23 of 23 Contract Java Developer Jobs in the UK

Java Developer Hybrid (Belfast) | 6-Month Contract | Inside IR35 Our client, a leading organisation within the financial services sector, is seeking an experienced Java Developer to join their Belfast-based technology team on an initial 6-month contract (Inside IR35). This is an excellent opportunity to work on high-performance, data-driven applications within a … fast-paced enterprise environment. The successful candidate will play a key role in developing and optimising complex batch processing and integration systems using Java 17, Spring Batch, Spring Integration, and GridGain Database. Key Responsibilities Design, develop, and maintain scalable Java 17 applications for enterprise data processing. Build and optimise batch processing solutions using Spring Batch. Design and implement … deployment and operational tasks in Unix/Linux environments. Collaborate with cross-functional technical and business teams to deliver high-quality, reliable solutions. Skills & Experience Required Strong proficiency in Java 17, including modern Java features and best practices. Proven experience with Spring Batch and Spring Integration. Solid understanding of Unix/Linux scripting and SQL. Hands-on experience More ❯

We’re looking for a Senior Java Developer for our public sector client based in Leeds on an initial 12-month contract paying up to £700 per day Inside IR35. This role allows hybrid working with an expectation to attend the office 3 days per week. You will need to either hold current BPSS clearance or have the … ability to pass it, and be eligible for SC clearance. The successful Senior Java Developer will possess proven skills working with the following – Java 21 (or later) Test Driven Development (TDD) and Behaviour Driven Development (BDD) Large microservice architectures Agile environments and pair programming Implementing APIs for internal and external use Building automated test suites in CI … have: Jackson, JAX-RS, Mockito ActiveMQ or Kafka MongoDB or other NoSQL/document databases Experience scaling high-traffic websites and handling large data sets Interested? Please apply below. Java Software Engineer, Java, Java 21, Microservices, TDD, BDD, Agile, APIs, CI/CD, Leeds, Government, Public Sector, Developer, Contract, Inside IR35 More ❯

Low Latency Java Developer - FX options - Inside IR35 Central London - Hybrid - 3 days on site, 2 days remote 12 months Brief Our client is seeking a Low Latency Java Developer with hands-on experience in FIX protocol integration to join their FX Options technology team. You will play a hands-on role in modernising and optimising … the trading platform , delivering ultra-low latency solutions for front-office trading and risk management. Key Responsibilities Develop, optimise, and maintain low latency Java-based trading systems Implement and maintain FIX protocol connectivity for FX Options trading Work closely with Quants, Traders, and Risk teams to translate business requirements into high-performance solutions Take ownership of the end-to … and provide technical leadership within the development team Collaborate with cross-functional teams on architecture, design, and deployment of trading solutions Required Skills 5-10 years' experience as a Java Developer in front-office or trading environments Strong Java Core , multi-threading , and concurrent programming experience Proven experience with low latency system design and optimisation Hands-on More ❯

Low Latency Java Developer - FX options - Inside IR35 Central London - Hybrid - 3 days on site, 2 days remote 12 months Brief Our client is seeking a Low Latency Java Developer with hands-on experience in FIX protocol integration to join their FX Options technology team. You will play a hands-on role in modernising and optimising … the trading platform , delivering ultra-low latency solutions for front-office trading and risk management. Key Responsibilities Develop, optimise, and maintain low latency Java-based trading systems Implement and maintain FIX protocol connectivity for FX Options trading Work closely with Quants, Traders, and Risk teams to translate business requirements into high-performance solutions Take ownership of the end-to … and provide technical leadership within the development team Collaborate with cross-functional teams on architecture, design, and deployment of trading solutions Required Skills 5-10 years' experience as a Java Developer in front-office or trading environments Strong Java Core , multi-threading , and concurrent programming experience Proven experience with low latency system design and optimisation Hands-on More ❯

Java Developer Location: London (Office-Based, 3 Days per Week) Duration: 6 Months Day Rate: £510 Inside IR35 Start Date: ASAP The Role We are seeking an experienced Java Developer to join a leading organisation in London. You will design, develop, and maintain full stack web applications, working across both front-end and back-end technologies … to deliver secure, high-performing, and scalable solutions. Core Responsibilities * Develop and maintain applications using Java, Spring Boot, and Hibernate. * Design and implement RESTful APIs and microservices. * Build responsive interfaces using HTML, CSS, JavaScript, and frameworks such as React, Angular, or Vue.js. * Manage relational and NoSQL databases. * Support CI/CD pipelines, containerisation (Docker, Kubernetes), and cloud deployments on … or GCP. * Collaborate within Agile teams, using Git for version control and following best practices in security, testing, and code quality. Your Profile Essential Skills & Experience * Strong proficiency in Java and object-oriented programming. * Expertise with Spring Framework, REST APIs, and ORM tools. * Solid understanding of web technologies, security, and performance optimisation. * Experience with testing frameworks such as JUnit More ❯

Java Developer Hybrid (Belfast) 6-Month Contract Inside IR35 Our client, a leading organisation within the financial services sector, is seeking an experienced Java Developer to join their Belfast-based technology team on an initial 6-month contract (Inside IR35). This is an excellent opportunity to work on high-performance, data-driven applications within a More ❯

Java Developer Location: London (Office-Based, 3 Days per Week) Duration: 6 Months Day Rate: £510 Inside IR35 Start Date: ASAP The Role We are seeking an experienced Java Developer to join a leading organisation in London. You will design, develop, and maintain full stack web applications, working across both front-end and back-end technologies More ❯

Role: Java Developer Location: Hybrid travel to client site 2-3 days per week. Rate Outside IR35: £500.00 - £550.00 Clearance: Active SC Clearance (Must hold Active SC) We are seeking an experienced and hands-on Java Developer with a strong understanding of Java to join our team. The ideal candidate will have a solid background … reporting in the event of delays, proactively manage dependencies, and work with team members to resolve issues impacting delivery. Required Qualifications: - Minimum of 3 years of experience as a Java Developer. - Strong understanding of functional programming principles and Test-Driven Development (TDD). - Experience with relational and NoSQL databases. - Familiarity with cloud platforms such as AWS, Azure, or GCP. More ❯

Role: Java Developer Location: Hybrid travel to client site 2-3 days per week. Rate Outside IR35: £500.00 - £550.00 Clearance: Active SC Clearance (Must hold Active SC) We are seeking an experienced and hands-on Java Developer with a strong understanding of Java to join our team. The ideal candidate will have a solid background More ❯

We are urgently seeking a highly skilled SC Cleared Java Backend Developer to join a critical project with a high-profile Government Client . This is a key technical role focusing on a vital component of the client's technology landscape: migrating a legacy message queueing system to a modern, scalable platform. ?? Key Requirements & Scope: The core objective … role is to replace the existing IBM MQ Series with Kafka across the platform. We are therefore looking for a rare and specific combination of skills: Deep expertise in Java (Backend Development). Strong, hands-on experience with Kafka (implementation, configuration, and integration). Essential knowledge of IBM MQ Series (or similar legacy messaging systems) to facilitate a seamless … integration. Ability to work in a fast-paced environment and deliver solutions to high government standards. Essential Criteria: Active SC (Security Check) Clearance is mandatory. Strong commercial experience with Java Backend Development. Proven experience with Kafka and IBM MQ Series migration projects. Excellent communication and problem-solving skills. Offer Details: Rate: £525 per day IR35 Status: Inside IR35 Location More ❯

Role: Java Developer Location: Remote Inside IR35 £550.00pd Must Hold Active SC Clearance We are seeking a JBOSS Developer to join our team. In this role, you will have the opportunity to work closely with stakeholders and team members while leveraging your expertise in Red Hat JBoss Enterprise Application Platform and alternative J2EE Application Servers. Key Skills … with the Authority team to refactor or redevelop existing application components currently dependent on JBoss to operate within the selected technology stack, including: - Remove backend functionality that requires proprietary Java where required. - Change front-end interactions that require proprietary Java to use the new solution where required. - Update and/or change authentication mechanisms (Keycloak) and remove the … and adapting appropriate software development methods, tools, and techniques. - Collaborate with the Authority project team to drive technical development across all stages and iterations of software development. Key Competencies: - Java - Java Enterprise Editions (JEE) - Keycloak More ❯

Harvey Nash have an urgent requirement for a Java Developer for a public sector client in Edinburgh. Please note this is an urgent 10 week contract starting ASAP. Outside of IR35 £400 a day Two days a week onsite in Edinburgh Candidates must have a valid Disclosure Scotland check The Role Upgrade our clients application from Spring 2.5 … and Spring Security 2.0.8 to Spring Framework 5.3.x and Spring Security 5.8.x. We are looking for the following experience: Strong legacy Spring migration/remediation experience. Experienced Java development (Java 8/11/17). Spring Framework (MVC, transactions, Security). Proven migration experience from Spring 2.x/3.x ? 5.x/6.x Hibernate/JPA, including upgrade More ❯

We are urgently seeking a highly skilled SC Cleared Java Backend Developer to join a critical project with a high-profile Government Client . This is a key technical role focusing on a vital component of the client's technology landscape: migrating a legacy message queueing system to a modern, scalable platform click apply for full job details More ❯

Lead Developer - Live Services Java Patching Rate: £508 per day Start Date: 24th November (TBC) Location: Remote/On-site as required Telford Security Clearance: Active SC preferred due to timescale of the project We are seeking an experienced Lead Java Developer to oversee and deliver a critical Live Services Java Patching Programme within Central … Government. This role involves upgrading legacy Java applications to meet contractual and compliance requirements, ensuring continued stability, performance, and security across live environments. The successful candidate will take a leading role in planning, coordinating, and executing the patching exercise, working closely with a small development team and key stakeholders to deliver high-quality outcomes. Key Responsibilities: Lead the end … to-end Java patching and upgrade process for live Central Government services. Ensure all upgrades meet technical, contractual, and security compliance standards. Collaborate effectively with development teams, project managers, and service owners. Provide technical leadership, mentoring, and quality assurance within the team. Maintain comprehensive documentation and reporting throughout the upgrade lifecycle. Essential Skills and Experience: Proven expertise in Java More ❯

Fidessa Developer - Java/Spring - sought by investment bank based in London - Contract - Hybrid *inside IR35* Key Responsibilities Develop and customise the Fidessa cash equities order management systems for US and Canadian markets. Translate business requirements into technical solutions using Fidessa and Java. Collaborate with global teams to deliver high-quality solutions. Provide mentorship to new team members … line technical issues as needed. Essential Skills & Experience 5+ years of hands-on development experience with the Fidessa trading platform . Strong understanding of equities trading . Proficiency in Java (including Spring framework) and Python . Excellent interpersonal, communication, and organisational skills. Desirable Skills Knowledge of other asset classes in Capital Markets. Experience with tools such as GitHub, Maven More ❯

Fidessa Developer - Java/Spring - sought by investment bank based in London - Contract - Hybrid *inside IR35* Key Responsibilities Develop and customise the Fidessa cash equities order management systems for US and Canadian markets. Translate business requirements into technical solutions using Fidessa and Java. Collaborate with global teams to deliver high-quality solutions. Provide mentorship to new team members … line technical issues as needed. Essential Skills & Experience 5+ years of hands-on development experience with the Fidessa trading platform . Strong understanding of equities trading . Proficiency in Java (including Spring framework) and Python . Excellent interpersonal, communication, and organisational skills. Desirable Skills Knowledge of other asset classes in Capital Markets. Experience with tools such as GitHub, Maven More ❯

We are a Global Recruitment specialist that provides support to the clients across EMEA, APAC, US and Canada. Role Title: Java Developer Location: Farnborough Duration: 31/12/2025 Work setup: 3 days onsite Rate : £322/hr on umbrella Role Description: Have experience working with Java 17 or later Have experience working in Spring ecosystem More ❯

Core Java Developer working in a distributed, high volume, low-latency, multi-threaded event processing platform, developing in Linux, large scale and fault tolerance systems. Must have enterprise environment experience and strong algorithmic problem solving ability, working on Real Time calculation engine related components. The role will adhere to best software engineering practices/risk management, requiring strong More ❯

I am looking to speak to Java Developers, in relation to a 12 months contract on a high profile transformation programme. This is a long-term assignment on one of the most challenging programmes across the Public Sector, and it's not an understatement to say your work will impact the lives of millions across the UK. Details need … to remain vague, due to the nature of the assignment, however the central requirements are: 5+ years as a Java Developer Microservice architecture Database management Eligible for an SC Clearance, ideally Active for a quicker start Call me, Alex Manea, at NonStop Recruitment now for a confidential conversation. Contact me on a.manea@nonstopconsulting .com or +, please send More ❯

Role: Java Developer Location: Remote Inside IR35 £550.00pd Must Hold Active SC Clearance We are seeking a JBOSS Developer to join our team. In this role, you will have the opportunity to work closely with stakeholders and team members while leveraging your expertise in Red Hat JBoss Enterprise Application Platform and alternative J2EE Application Servers click apply More ❯

Senior Java Engineer Location: London (1-2 days a week in the office, mandatory on Thursdays) Experience: Minimum 8-10 years Technical Skills: Proficiency in Java 8 (transitioning to Java 17) Retail banking experince Python Experience with Spring Boot 2.4 and above Knowledge of Continuous Integration Apigee Java Testing API experience If all the above skills More ❯

I am recruiting for a number of Senior Java Developers to work in Leeds 3 days a week, 2 days remote. The role falls inside IR35 so you will be required to work through an umbrella company. I am searching for outstanding skills and someone who must be ready to quickly get to work within an Agile, multidisciplinary team … you will be an integral part of that team in designing, creating and improving new and existing products, platforms and transactions across government. Candidates must have recent experience with Java 21 (or later). An excellent understanding of TDD and BDD and large microservice architectures is essential. You will have experience of working in an Agile environment and be More ❯

JavaDeveloperInvestmentBankingClient Location: Glasgow(Hybrid,3daysperweekon-site) Contract: 6-MonthInitialContract(InsideIR35) Overview: Ourleadinginvestmentbankingclientisseekinganexperienced JavaDeveloper tojointheirhigh-performingengineeringteaminGlasgow.Thisisafantasticopportunitytoworkwithinaglobalfinancialenvironment,contributingtothedesign,development,andoptimisationofcomplex,high-volumesystemsthatunderpintradingandriskoperations. Youllcollaboratewithglobalteamstodeliverscalable,reliable,andsecuresoftwaresolutionswhileensuringalignmentwitharchitecturalandregulatorystandards. KeyResponsibilities: Design,develop,andmaintainrobustJava-basedapplicationsusedacrosstradingandriskmanagementplatforms. Workwithcross-functionalteamstodeliverefficient,maintainable,andwell-testedcode. Optimiseapplicationperformanceandensureadherencetosecurityandcompliancerequirements. Participateincodereviews,architecturediscussions,andcontinuousimprovementinitiatives. Supportintegrationwithdatabases,APIs,andinternalsystems. Troubleshootproductionissuesandprovidetimelyresolutions. KeySkills&Experience: StrongcommercialexperienceinJava11orabove(Java17preferred). ProficiencywithSpringFramework(SpringBoot,SpringBatch,SpringIntegration). Experiencewithmicroservices,RESTfulAPIs,andevent-drivenarchitectures. GoodunderstandingofSQLandrelationaldatabases(e.g.Oracle,PostgreSQL). ExposuretoUnix More ❯