9 contract java developer jobs found

Contract Senior Java Developer – Data Up to £700 per day Outside IR35 (6 month rolling) In office – City of London Quant Capital is hiring for a small, high-performing market maker in London. This is a junior-to-mid role focused primarily on Java development, with a secondary responsibility owning straightforward Python ETL/data ingestion into AWS and PostgreSQL. This is a growing team focused on data ingestion and building tooling for the wider firm. What you’ll do: Build and enhance Java backend services (APIs, batch jobs, integrations) used across the business Write clean, testable code with solid engineering discipline (testing, code review, debugging, production support) Maintain and extend Python-based ingestion/ETL (pragmatic plumbing, not heavy data engineering) Work with PostgreSQL (schemas, migrations, performant queries, data validation) Improve service reliability: monitoring/logging, sensible alerting, and predictable deployments via CI/CD...

Java Developer - SC Cleared Location: London (1–2 days onsite per month) Contract: Outside IR35 Rate: £600–£675 per day Duration: 12 Month Contract Start: Immediate / Short Notice Preferred Eligibility: Active SC Clearance required (DV clearance ideally) Overview An experienced Java Developer is required to build and maintain scalable, high-performance applications within a secure public sector environment. Requirements Strong experience with Java & Springboot Solid Java back-end development experience Experience working in public sector Strong understanding of API integration and system design Active SC Clearance required (DV clearance ideally)

Full Stack Developer (React / TypeScript / Java) Location: London (1–2 days onsite per month) Contract: Outside IR35 Rate: £650–£700 per day Duration: 12 Month Contract Start: Immediate / Short Notice Preferred Eligibility: Active SC Clearance required (DV clearance ideally) Overview An experienced Full Stack Developer is required to build and maintain scalable, high-performance applications within a secure public sector environment. The role requires a 50/50 split across front-end and back-end development . Requirements Strong experience with React and TypeScript Solid Java back-end development experience Experience working in a full stack capacity (approx. 50/50 front-end/back-end) Strong understanding of API integration and system design Active SC Clearance required (DV clearance ideally)

Java Developer - SC Cleared Location: London (1-2 days onsite per month) Contract: Outside IR35 Rate: £600-£675 per day Duration: 12 Month Contract Start: Immediate/Short Notice Preferred Eligibility: Active SC Clearance required (DV clearance ideally) Overview An experienced Java Developer is required to build and maintain scalable, high-performance applications within a secure public sector environment. Requirements Strong experience with Java & Springboot Solid Java Back End development experience Experience working in public sector Strong understanding of API integration and system design Active SC Clearance required (DV clearance ideally)

Full Stack Developer (React/TypeScript/Java) Location: London (1-2 days onsite per month) Contract: Outside IR35 Rate: £650-£700 per day Duration: 12 Month Contract Start: Immediate/Short Notice Preferred Eligibility: Active SC Clearance required (DV clearance ideally) Overview An experienced Full Stack Developer is required to build and maintain scalable, high-performance applications within a secure public sector environment. The role requires a 50/50 split across Front End and Back End development . Requirements Strong experience with React and TypeScript Solid Java Back End development experience Experience working in a full stack capacity (approx. 50/50 Front End/Back End) Strong understanding of API integration and system design Active SC Clearance required (DV clearance ideally)

Senior Full Stack Developer | Public Sector | Outside IR35 Contract: Outside IR35 Rate: £450-500/day Duration: ASAP start, 6 months initially Location: Fully remote (UK-based only) Clearance: Must be eligible for SC Sector: UK Government/Public Sector experience essential I'm supporting a consultancy delivering digital services into the UK public sector and we're looking for a Senior Full Stack Developer to join the team on a contract basis. This is a hands-on senior role working across the full software development life cycle. You'll design, build, and maintain robust full stack applications within AWS, contributing to architectural decisions and ensuring solutions meet government standards for security, accessibility, and performance. You'll work closely with product, design, and engineering colleagues in an agile delivery environment. Essential Experience Strong hands-on experience with Java (Kotlin) Backend development - Node.js Front End -...

CONTRACT SENIOR SOFTWARE ENGINEER - eDV CLEARED NEW CONTRACT JOB OPPORTUNITY AVAILABLE WITHIN A LEADING NATIONAL SECURITY COMPANY FOR A SENIOR SOFTWARE ENGINEER WITH eDV CLEARANCE Contract job opportunity for a Senior Software Engineer Globally leading defence / cyber security company £500 - £750 per day (inside and outside IR35 roles available) London based organisation in an easily accessible location Contract Senior Software Engineer To apply please call or email WHO WE ARE? We are recruiting multiple contract Senior Software Engineers to work with various clients in London ranging from R &D companies, Multi-National Consultancies to SME 's and product based companies. Due to the nature of the work these clients do, you must hold enhanced DV Security Clearance. WHAT WILL THE SENIOR SOFTWARE ENGINEER BE DOING? As a Senior Software Engineer, you will work with an experienced agile team to design and deliver...

Fullstack Developer – Palantir Foundry job in London – £750 - £1000 a day – London – Outside IR35 Hexwired Recruitment is recruiting for an expanding Solutions provider, now seeking Data Engineers and Fullstack Developers with solid experience working on Palantir Foundry’s data analytics dashboard. You will be working on the full product lifecycle for a range of customers within Finance, energy and more. The successful candidate must have good experience on both the API development and backend data management side of Palantir’s products. Initial 3 months with very likely extension. Outside IR35 and will require at least 3 days onsite. Key Skills: Bachelors in CS, Maths, Physics or similar 3+ commercial Palantir Foundry dashboard experience Solid experience building applications using Palantir Foundry Excellent Data Engineering experience using Palantir Foundry Company is agnostic on programming languages, Python, Java, Typescript and/or React...

Contract: 12 Months Day Rate: £500 per day (Outside IR35) Clearance: SC Eligible Sector: UK Public Sector Location: Fully Remote (UK-based) Start Date: ASAP Overview We are seeking an experienced Mobile Architect to support a large-scale public sector digital transformation programme. The successful candidate will lead mobile solution architecture across iOS and Android, ensuring scalable, secure, and high-performing mobile services. This is a key role within a modern engineering environment, working closely with product teams, developers, and senior stakeholders. Key Responsibilities Lead the end-to-end mobile architecture across iOS and Android platforms. Define architectural standards, best practices, and technical direction. Work closely with development teams to ensure architectural alignment and technical quality. Provide guidance on native mobile frameworks, patterns, APIs, and tooling. Ensure solutions meet public sector standards around...