Backend Java Developer Contract Jobs in London, UK

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Backend Java Developer Contract

Join a remote-first team as a contract Backend Developer, where you'll take ownership of key technical decisions, collaborate with cross-functional teams, and contribute to an exciting project in the independent music space. Enjoy flexibility, growth opportunities, and a supportive culture. What’s I ...

Java Backend Developer

# Java Backend Developer,November 30, 2025### Job Description**On behalf of our client, we are seeking a Java Backend Developer – London, UK (Full-Time Permanent Role).**Our client, a fast-growing technology organisation, is looking for a skilled Java Backend Developer to build secure, scalable backend services ...

Java Backend developer

We are looking for an experienced Backend Developer with strong Java skills to build and maintain scalable, high-performance backend services and APIs for a large microservices-based trading platform. Key Responsibilities Develop and maintain backend services and API ...

Backend Java Developer

6-Month Initial Contract | £700–£900 per day Inside IR35 Senior Java Backend Engineer Hybrid | 2 Days per Month in London Our client is looking for experienced Senior Java Backend Engineers to join high-performing engineering squads working on modern, cloud-n ...

Java Backend Developer

Location: London Job Type: Contract Industry: Engineering Job reference: BBBH437302_1778850078 Posted: about 5 hours ago Senior Backend Java Engineer (SC)Location: Fully Remote Contract: 6 Months IR35 Status: Inside IR35We are currently seeking a Senior Backend ...

Java Backend Developer

Location: London Job Type: Contract Industry: Engineering Job reference: BBBH437302_1778850078 Posted: about 5 hours ago Senior Backend Java Engineer (SC)Location: Fully Remote Contract: 6 Months IR35 Status: Inside IR35We are currently seeking a Senior Backend ...

Senior Java Backend Developer

MrQ is an award‑winning online casino launched in 2018. We’re big on tech, performance, and creating a best‑in‑class player experience. Our growth has been rapid, and we’re building a platform that can scale globally—this requires engineers who can operate at both depth and system‑wide impact. Sen ...

Backend Java Developer Public Sector

Introduction At IBM Consulting UK FutureNow, you'll build a career at the forefront of hybrid cloud and AI, working with leading clients across the public and private sectors. You'll collaborate with top industry professionals, gain hands on experience with cutting edge technologies, and ...

Backend Java Developer Public Sector

Introduction At IBM Consulting UK FutureNow, you’ll build a career at the forefront of hybrid cloud and AI, working with leading clients across the public and private sectors. You’ll collaborate with top industry professionals, gain hands on experience with cutting edge technologies, and ...

Backend Java Developer Public Sector

**Introduction**At IBM Consulting UK FutureNow, you'll build a career at the forefront of hybrid cloud and AI, working with leading clients across the public and private sectors.You'll collaborate with top industry professionals, gain hands on experience with cutting edge technologies, and deliver so ...

Backend Java Developer – London Freelance

Job descriptionContextThis digital product is part of a high-growth strategic pillar dedicated to digital expansion. It is a critical solution enabling product sales through a diverse network of external channels (general marketplaces, social commerce, quick-commerce). The platform i ...

Backend Java Developer – London Freelance

Job descriptionContextThis digital product is part of a high-growth strategic pillar dedicated to digital expansion. It is a critical solution enabling product sales through a diverse network of external channels (general marketplaces, social commerce, quick-commerce). The platform i ...

Remote Backend Java Developer — Ownership & Growth

Join a remote-first team as a contract Backend Developer, where you'll take ownership of key technical decisions, collaborate with cross-functional teams, and contribute to an exciting project in the independent music space. Enjoy flexibility, growth opportunities, and a supportive culture. What’s I ...

Lead Backend Developer Python Java AWS

21 hours ago Be among the first 25 applicants This range is provided by Client Server. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more. Base pay range Direct message the job poster from Client Server Tech Recruiter - Software ...

Backend Developer (Kotlin/Java), UK – CIMAR

Company Overview CIMAR UK Ltd, now a part of DeepHealth, is a leading provider in the SaaS (Software-as-a-Service) healthcare sector, specialising in advanced cloud-based image management solutions. Our technology empowers healthcare organisations to optimise image management processes, enhance pa ...

Lead Backend Developer Java, AWS & Kubernetes

A leading music company is seeking a Lead Developer to design, develop, and maintain external-facing royalty portals using Java. The role involves building AWS serverless solutions, working with Docker and Kubernetes, and providing technical leadership within the development team. Candidates should have strong e ...

Contract Software Developer: Java, SQL & JS

Work Day Extend London, United Kingdom Posted 12 months ago Tech stack JSON Java SQL Git JavaScript General skills Java would also be good Javascript SQL J ...

Backend Java Developer – Data Fabric / Platform Engineering

Backend Java Developer – Data Fabric / Platform Engineering Location: London (Hybrid)Employment: PermanentSalary: £70,000 – £90,000 base (dependent on experience) If your idea of backend engineering is more than CRUD APIs and microservices boilerpla ...

Backend Java Developer Public Sector | Flexible Work

IBM is seeking a Backend Java Developer in the Greater London area to design and deliver high-quality applications using Java/JEE and modern web technologies. You will develop secure, reliable backend solutions, collaborate with technical teams, and contribute to DevOps practices. The role offers benefits such a ...

Java Backend Developer AI Powered APIs (Remote)

YO IT Consulting is seeking a Java Developer - AI Expert for a part-time remote role. You will design, implement, and improve backend APIs while collaborating with AI research teams. Responsibilities include optimizing REST and GraphQL endpoints, ensuring API security, and participating in testing of AI-powered ...

Java Full Stack Developer | Frontend & Backend Engineer

Java Script Works, located in Greater London, is looking for a skilled Java Full Stack Developer. The ideal candidate should be proficient in Java for back-end development and experienced in front-end technologies like HTML, CSS, and JavaScript, alongside frameworks such as React or Angular. Responsibilities inc ...

Backend Java Developer – Data Fabric / Platform Engineering

Backend Java Developer – Data Fabric / Platform Engineering Location: London (Hybrid)Employment: PermanentSalary: £70,000 – £90,000 base (dependent on experience) If your idea of backend engineering is more than CRUD APIs and microservices boilerpla ...

Senior Java Backend Engineer Remote 6 Month Contract

Binance, a leading blockchain ecosystem, is seeking a Software Backend Engineer to enhance Kazakhstan services. This remote position requires at least 7 years of experience in software development, with strong skills in Java and backend frameworks. Responsibilities include designing and maintaining backend syste ...

Senior Java Backend Engineer Hybrid, 6 Month Contract

A tech recruitment firm in the UK is seeking an experienced Java Developer for a hybrid position, requiring one day per month in the London office. The role is an initial 6-month contract focused on developing and enhancing scalable backend systems. Candidates should have strong experience in Java, solid underst ...

Backend Java Engineer

Software Engineer (Java) Are you passionate about building software solutions that engage millions of sports fans worldwide? Do you want to work in a collaborative environment, building cutting‑edge technology that powers web and native applications across the sports industry? If so, we w ...

Java Backend Lead

Eeze is a Malta-based, technology-driven company that has been developing world-leading online gaming platforms and solutions since 1999. Underpinned by a history that directly interconnects with the rise of online gambling, the company has been a key pioneer within the international market. Over the years ...

Backend Java Engineer

Java Engineer – Backend & Search Platform Location: London, UK PLEASE NOTE SPONSORSHIP IS NOT PROVIDED FOR THIS ROLE - MUST HAVE FULL RIGHT TO WORK IN THE UK About the Role You’ll be working on a large‑scale backend platform that powers advanced search, data proc ...

Backend Java Engineer

AMS is a global workforce solutions partner committed to creating inclusive, dynamic, and future‑ready workplaces. We help organisations adapt, grow, and thrive in an ever‑evolving world by building, shaping, and optimising diverse talent strategies. Our Contingent Workforce Solutions (CWS) is one ...

Backend Java Engineer

Java Engineer – Backend & Search PlatformLocation: London, UK**PLEASE NOTE SPONSORSHIP IS NOT PROVIDED FOR THIS ROLE - MUST HAVE FULL RIGHT TO WORK IN THE UK **About the RoleYou’ll be working on a large‑scale backend platform that powers advanced search, ...

Backend Java Engineer

Java Engineer – Backend & Search PlatformLocation: London, UK**PLEASE NOTE SPONSORSHIP IS NOT PROVIDED FOR THIS ROLE - MUST HAVE FULL RIGHT TO WORK IN THE UK **About the RoleYou’ll be working on a large‑scale backend platform that powers advanced search, ...

Backend Developer Web/Game Infrastructure (Contract) PRELOADED

Contract: (Hybrid/Remote) Overview We’re seeking a seasoned Backend Developer with a proven track record in building scalable and robust architectures, and an instinctive understanding of how to deliver seamless digital experiences. You will work closely with the game team and tec ...

Backend Developer Web/Game Infrastructure (Contract) PRELOADED

Contract: (Hybrid/Remote) Overview We're seeking a seasoned Backend Developer with a proven track record in building scalable and robust architectures, and an instinctive understanding of how to deliver seamless digital experiences. You will wor ...

Backend Developer Web/Game Infrastructure (Contract) PRELOADED

Contract: (Hybrid/Remote) Overview We're seeking a seasoned Backend Developer with a proven track record in building scalable and robust architectures, and an instinctive understanding of how to deliver seamless digital experiences. You will wor ...

Senior Java Developer FinTech Office London Contract

Adaptive is a financial consulting firm that partners with capital, commodity, and digital market participants. We value differentiation through technology, designing and delivering complex front‑office technology solutions. Our clients include leading investment banks and fintech providers. Offices are lo ...

Front End Java Developer — 3 Month Contract

Onyx-Conseil is seeking a Front End Developer with Java expertise for a 3-month assignment in Central London. Ideal candidates should have 3 to 5 years of established development experience, particularly with skills in HTML, CSS, JavaScript, and AJAX. The role involves creating responsive web applications and ma ...

Backend Developer

Overview Location: City Of London, England, United Kingdom We are seeking an experienced Backend Developer to design, develop, and maintain scalable backend services and REST APIs using Python and Node.js. You will work closely with product, front-end, and DevOps teams to deliver high-performa ...

Backend Developer

Fogsphere is a London‑based innovator focused on transforming workplace and urban safety through advanced AI, Computer Vision, and Industrial IoT. Built on a principled “Edge‑to‑Fog‑to‑Cloud” architecture, our platform turns passive CCTV cameras and sensors into proactive hazard detectors, capable of ident ...

Backend Developer

About Us At Octopus we're passionate about powering a sustainable future. As pioneers in the renewable energy space, we don’t just invest in utility scale projects; we invest in people, communities and a greener tomorrow. We're on a mission to transform the renewable energy generation spa ...

Backend Developer

# Backend DeveloperSenior LevelLondonPosted 8 days ago### Role OverviewWe are heavily recruiting a Senior Backend Developer to spearhead our core infrastructure in London. Central to this role is the expert development of robust server-side logic, sophisticated e-commerce API systems, and high-stakes database ha ...

Backend Developer

Ready join our 130,000 colleagues and support our mission to make people and places the bestthey can be? Be the difference today, connect with our careers team to learn more. Join The Team We always have vacancies for enthusiastic, talented and loyal people to fill roles within our team. Jo ...

Backend Developer

Job Description As a Specialist II in Backend Development, you will leverage your expertise in Java 17/21 and Java EE library migrations to enhance and upgrade middleware systems. Your role will involve working with Oracle 19C databases and ensuring seamless SOAP/REST integration. Key Resp ...

Backend Developer

London, United Kingdom | Posted on 27/05/2026 About Scrumconnect Consulting Scrumconnect Consulting is a multi-award-winning digital consultancy, recognised for delivering impactful and innovative technology solutions across UK government departments. Our work has positively influenced the lives of ove ...

Backend Java Engineer Kazakhstan/Russian speaker (6 months Contract)

Binance is a leading global blockchain ecosystem behind the world’s largest cryptocurrency exchange by trading volume and registered users. We are trusted by 300+ million people in 100+ countries for our industry-leading security, user fund transparency, trading engine speed, deep liquidity, and an unmatch ...

Java Developer

Location: UK (Hybrid / Onsite as required) Experience: 2–5 years Role Type: Fixed Term Contract Overview We are building a modern Data Fabric platform that enables the ingestion, transformation, and serving of large volumes of data as high‑quality, reusable data products f ...

Java Developer

Location: UK (Hybrid / Onsite as required) Experience: 2–5 years Role Type: Fixed Term Contract Overview We are building a modern Data Fabric platform that enables the ingestion, transformation, and serving of large volumes of data as hig ...

Java Developer

Overview Role: Java Developer Location: We operate a hybrid schedule, meaning twice monthly in the office based in central London Salary: £ DOE plus extensive benefits Contract type: Permanent Employment type: Full time ...

Java Developer

We are looking for a Mid-LevelJava / .NET Developerwith strong Azure experience to contribute to the delivery of digital services for the public sector.You'llwork as part of a collaborative team building solutions that serve citizens, writing clean, well-tested code and growing your skills in a supportive ...

Java Developer

Discover your future at Citi Working at Citi is far more than just a job. A career with us means joining a team of more than 230,000 dedicated people from around the globe. At Citi, you’ll have the opportunity to grow your career, give back to your community and make a real impact. Overview ...

Java Developer

We are seeking specialist Java engineers with experience working on high performance/low latency systems. We’re working with banks and other major financial institutions on projects where microseconds count. Essential functions Build and maintain Java applications in banking and tradin ...

Java Developer

Overview A Java Developer role with Commerzbank AG via LevelUP HCS, based in London. A leading corporate banking and capital markets organisation is seeking a Java Developer to join their team. Company Description Commerzbank is a leading international commercial ban ...

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    Backend Java Developer Contract Jobs in London Job Search Guide, Trends and Insights