Architect, design, and develop scalable, event-driven microservices using Java and Spring Boot., • Apply microservices design patterns such as Saga, CQRS, Event Sourcing, Circuit Breaker, API Gateway, and Strangler Pattern., • Build and integrate GraphQL APIs for efficient data retrieval., • Implement high-performance MongoDB aggregations, indexing, and query tuning., • Utilize MongoDB Change Streams for real-time data processing., • Use AWS SNS/SQS for asynchronous messaging and workflows., • Deploy and manage microservices on AWS ECS., • Drive ongoing improvements in performance, reliability, and scalability. Your Profile Essential skills/knowledge/experience: • Strong expertise in Java (17+) and Spring Boot., • Experience in distributed microservices architecture., • Proficiency in microservices design patterns., • Strong GraphQL API experience., • Deep knowledge of MongoDB: Aggregations, indexing, optimization, and Change Streams., • AWS SNS, SQS, ECS hands-on experience., • Familiarity with distributed caching systems. Desirable skills/knowledge/experience: • Experience with streaming or high-traffic platforms., • Exposure to Kafka/Kinesis., • Containerization knowledge: Docker, ECS, Kubernetes., • Experience with observability (Prometheus, Grafana, ELK)., • Strong problem-solving skills., • Excellent communication & cross-team collaboration., • Ability to thrive in fast-paced environments.

Full Stack Engineer 📍 Surrey- Hybrid + Fully Remote options | 💼 Permanent | Department: Digital & Technology Salary: Up to £45,000-£65,000 (Depending on experience) A well-established professional services firm is expanding its Technology & Digital Advisory function and is seeking a Software Engineer to join their growing team. This role offers the opportunity to work on software that underpins key advisory services, collaborating across technical and business teams to deliver robust, scalable solutions. What You'll Do • Design, develop, test, and maintain backend or full-stack software features., • Translate business requirements into technical solutions, working closely with domain experts and stakeholders., • Ensure code quality, performance, and maintainability by writing clean, well-architected code and participating in code reviews., • Troubleshoot, debug, and resolve software issues, ensuring reliability and stability of systems., • Contribute to architecture discussions, technical roadmap planning, and continuous improvement., • Collaborate with cross-functional teams including consulting, data, and product to align technology with business objectives. What You'll Bring • Demonstrable software engineering experience in backend, full-stack, or similar roles in production environments., • Strong coding skills within C#, Angular or React (Angular preferrerd), Agile (TDD), • Experience with systems design, APIs, data structures, and software architecture., • Ability to communicate clearly with both technical and non-technical stakeholders., • A proactive, problem-solving mindset with attention to detail and a quality focus., • Experience working in agile or iterative delivery environments. Why Join? • Work within a respected firm combining technology and domain expertise in advisory services., • Engage in varied projects that blend business impact with technical challenge., • Hybrid working model that balances flexibility and in-office collaboration., • Join a supportive team environment that values innovation, professional growth, and technical excellence.

iOS Technical Lead – Hybrid (Crawley) – Contract (Inside IR35) Industry: Aviation / Travel Technology We are currently supporting a leading organisation in the aviation and travel technology sector in their search for an experienced iOS Technical Lead to join their digital engineering team on a hybrid basis (Crawley). This is a key role responsible for leading the design, development, and delivery of a highly visible customer-facing mobile application used by millions of users globally. The Role As the iOS Technical Lead, you will combine hands-on engineering with architectural leadership, driving the evolution of a modern, scalable mobile platform. You’ll work closely with product, backend, and architecture teams while also leading distributed engineering teams, including offshore developers. The platform enables end-to-end customer journeys including booking, account management, and real-time travel services. Key Responsibilities • Lead iOS development and feature delivery across the mobile platform, • Define and evolve mobile architecture (MVVM, Clean Architecture, etc.), • Drive best practices across engineering including TDD, CI/CD, and code quality, • Oversee API integrations (REST / GraphQL) and ensure performance optimisation, • Collaborate with cross-functional teams across product, backend, and DevOps, • Mentor and lead distributed/offshore engineering teams Required Skills & Experience • Strong commercial experience in iOS development (Swift, SwiftUI, UIKit, Objective-C), • Proven experience as a Technical Lead or Senior Engineer with architectural ownership, • Deep understanding of modern mobile architecture patterns, • Experience building scalable, high-performance mobile applications, • Strong knowledge of API integration (REST; GraphQL is a plus), • Experience with modern development practices (CI/CD, TDD, secure coding), • Familiarity with reactive programming (Combine, async/await), • Experience working with distributed or offshore teams is highly desirable, • Understanding of cloud-native and distributed systems Additional Information • Hybrid working: Crawley (2–3 days onsite), • Contract role, • Inside IR35, • Competitive day rate If you’re an experienced iOS Technical Lead looking to work on a high-impact digital product within a fast-paced, customer-focused environment, please apply or get in touch for more details.

We're looking for a hands-on Tech Lead who builds, ships, and leads by example. You'll own architecture, contribute across the stack, and work closely with Product to turn ambiguous problems into impactful solutions. You'll also integrate AI/LLM capabilities into production systems, ensuring reliable, real-world outcomes. Please make an application promptly if you are a good match for this role due to high levels of interest. Key Responsibilities • Translate business needs into scalable technical solutions, • Design and evolve system architecture, • Contribute across frontend, backend, and infrastructure, • Drive best practices in CI/CD, testing, and observability, • Build and optimise AI-powered features (LLMs, inference pipelines), • Communicate clearly with technical and non-technical stakeholders, • 7+ years' software engineering experience, • Proven Tech Lead or senior engineer experience, • Strong product mindset and ownership, • Full-stack capability (strong Python/backend focus), • Experience with AI/LLM systems (or ability to ramp quickly), • Excellent communication and leadership skills xrnqpay, • Experience with DDD, CQRS, or event-driven systems, • Background in large-scale or data-intensive platforms

Role: Golang Engineer Make sure to read the full description below, and please apply immediately if you are confident you meet all the requirements. Job Type:Permanent Location: Burgess Hill (3 days onsite) The Role As a Golang Engineer, you will be responsible for working as part of an agile team to deliver features with your focus being on designing and developing Golang based microservices/APIs. Key responsibilities: • Lead and implement best practices in the team such as consistent branching strategy, coding standards, BDD/TDD, CI/CD and DevOps, • Involvement in every step of the software development life cycle, from design, development, testing release changes and troubleshoot whenever necessary., • Follow the Scrum Methodology, participating actively in sprint backlog refinement, sprint planning, stand-ups, sprint review and sprint retrospective. Essential skills/knowledge/experience: • Excellent knowledge in Golang, • Excellent knowledge in developing microservices & RESTful APIs, • Experience in Kafka, • Experience with SQL/NoSQL database, • Experience developing backend systems, • Excellent leadership and managerial skills, • Experience in Agile (Scrum/Kanban) software development methodology, • Experience with ALM, JIRA, • Good knowledge on DevOps and CI/CD, • Good knowledge on Docker and Kubernetes, • Experience developing resilient, scalable software and writing high quality code, • Good problem solving, analytics, and debugging skills, • Good understanding of BDD/TDD, • Hands on experience with UNIX commands. Rewards & Benefits TCS is consistently voted a Top Employer in the UK and globally. xrnqpay Our competitive salary packages feature pension, health care, life assurance, laptop, phone, access to extensive training resources and discounts within the larger Tata network.

Senior Software Engineer - C# The role will be based from my clients office 4 days per week. As part of our Enterprise Shared Component team, you'll: Design and develop containerised services in a service-oriented architecture using Docker, Kubernetes, REST APIs, and Azure. Contribute across the full stack, including distributed event-driven systems. Collaborate in a high-performing scrum team to deliver robust, high-quality solutions. Mentor junior engineers and influence architectural and delivery practices.Your responsibilities will include (but not limited to): Build and enhance cloud and on-premises services that power healthcare solutions. Design and implement APIs and microservices with a focus on scalability, compatibility, and performance. Contribute to full-stack development, from modern web UIs to backend services and data solutions. Improve CI/CD pipelines and work with Docker, Kubernetes, and Azure DevOps to streamline delivery. Apply cross-functional skills in development and test automation to ensure high-quality solutions. Collaborate, share knowledge, and drive innovation that makes a difference for healthcare professionals and patients.The right stuff: Experience of working with Agile delivery processes - understanding of SAFe framework and agile practices Strong technical communication skills, and the ability to influence others with articulation and insightRequired experience: Bachelor's degree in computer science (or equivalent experience). 5+ years of software engineering experience, ideally with .NET (C#) and modern frameworks. Strong skills in building APIs and microservices (REST, gRPC) and working with databases (PostgreSQL). Frontend experience with Angular, JavaScript, HTML5, CSS3. Hands-on experience with Docker, Kubernetes, and CI/CD pipelines (Azure DevOps or similar). Familiarity with open-source tools, cloud platforms, and infrastructure automation. Understanding of software design patterns, asynchronous programming, and event-driven systems. Bonus: experience in regulated industries (healthcare preferred), cybersecurity best practices, and observability tools.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

Senior Backend Engineer – High-Scale Systems | Python & FastAPI | Security SaaS. They've completed Series A funding, raising $29 million across three funding rounds, and are now seeking a Senior Backend Engineer. Senior Backend Engineer | Python, FastAPI & Scaling | Security SaaS.

A tech company dedicated to data ownership is seeking a Staff Software Engineer (Backend) focused on Rust. You will lead development of high-performance backend systems, influence strategic architecture, and solve complex technical challenges. Ideal candidates are strong in backend development, clou

A global leader in maritime technology is seeking a Senior Software Back-end Engineer to architect and develop scalable Compliance and RegTech solutions.

A large digital platform business is seeking a Senior Java Developer to join their engineering team. This hybrid role in London involves designing and maintaining scalable backend Java services. You will contribute to architecture decisions and mentor junior engineers within an agile environment.

A global technology group is seeking a Senior AI Engineer to design and build autonomous AI systems. This role involves backend development with Python and FastAPI, focused on creating scalable distributed architecture on Google Cloud.

A fast-scaling technology company in the United Kingdom is seeking a Lead Backend Engineer to step into a senior technical role. The ideal candidate will have strong experience with Python or another modern backend language and a proven track record of designing scalable systems. This role promotes

You will develop robust backend services using Python and participate in the full software development lifecycle. The role involves ensuring service reliability, contributing to code quality, and working collaboratively with a remote engineering team.

A fintech company in London is expanding and seeking Senior and Lead Backend Engineers to design scalable systems and shape modern platforms.

Craft:Technology & DevelopmentJob Description:**Your role within the Kingdom**If you answered yes, then our Staff Backend Engineer role on our ads engineering team may be the right role for you!We are an impactful team of problem solvers that are const

A rapidly scaling software company in Greater London seeks a Staff Software Engineer to build backend infrastructure for AI systems in high-stakes environments. You will design backend services for large-scale data processing and collaborate with cross-functional teams.

A global digital asset platform is seeking a Lead Software Engineer to drive the technical roadmap and operational excellence of critical subsystems. The ideal candidate should have over 6 years of backend development experience, with mastery in the Node.

A technology company is seeking an experienced Backend Software Engineer for their Crawler team in Berlin.

A leading software company is seeking an Intermediate Backend Engineer to design and develop cutting-edge security solutions.

A leading Charge Point Operator is seeking an experienced Senior Backend Engineer to develop their Charge Point Management System and customer-facing applications. This full-time, hybrid role based in Southwark involves backend development using Python and FastAPI, API design, and system performance

A financial technology startup in the United Kingdom is seeking a Backend Developer to build secure and performant solutions using Kotlin or Java. Ideal candidates should have significant backend development experience, proficient in Spring Boot, and be familiar with cloud technologies.

A next-generation energy company in London is seeking a Software Engineer to develop backend infrastructure.

A leading cashless payment solutions firm in the UK is seeking a backend developer proficient in Kotlin. You will build a secure and performant backend while collaborating with teams to enhance user experience.

A fast-paced startup in Greater London is seeking a Back-End Developer to design and build robust server-side applications using.This role offers hybrid working and involves implementing critical business logic, developing RESTful APIs, and leveraging AWS services.The ideal candidate should have a s

We are looking for an experienced and responsible Senior QA Automation Engineer with a strong technical background in backend and API testing. You will be a key member of our QA team, maximizing product quality by focusing primarily on the automation of our APIs and backend services. While your core

This role involves collaboration with frontend engineers and product teams while applying analytical techniques to solve real-world problems. The successful candidate should possess strong experience in backend development, particularly with Python, as well as familiarity with cloud platforms and a

A technology company seeking a Senior Backend Engineer to build and scale backend systems. Responsibilities include designing microservices in Kotlin, collaborating across teams, optimizing system performance, and mentoring other engineers.

Ensure optimal performance, quality, and reliability across backend services. Follow best‑practice engineering standards, design patterns, and architectural principles. Java backend development (Java 17+).

A tech-driven enterprise solutions provider in London seeks a product engineer with backend expertise to enhance user-facing features.

Apply now to find out more about this Backend Software Engineer / Developer opportunity. Backend Software Engineer C++ Rust Low Latency Trading. Strong backend OOP, multithreaded engineering experience with C++ and proficiency in Rust.

We’re looking for a technically exceptional engineer who thrives with agency and ownership.

A leading software company in London is seeking a Staff Software Engineer to build backend infrastructure for advanced AI systems. The ideal candidate has strong expertise in Python and modern backend frameworks, with a solid understanding of PostgreSQL, RESTful APIs, and microservices.

A technology consulting firm is looking for a Senior Python developer to enhance applications for investor portfolio management.You will collaborate with business analysts and developers, focusing on designing production APIs, improving system efficiency, and employing cloud-native solutions.The ide

A leading IT consultancy is seeking an experienced Senior Backend Developer for a fully remote role in the UK.

A leading financial services recruitment agency is seeking an experienced Python Engineer to contribute to a front office-facing platform within a tier-one investment bank. This role involves building backend services in Python, working on data-intensive workflows, and improving system design.

A fintech company based in London is seeking a skilled Backend Engineer to design and maintain core backend systems for financial products.

A premier financial infrastructure platform is seeking a Software Engineer to join their Money Movement team in London. The role involves developing APIs and services for managing money, with responsibilities including debugging production issues and mentoring junior engineers.

A leading sports technology company in Greater London is seeking a Senior Software Engineer (Java) on a contracting basis. You will develop robust backend services and APIs, work closely with cross-functional teams, and manage deployments.

Backend Software Engineer / Developer (C#. Backend Software Engineer / Developer C#. Are you a bright, ambitious Backend Software Engineer who enjoys collaborating and working on complex systems with cutting edge technology?.

Full‑Stack Backend Ownership: Maintain and optimise our data layer, specifically working with PostgreSQL. Hybrid Infrastructure: Oversee the engineering and deployment of services across AWS and GCP via Kubernetes. Relationship Building: Established trust with the engineering team as a reliable, s

This role requires over 6 years of backend engineering experience, ideally with JVM-based languages and cloud platforms. A dynamic fintech company in Greater London is seeking a Senior Backend Engineer to enhance their payment management platform. The company offers a competitive salary, stock optio

We’re looking for a software engineer to join the backend team and continue to scale and improve our existing technology, while also innovating on new products, infrastructure and tooling. This will be your opportunity to join a highly motivated team of talented engineers who value collaboration a

Our engineering discipline builds the technology that enables MoonPay to learn quickly and scale easily. We organize in small cross-functional squads of 4-6 engineers and an embedded Product Manager and Product Data Analyst. Experienced in Software Engineering at leading startups or fast growing tec

A fast-growing cybersecurity startup is seeking a Senior Python Engineer to design and develop scalable backend systems using Python and AWS serverless technologies.

A major financial institution in Greater London is seeking a Senior Lead Software Engineer to develop backend libraries using Java and Spring Boot. This role requires strong technical expertise, problem-solving abilities, and collaboration with product engineering teams. Ideal for those proficient i

A leading digital payment company in the UK is seeking a Senior Backend Software Engineer to shape the future of digital welfare payments. You will design robust multi-service solutions, implement testing strategies, and mentor junior engineers.

Engineering background in Computer Science, Mathematics, Software Engineering, Physics or similar field. Engineers work autonomously and make decisions independently, within a community that will support and challenge you as you grow and develop, becoming a strong technical contributor and engineeri