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    Hybrid Middleware Engineer Linux, APIs & Automation

    Queen Square Recruitment Ltd is looking for a Middleware Engineer to work in a hybrid model across London, Reading or Leeds. This role involves supporting and maintaining middleware platforms, ensuring system stability and performance. The ideal candidate will have strong Linux/Unix and API skills, wit ...

    Java GUI Developer Swing / MOD / Defence

    Required Skills Java MOD Linux UI Job Summary JavaDeveloper - Real-time Systems Farnborough, Surrey-5daysonsite UKPassportrequired-eligibleforMODclearance Standard 8 is re ...

    Senior API & Cloud Native Lead Engineer

    Queen Square Recruitment is seeking experienced Lead Engineers for a major digital transformation programme in Edinburgh. This hands-on leadership role involves guiding Agile feature teams to develop scalable API and microservices solutions while actively participating in design and development. The id ...

    Integrations Engineer: API & Data Pipeline Innovator

    Bupa Dental Care in Bristol is seeking an Integrations Engineer to design, build, and maintain data and API integrations within an Agile framework. You will enhance interoperability and support data-driven decision-making across the business. The role requires strong skills in Microsoft Azure Data Serv ...

    Senior Automation Engineer Flutter & API Frameworks

    Zippd in Manchester is looking for a Senior Automation Tester to lead the quality assurance of its mobile and API ecosystem. This role requires building robust automation frameworks from scratch, with a specific focus on Flutter applications. The ideal candidate will have 5+ years of QA automation expe ...

    Staff Platform Engineer — Content & API Platform

    Marks & Spencer Plc is seeking a Staff Software Engineer to enhance M&S’s Content Domain platform. You will design and build backend capabilities, focusing on APIs, services, and automation pipelines while working with a range of teams to deliver optimal digital experiences. The role requires strong pr ...

    Senior Rendering API Engineer — Console Graphics

    A global leader in gaming entertainment seeks a senior engineer to advance PlayStation graphics technology. This role will focus on the design and implementation of rendering APIs vital for game development. Candidates should have experience with low-level graphics architecture and rendering code on consoles. Th ...

    QA Engineer: API & Data Validation (Hybrid)

    A global data and AI solutions company is seeking an experienced QA Engineer in Northampton to validate end-to-end workflows across financial platforms. Responsibilities include manual and automated testing of REST APIs, validation of decisioning logic, and participation in Agile ceremonies. Ideal candidates mus ...

    Senior Performance Test Engineer – Load & API

    A technology company in Budock Water is seeking a Senior Performance Test Engineer to develop and execute performance tests for web and API systems. You will analyze performance bottlenecks and design testing frameworks while collaborating with development and DevOps teams. The ideal candidate will have over thr ...

    Senior Solutions Engineer, Enterprise Data & API

    Bloomberg L.P. is seeking a Solution Engineer for its London office. This role involves providing best practice consultation for Enterprise Data services, requiring strong programming and client-facing skills. Candidates should have over 5 years of software development experience, particularly in programming ...

    Lead Python Engineer: Architecture & API Design

    Partnerize is looking for a Lead Python Engineer situated in Edinburgh, Scotland. The ideal candidate will produce clean and maintainable designs, lead software development teams, and have extensive experience with Python and REST APIs. The role includes benefits such as 25 days holiday, enhanced parental leave ...

    Automation QA Engineer: Playwright & API Testing

    A leading technology company in Manchester seeks a motivated Automation Engineer to enhance quality assurance. The candidate will develop automated tests focusing on web applications and APIs, ensuring software quality through collaboration and effective testing strategies. Applicants should have at least 2 year ...

    Basildon .NET API & Backend Engineer (Contract)

    A tech consulting firm in Basildon is seeking a skilled .NET Developer (.NET Coder) to design and maintain applications using modern Microsoft technologies. The role involves developing RESTful APIs and backend services, writing clean C# code, and collaborating with teams in Agile delivery. Candidates should hav ...

    Senior Python Engineer Cloud API & Leadership

    A leading consulting firm is seeking a Senior Python Engineer based in Greater London to design and develop scalable software solutions. The role requires strong expertise in Python frameworks and cloud environments, especially AWS, Azure, or GCP. Responsibilities include mentoring staff and leading technical di ...

    AWS API Architect & Data Platform Engineer

    Capgemini in Birmingham is seeking an experienced AWS API Engineer / Data Architect to design and deliver secure and scalable API architectures. The role involves architecting microservices solutions across multiple client applications while ensuring system integration and security protocols are met. Candidates ...

    Remote Backend Engineer Scalable API Systems

    YO IT Consulting is seeking a Backend Engineer to architect and build robust backend systems for innovative digital products. This role offers an opportunity to collaborate with top-tier engineers in a fully remote environment, tackling complex challenges and delivering impactful solutions. The success ...

    Backend Engineer: TypeScript, Node.js & API Design

    Backend Software Engineer Frasers Group is a retail company that owns and operates a portfolio of brands across sports, fashion, and lifestyle sectors. Location: Shirebrook, United Kingdom Posted: 10 months ago Job Type: Full Time Visa Sponsorship: Not provided </p ...

    Senior PHP Backend Engineer – Cloud & API

    A cybersecurity solutions provider in Fareham is looking for a Senior Partnership Delivery Consultant. The role involves collaborating with teams to convert challenges into software solutions, researching new technologies, and mentoring developers. Strong expertise in PHP and familiarity with cloud infrastructur ...

    Senior Enterprise Solutions Engineer API & Integration

    A pioneering legal tech company based in Greater London is seeking a Senior Customer Solutions Engineer who will work across Sales, Product and Customer Success. The candidate should have strong technical skills, integrating solutions to enhance customer experience. Responsibilities include building integrations ...

    Clojure Backend Engineer — Banking API & Payments

    Laotop, basé au Royaume-Uni, recherche un ingénieur logiciel pour développer des applications en Clojure. Vous ferez partie d'une équipe travaillant sur une banque API-first qui gère la conformité et les paiements. Les candidats doivent avoir une solide compétence en ingénierie logicielle et un intérêt ...

    Frontend Engineer (Remote) — API‑Driven Platform

    A technology company in London is seeking a software developer to enhance their new HX Workbench platform. The ideal candidate will have experience in software development and proficiency in Python, as well as familiarity with cloud infrastructure. Responsibilities include translating designs into web pages, sup ...

    Remote Backend SaaS Engineer — Python & API

    A leading open source software company is looking for a talented software developer to create new features and improve the Landscape codebase. The role involves remote collaboration with a global team, committing to high-quality code and automated testing, and requires strong proficiency in Python and experience ...

    Senior Backend Engineer: API, AWS & Observability

    Canva is searching for a Backend Engineer to join their Flourish Platform team, focusing on core infrastructure and features for data visualisation tools. The ideal candidate will have significant experience in building API-based backend services, utilizing AWS, and ensuring application security. This collabo ...

    Senior Performance Test Engineer – Load & API

    A technology services company in Northern Ireland is seeking a Senior Performance Test Engineer to work within an agile team. You'll develop and execute performance tests and analyze bottlenecks across various layers. The ideal candidate should have strong proficiency with performance testing tools and solid kno ...

    QA Test Engineer Automation & API (Hybrid)

    LUSH is seeking a QA Test Engineer in Poole to ensure high-quality implementation and testing of software. This role involves collaboration with a cross-functional engineering team to validate approaches and resolve issues. The ideal candidate will have experience in API and web/mobile UI testing. Bene ...

    Senior Performance Test Engineer – API & Cloud

    A leading technology solutions provider is seeking a Performance Test Engineer (Senior Associate) to join their team in Derry/Londonderry. The role involves developing and executing Non-Functional tests while collaborating with agile teams. Candidates should have over 3 years of performance testing experience, s ...

    Senior Backend API Engineer – Hybrid + Relocation

    A leading independent video game developer is looking for a Senior Online Developer in Warwick. This role involves building and supporting internal and external web APIs, working primarily on back-end developments. The ideal candidate should have strong skills in NodeJS, JavaScript, and TypeScript, alongside exp ...

    Senior Data & API Engineer — Ads Analytics

    Roku is looking for a Senior Software Engineer in Cambridge, UK, to bridge software and data engineering. You will develop APIs using Spring Boot and manage data pipelines with Apache Spark. Ideal candidates will have over 10 years of experience, with skills in distributed computing and data visualization. Roku ...

    Hybrid Integration Engineer – API & Finance Data

    About The Company: OCS UK & Ireland is a leading facilities management company with 50,000+ colleagues and a turnover in excess of £2bn. We deliver innovative, award-winning services within facilities management, hard services, cleaning, security and catering.Our mission is to make people and p ...

    Solutions Engineer SaaS Integrations & API Expert

    Global-e is seeking a skilled Solutions Engineer to support Sales, Project, Product, and R&D teams by conducting technical discussions with online retailers and brands looking to expand their cross-border business. The role involves leading technology integration discussions, assisting clients with und ...

    Senior .NET Engineer — Cloud, API & Mentoring

    Different Technologies Pty Ltd. based in Greater London is seeking a Senior .NET Developer to design and build modern software solutions across various industries including fintech and healthcare. This role requires 6+ years of .NET experience, and offers a collaborative environment where you will mentor less ...

    QA Automation Engineer Azure & API Testing

    Nine Twenty in Scotland is seeking a QA Engineer to enhance quality, reliability, and performance of customer solutions in a hybrid work environment. You will engage in automation testing, develop test frameworks, and collaborate across Agile teams. Ideal candidates will have experience with Selenium, strong com ...

    Lead Backend Engineer — Cloud & API Focus

    User Experiences and Business Goals Making progress towards our business and team goals also includes focusing on enhancing user experiences. Who Are We Looking For? We are seeking individuals with expertise in languages like Java , C#, or Go (or similar backend languages). ...

    Security Engineer

    Granola Founding Security Engineer Hey! We're team Granola If you haven't already, you should check out what we're building, and why you should work here. We're looking for our founding security engineer who is passionate about application security to help us protect our users and build ...

    Security Engineer

    Job Title: Senior Security Engineer Location: UK Remote Salary: Competitive daily rate outside IR35 Why Apply? This opportunity suits an experienced Security Engineer who enjoys influencing platform and solution design at an early stage. Worki ...

    Senior Cloud & Security Software Engineer (AWS, CI/CD)

    RELX INC in Greater London is seeking a skilled software developer focused on delivering secure, scalable software and cloud infrastructure. The successful candidate will design, build, and support production-ready solutions in AWS while mentoring colleagues. This role requires a strong background in P ...

    Senior Software Engineer AI Driven Security Platform (Remote)

    A cybersecurity firm is seeking a Senior Software Engineer located in London. This role focuses on leading technical projects and collaborating with cross-functional teams to develop innovative solutions in offensive security. The ideal candidate has over 5 years of experience in full-stack software engineering, ...

    Staff Software Engineer, Privacy & Data Security — Remote (Europe)

    A leading security technology firm in London is seeking a Staff Software Engineer to drive technical initiatives and bolster its engineering team. You will manage large projects, design new product features, and mentor junior engineers in a rapidly scaling environment. The ideal candidate will have 10+ years of ...

    Senior Cloud Software Engineer AI Powered Security (Go)

    CrowdStrike Holdings, Inc. is seeking a Senior Software Engineer for the Cloud team in London. This role offers the unique opportunity to work on AI-native solutions that enhance cybersecurity. The successful candidate will design and develop systems that can handle vast data scales, ensuring efficient securi ...

    Python Software Engineer – AI Security Platform (Hybrid London)

    Darktrace is seeking a Specialist Software Engineer in London to lead the prototyping and development of AI security features. This hybrid position allows for work from home while requiring at least two days in the London office. Responsibilities include collaborating with teams to develop and advance projects, ...

    Command & Control Software Engineer — Hybrid, UK Security Clear

    Energy Jobline CVL is seeking a highly capable Software Engineer for their Bristol facility to develop solutions for Air Defence Systems. The role mainly involves designing and developing Command and Control architectures, collaborating with cross-functional teams, and ensuring effective documentation. <p ...

    Senior Software Engineer Security Cleared, Secure Cloud Native

    A leading digital products company in the UK is looking for Senior and Principal Engineers to design secure, scalable software in agile teams. Applicants must hold active or recently active SC or DV clearance and possess strong experience in delivering production systems. Proficiency in modern programming langua ...

    Engineering Manager

    Gravitee is a 2025 Gartner® Magic Quadrant™ Leader, on a mission to govern the world’s intelligence. We deliver the industry’s most advanced platform for Any API, Any Event, and Any AI Agent, trusted by global leaders such as Michelin, Roche, and Blue Yonder. Why join us? T ...

    Senior Application Builder, Ring Application Services

    The Ring team is looking for a passionate and talented Senior Application Builder who has experience building world-class Android mobile apps and the ability to design, build, and maintain scalable cloud-based backend systems. You will be responsible for developing mobile applications and cloud services that int ...

    Senior Application Builder, Ring Application Services

    The Ring team is looking for a passionate and talented Senior Application Builder who has experience building world-class Android mobile apps and the ability to design, build, and maintain scalable cloud-based backend systems. You will be responsible for developing mobile applications and cloud services that int ...

    Backend Software Engineer SaaS Remote (Northern Ireland)

    Senior Backend EngineerMy client, an established SaaS company operating in the creative technology space, is hiring a Senior Backend Engineer to join their growing remote-first engineering team. This is a newly created position offering significant ownership across backend architecture, infr ...

    Java Developer / AI Engineer Design & Build Payment Product / Fintech / Banking

    Senior Java Developer / AI Engineer - Design & Build Payment Product / Fintech / Banking. Spring Boot, Claude/Codex also essential. ANY PAYMENT PRODUCT CONSIDERD from Current Account OR SAVINGS OR ISA's OR Fixed Term Deposits, Lending etc. £600-£650/DAY OUTSIDE IR35 PAY. Our Fintech Challenger Bank cli ...

    Graduate Java Developer

    Graduate Java Developer📍 Location: Near Ipswich, Suffolk (4 Days Office / 1 Day Remote)💰 Salary: £30,000-£35,000 + BenefitsThe OpportunityMploy Group is partnering with a growing software company developing innovative SaaS solutions used by organisations across the UK and internationa ...

    Hybrid Test Automation Engineer API/UI & CI/CD

    Test Automation Engineer Salary: Up to £60,000 + Bonus + Benefits Location: Belfast - Hybrid (2-3 days per week onsite) Working Hours: 40 hours per week - Full time Job Type: Permanent A globally e ...

    Test Automation Engineer up to £60,000 + Bonus Hybrid

    Test Automation Engineer Salary: Up to £60,000 + Bonus + Benefits Location: Belfast - Hybrid (2-3 days per week onsite) Working Hours: 40 hours per week - Full time Job Type: Permanent A globally e ...

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