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Senior Software Engineer | Data Visualisation & Graphics | London London (Hybrid) Salary up to £200,000 + benefits Most engineers consume visualisation libraries. A small number build them. We’re working with a highly successful software company whose charting technology powers applications used by thousands of organisations worldwide, from global financial institutions to technology businesses and enterprise software providers. As adoption continues to grow, they’re looking for a software engineer to help build the rendering systems, charting components, and visualisation infrastructure that sit at the heart of the product. This is not a dashboard-building role. You’ll be working on the underlying systems that make complex visualisations fast, accurate, and scalable. The challenges range from rendering performance and interaction design through to algorithms, graphics, API design, and numerical correctness. • Designing and building core charting features used by developers around the world, • Working across rendering, interaction, animation, and visualisation infrastructure, • Solving performance-critical problems involving Canvas, SVG, and large datasets, • Improving correctness, precision, and usability across a sophisticated charting platform, • Designing APIs that are elegant, flexible, and easy for developers to adopt, • Taking features from initial concept through to production release, • Collaborating with a small team of highly experienced engineers building a market-leading product, • Strong JavaScript or TypeScript engineering skills, • Experience working with Canvas, SVG, WebGL, graphics systems, visualisation products, or rendering pipelines, • Strong understanding of algorithms, data structures, and software architecture, • Experience building complex software products rather than purely application-layer development, • Exposure to languages such as C++, Java, C#, Rust, Go, or similar, • Understanding of performance optimisation and rendering trade-offs, • Appreciation of the mathematical concepts underpinning data visualisation and graphics, • Passion for engineering quality and technical excellence, • Charting libraries, • Data visualisation platforms, • Graphics or rendering engines, • CAD, GIS, mapping, simulation, or scientific software, • Developer tools, • High-performance frontend systems, • Financial technology visualisation platforms, • Build technology used by thousands of engineering teams globally, • Work on rendering and graphics problems rarely found in commercial software roles, • Join an engineering-led organisation with exceptionally high technical standards, • High levels of ownership and autonomy, • Small team, significant impact, • Opportunity to deepen expertise in performance, graphics, visualisation, and systems design, • Salary up to £200,000, • Hybrid working (London), • Private healthcare, • Pension, • Additional benefits If you’re interested in building the technology behind modern data visualisation rather than simply consuming it, we’d be keen to speak with you. #J-18808-Ljbffr

Date: 2026-09-16T00:00:00 Location: Slough, Berkshire, GB, SL1 1 Employment Type: Full Time Closing Date: 2026-10-14T18:00:34.157 JET's Information Security organisation protects a technology-led, cloud-native platform serving millions of customers across multiple markets. JET's building security into the foundations of how we design, engineer, and operate our cloud-native platforms at scale, across our technology organisation. JET's Security Engineering team builds the tools, guardrails and controls that let every engineer at JET ship secure code, over 100 times a day. As a Senior Security Engineer, you'll design, build and run the security solutions our 1st and 2nd line InfoSec teams and wider engineering community rely on daily, from vulnerability scanning and access monitoring to AI security guardrails. You'll work hands-on within JET's global Security Engineering team, turning security policy into code and every engineer into a security-conscious one. These are some of the key components to the position: • Design, build and deploy security controls and guardrails across JET's cloud-native platforms, including AI security solutions protecting customer-facing products., • Run password audits, network and web application vulnerability scans, and intrusion detection to identify and close gaps before they're exploited., • Automate security processes as code, embedding compliance and IaC checks into CI/CD pipelines shipping over 100 times daily., • Conduct risk audits and assessments, translating findings into practical recommendations for engineering teams., • Monitor and analyse system access logs, flagging anomalies and supporting incident response., • Plan and test security backup and disaster recovery processes to keep JET's platforms resilient., • Partner with 1st and 2nd line InfoSec teams as customers of your solutions, translating technical work for product and engineering audiences., • Practical experience writing and deploying applications or tooling into cloud-native environments (AWS, Azure or GCP)., • Strong, demonstrable skills deploying AI security solutions, guardrails, and defences for AI systems used by customers., • Proficiency in at least one of C#, Python, Java, PowerShell or Bash, with a track record of automating security processes., • Working knowledge of Infrastructure as Code and Compliance as Code practices., • Comfort operating in Agile, DevOps-driven teams with frequent, continuous delivery., • Confident stakeholder management, translating security risk and technical decisions into language product and engineering teams act on., • A collaborative, evangelist mindset, building trust so others choose secure defaults rather than having security imposed on them. At JET, this is how we play Our teams forge connections internally and work with some of the best-known brands on the planet, giving us truly international impact in a dynamic environment. Being the best at what we do isn't just about delivering on our strategy. It's a competition for something incredibly valuable - our customers' choice. Every time a customer decides where to order, they're picking a side. At the heart of the JET Customer League are our values and behaviours. They guide every interaction, every decision, every innovation. These are the actions we need to perform consistently and brilliantly, to surpass the competition and earn our customers' loyalty, again and again. Fun, fast-paced and supportive, the JET culture is about movement, growth, helping one another to succeed and celebrating wins. By truly living our values and embodying our behaviours, we're building a customer-first culture which enables us to stay one step ahead of the competition. No matter who you are, what you look like, who you love, or where you are from, you can find your place at Just Eat Takeaway.com. We're committed to creating an inclusive culture, encouraging diversity of people and thinking, in which all employees feel they truly belong and can bring their most colourful selves to work every day. Want to know more about our JETers, culture or company? Have a look at our career site where you can find people's stories, blogs, podcasts and more JET journeys. #J-18808-Ljbffr

Are you a QA Automation Engineer who loves building reliable test automation, improving quality, and exploring smarter ways to test? We are looking for a confident and detail-driven QA Automation Engineer to join our Software team in Beaconsfield. This is an excellent opportunity to work across a varied technology landscape, supporting the development and delivery of intranet, web, desktop and mobile solutions used across financial services and the film, television and media industries. As a QA Automation Engineer, you will play a key role in supporting agile software development by creating, maintaining and evolving automated test frameworks and test cases. You will work with a high level of autonomy, helping define test strategies, execute test plans and ensure our products meet the highest standards of quality, reliability and usability. • Creating, maintaining and developing robust automation frameworks., • Designing automated testing architecture and expanding automated test coverage using Cypress or other agreed tools., • Executing system, integration, regression, functional, interface, acceptance, performance, API and security testing., • Using tools such as Jira, TestRail and Confluence to manage defects, test assets and documentation., • Analysing business requirements and translating them into effective test strategies and plans., • Exploring practical AI-driven testing approaches, including AI assisted test case generation, test data creation, result analysis and visual or regression checks., • Working closely with developers and QA colleagues to troubleshoot issues, improve processes and support knowledge sharing across the team., • At least 5 years' experience in software testing, including 2 or more years focused on test automation., • Strong experience creating and maintaining automation frameworks., • Hands-on knowledge of end-to-end automation tools, ideally Cypress., • Experience integrating automated tests into CI/CD pipelines, such as Jenkins or GitHub Actions., • Good understanding of performance testing, API testing, UX/UI testing, BDD and TDD approaches., • Working knowledge of JSON, SQL and modern software testing practices., • Experience working in an Agile environment., • Comfort using AI tools to support testing activities, with the judgement to review and validate AI generated output., • Excellent communication, analytical and problem-solving skills., • Strong attention to detail and the ability to manage multiple priorities in a fast-paced environment., • Experience testing or reconciling financial systems, reports, payroll or auto enrolment systems., • Skills in Java, JavaScript or Python., • Knowledge of automated API or endpoint testing, ideally REST-assured., • Experience with microservice testing., • A degree in Computer Science, Engineering or a related field. You will join a collaborative software team where quality is taken seriously and where your ideas can make a visible impact. This role offers the chance to work on varied, business critical systems, shape automation practices, explore emerging AI-assisted testing techniques and contribute to products used across fast-moving creative and financial services environments #J-18808-Ljbffr

You'll lead technically and, in most cases, lead people too — owning delivery outcomes for a client engagement and setting technical direction. You're expected to be full stack in practice: comfortable owning a backend built in a strongly typed language, equally comfortable in the front end, and hands on with the infrastructure and delivery pipeline underneath it all. Most of your week will be spent working alongside client teams ,sometimes fully remote, sometimes on site. You'll need to be able to get into London on short notice when a client needs it, so anywhere up to around two hours out is fine. • A strongly typed backend language — .NET or Java — paired with genuine front-end capability across JS/Node/TypeScript., • Ownership of the full delivery pipeline: CI/CD, infrastructure as code (Terraform or equivalent), testing built in as standard., • Leadership experience — ideally a couple of stints at lead level owning a cross-functional team and its outcomes. If you're a staff engineer who's owned the technical direction without formally managing people. for more information please get in touch. #J-18808-Ljbffr

As a DevOps Engineer you need to have a background in software engineering with experience in Java, Ruby or Python and experience of development and deployment in public cloud environment such as AWS, Azure and Google GCP. Work experience as a DevOps Engineer or similar software engineering role. We

United Kingdom is seeking a technically versatile software engineer to contribute across a range of projects and client environments.You will work with languages like C/C++, Java, Python, Go, Rust and Node.This role favors self-starters who own their work, love learning, and collaborate effectively

A technology company in Slough is seeking a DevOps Engineer to build functional systems that enhance customer experience. Candidates should have a strong background in software engineering, particularly with Java, Ruby, or Python, and experience in public cloud environments such as AWS or Azure.

This full-time position emphasizes a collaborative work environment, utilizing modern development practices to enhance the broadband experience for members.The ideal candidate will have strong skills in Test Driven Development, pair programming, and be familiar with Java, AWS, and a variety of frame

Nice to have technologies and experience:.Software engineering (C/C++/Java/Python/Go/Rust/Node).Relational and non-relation data technologies.The personal traits we are looking for are:.Self-learning- Being a team player, ie take ownership of contributing to the overallteam capability and knowledge.

As a DevOps Engineer you need to have a background in software engineering with experience in Java, Ruby or Python and experience of development and deployment in public cloud environment such as AWS, Azure and Google GCP. Work experience as a DevOps Engineer or similar software engineering role. Sp

Pioneertechlabs in Slough is seeking a skilled DevOps Engineer to enhance customer experiences through functional systems.This role requires providing technical support, performing root cause analysis for errors, and developing software in Java, Ruby, or Python.The ideal candidate will have experien

Build Circle is seeking a Lead Technology Consultant to drive delivery outcomes for client engagements in London.You’ll be technically hands-on across backend (.NET/Java), frontend (JS/TS), and the delivery pipeline, while guiding a cross-functional team.You’ll alternate between remote work and

Quality Engineering Manager Location: London - Hybrid Salary: £65,000 - £75,000 We are seeking an experienced Quality Engineering Associate Manager to join a growing Quality Engineering practice within a leading global professional services and technology organisation. This is a hands-on technical leadership role for a senior practitioner moving into management. You'll remain close to the code while taking ownership of tooling strategy, automation frameworks, QE assessments and team leadership across client engagements. The ideal candidate will combine strong technical expertise with experience leading engineers, managing client relationships and shaping Quality Engineering strategy. Key Responsibilities as a Quality Engineering Manager Remain hands-on with automation, coding, framework development and code reviews. Define and own tooling strategies and automation frameworks across client accounts. Conduct QE framework assessments and maturity evaluations, identifying gaps and improvement opportunities. Lead, mentor and support QE automation engineers. Support the development and delivery of Quality Engineering strategies. Manage project-level client relationships and communicate progress, risks and recommendations. Drive adoption of GenAI tooling, including Playwright with MCP, GitHub Copilot and Claude. Contribute to internal QE communities, standards and best practices. Experience you'll need as a Quality Engineering Manager Several years' experience defining and implementing modern Quality Engineering practices and automated testing. Strong hands-on coding experience in JavaScript/TypeScript, Python, Java or C#. Experience building and assessing automation frameworks, not just using them. Hands-on experience with GenAI in a QE context and AI-assisted coding tools. Experience defining tooling strategies and conducting QE assessments. Experience leading or mentoring QE or automation engineering teams. Strong client-facing and stakeholder management skills. A collaborative approach with a passion for quality, productivity and continuous improvement. Comfortable adapting your technology stack and approach to different client needs. What's on Offer Competitive salary and benefits package. Bonus Private medical insurance. Training and development opportunities. Opportunity to work across diverse client engagements and technology environments. If you're a hands-on Quality Engineering professional ready to take the next step into technical leadership and management, we'd love to hear from you. To hear more about this Quality Engineering Manager opportunity, hit apply or get in touch with Sophie Higginson at Anson McCade for a confidential discussion. AMC/SHI/QEAM8 TPBN1_UKTJ

Senior Java Developer (AWS, Microservices) - Travel - Sussex. My new client is looking for a Senior Java Developer (AWS, Microservices) to join the team on a contract basis.

Proven experience of 7+ years working as a Java Developer in product development or services environment. Technical Skills: Proficiency in Java, Spring Framework, Hibernate, and RESTful APIs. Job DescriptionWe are seeking a highly skilled and experienced Senior Java Developer to join our dynamic tea

Seeking a Full Stack Java Engineer to contribute to a scalable software platform, focusing on architecture and complex technical challenges in a collaborative environment.

Job DescriptionWe are seeking a highly skilled and experienced Senior Java Developer to join our dynamic team. The ideal candidate will have a strong background in Java development, extensive experience with AWS, database management, and preferred work experience in batch processing. As a Senior Jav

Seeking a Software Engineer to design, develop, and enhance software solutions using Java and security technologies within a financial organization.

Design and development of robust, scalable, and efficient Java applications. Proven experience of 7+ years working as a Java Developer in product development or services environment. Technical Skills: Proficiency in Java, Spring Framework, Hibernate, and RESTful APIs.

Seeking Electrician Improvers with ECS/CSCS cards for a 7-8 month contract in Bexhill-On-Sea, requiring experience with steel conduit.

Back-End Development - Build and optimise multi-threaded server-side applications in Java.

Experienced Java Developer sought for a hybrid role in Ipswich, contributing to software product design and development, mentoring juniors, and modernizing processes.

Develops, debugs, tests, and deploys software enhancements, designs single-page applications using React/TypeScript, and integrates with REST APIs for critical national infrastructure.

About IRISIRIS Software Group is one of the UK's largest privately held software companies, trusted by 100,000+ businesses, schools and accountancy firms to keep their operations running.Our software pays 1 in 6 UK employees, supports over 12,000 schools, and is relied on by 91 of the top 100 UK acc

ResponsibilitiesAs a Senior Software Engineer in our Professional Services team, you will:Work in client-projects as a lead Bloomreach developer, projects which typically impact millions of people on a monthly basis;Assist with the integration of our products using Java and modern frontend framework

Leads platform projects crossing multiple teams, evolving runtimes or middleware patterns for interoperability and multi-tenant scale.Diagnoses and resolves complex cross-service issues; enforces versioning, compatibility, and safe rollout practices.Drives observability standards, capacity planning,

Senior Software DeveloperAbout Reply:Reply specialises in designing and implementing solutions based on new communication channels and digital media.Structured as a network of highly specialised companies, Reply supports leading European industrial groups in sectors such as Telco & Media, Industry a

Go, Python, Java, etc)Experience with Linux operating systems internals, and some knowledge of networking, cloud storage, and scaling.

About IRISIRIS Software Group is one of the UK's largest privately held software companies, trusted by 100,000+ businesses, schools and accountancy firms to keep their operations running.Our software pays 1 in 6 UK employees, supports over 12,000 schools, and is relied on by 91 of the top 100 UK acc

QualificationsRequired Qualifications: 9+ years experience in Software Engineering, Computer Science, or related technical discipline with proven experience maintaining and delivering production software coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, Go, Ruby, Rust

RequirementsBachelors degree in related field, or equivalent professional experience8+ years of professional software development experienceProven expertise in backend microservice design and development, preferably using GolangStrong experience developing modern web frontends, preferably using Angu

NOTE: This position can be remote in any EMEA country ClickHouse has a hiring presence.We are hiring talented Full Stack Software Engineers for our Control Plane team.The team focuses on great user experience, seamless, automated, and scalable cloud infrastructure deployment, and lifecycle managemen

QualificationsRequired Qualifications: Bachelor's degree in computer science or related technical field AND extensive years of technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR equivalent experience. Preferred Qua

QualificationsRequired Qualifications9+ years experience in Software Engineering, Computer Science, or related technical discipline with proven experience maintaining and delivering production software coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, Go, Ruby, Rust, o

RequirementsBachelors degree in related field, or equivalent professional experience2+ years of professional software development experienceProven backend development experience with Golang building scalable microservices and SaaS solutionsFrontend experience with Angular or modern JavaScript/TypeSc

OR Bachelor's Degree in Computer Science, Electrical Engineering, Electronics Engineering, Math, Physics, Computer Engineering, or related field AND 4+ years experience in Software Engineering, Computer Science, or related technical discipline with proven experience maintaining and delivering pro

About IRISIRIS Software Group is one of the UK's largest privately held software companies, trusted by 100,000+ businesses, schools and accountancy firms to keep their operations running.Our software pays 1 in 6 UK employees, supports over 12,000 schools, and is relied on by 91 of the top 100 UK acc

Maintain and improve the GitHub Load Balancer, and other systems related to traffic management at GitHub Write, review, and maintain code primary in Go and Ruby & Rails Mentor other engineers in their technical and architectural decision making Participate in the on-call rotation, and team meeti

Recruitment Location: United KingdomCounty / State / Province: LeicestershireCity: LeicesterRequisition ID: 5468 Here at Allied Universal Electronic Monitoring we have an exciting opportunity for an experienced Professional Services Engineer to join our business.If you are looking to join a dynamic,

Elastic, the Search AI Company, enables everyone to find the answers they need in real time, using all their data, at scale — unleashing the potential of businesses and people.The Elastic Search AI Platform, used by more than 50% of the Fortune 500, brings together the precision of search and the

QualificationsRequired Qualifications 6+ years experience in Software Engineering, Computer Science, or related technical discipline with proven experience maintaining and delivering production software coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, Go, Ruby, Rust

They’re more than just words for us.They are the guiding values of how we build our teams, cultivate leaders, and create a culture where people feel connected.We take care of our employees so they can take care of our customers.Customers who come from all walks of life just like us.We hire incredi

GitLab is the intelligent orchestration platform for DevSecOps.GitLab enables organizations to increase developer productivity, improve operational efficiency, reduce security and compliance risk, and accelerate digital transformation.More than 50 million registered users and more than 50% of the Fo

About IRISIRIS Software Group is one of the UK's largest privately held software companies, trusted by 100,000+ businesses, schools and accountancy firms to keep their operations running.Our software pays 1 in 6 UK employees, supports over 12,000 schools, and is relied on by 91 of the top 100 UK acc

RequirementsBachelors degree in related field, or equivalent professional experience5+ years of professional software development experience building production-grade distributed systemsStrong proficiency in backend microservices development, preferably with GolangProven experience in modern fronten

Building the Future of Open FinancePayward - the parent company behind Kraken, NinjaTrader, Breakout, xStocks, Payward Services and CF Benchmarks - has spent the last 15 years building one of the most modern and globally accessible financial infrastructure platforms in the industry, built to advance

QualificationsRequired Qualifications 9+ years experience in Software Engineering, Computer Science, or related technical discipline with proven experience maintaining and delivering production software coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, Go, Ruby, Rust