1 to 25 of 43 Contract Java Developer Jobs

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 ❯

Senior Java Developer/Low-Latency Developer Central London - Hybrid - 3 days on site, 2 days remote Inside IR35 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 … 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 ❯

Senior Java Developer/Low-Latency Developer Central London - Hybrid - 3 days on site, 2 days remote Inside IR35 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 … 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 ❯

Senior Full Stack Java Developer – Long-Term Contract • 12+ Month Engagement • Excellent Daily Rate Available • Galway/Hybrid Working (great flexibility) We’re partnering with a forward-thinking tech organisation in Galway to expand a high calibre engineering group. This is a long-term contracting opportunity where you’ll work with cutting-edge technologies, contribute to large-scale … ll play a key role in shaping how data moves, scales and powers real-world use cases across platforms. Your role Develop and optimise complex enterprise applications with modern Java tooling. Use Spring Boot, microservices architecture and cloud native tech to deliver robust, scalable solutions. Work closely with cross-functional Agile teams across design, engineering, and architecture. Explore emerging … tech — from distributed ledgers and digital asset workflows to AI-driven automation and advanced data pipelines. Your background 5+ years’ experience as a Java developer working on modern web or cloud-based systems. Strong skills in Java, microservices, Spring Boot, and cloud-native development. Bonus points for exposure to JavaScript/TypeScript frameworks like Angular or Node.js. 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 - Inside IR35 (2 Days On-site, Telford) Contract | Central Government Project | Hybrid Working Must be able to obtain SC We're seeking an experienced Java Developer to join a high-performing delivery team within a large-scale central government modernisation programme . You'll work as part of an Agile Scrum team made up … of Java Engineers, Front-End Developers, and Quality Engineers, contributing to the transformation of legacy systems into scalable, cloud-based services. Location: Telford (2 days on-site per week) Contract: Inside IR35 Sector: Central Government/Public Sector Duration: Ongoing contract Key Responsibilities Develop, enhance, and maintain Java-based microservices and APIs Build and test RESTful APIs using … high-quality software solutions Write clean, maintainable code following best practices in secure development Support continuous integration, testing, and deployment activities Essential Skills & Experience Strong hands-on experience with Java and Spring Boot Solid understanding of REST API development and JSON Proficiency in JUnit for unit testing Experience deploying microservices using Kubernetes Proven background working in complex technical environments More ❯

Backend Java Developer 12-Month Contract Onsite | Nenagh, Ireland | 5 Days per Week We're seeking an experienced Backend Java Developer to join our client's engineering team in Nenagh. This is an excellent opportunity to contribute to a high-transaction, enterprise-scale payment platform used globally. What You'll Do Develop and maintain secure, high … performance backend systems for payment processing. Design and optimise scalable microservices and APIs using Java, Spring, and Hibernate. Ensure systems meet strict non-functional requirements-scalability, availability, and performance. Collaborate across teams to integrate backend services with payment gateway components. Support the adoption of Nexo and other payment standards to future-proof the platform. Troubleshoot complex backend issues, perform … code reviews, and uphold engineering best practices. What You'll Bring 5+ years' experience as a Java Backend Developer in a high-transaction or enterprise environment. Strong skills in Java, Spring, Hibernate, and microservices architecture. Familiarity with payment systems, APIs, and protocols. A problem-solving mindset with excellent teamwork and communication skills. If you're passionate about More ❯

Backend Java Developer 12-Month Contract Onsite | Nenagh, Ireland | 5 Days per Week We're seeking an experienced Backend Java Developer to join our client's engineering team in Nenagh. This is an excellent opportunity to contribute to a high-transaction, enterprise-scale payment platform used globally. What You'll Do Develop and maintain secure, high … performance backend systems for payment processing. Design and optimise scalable microservices and APIs using Java, Spring, and Hibernate. Ensure systems meet strict non-functional requirements-scalability, availability, and performance. Collaborate across teams to integrate backend services with payment gateway components. Support the adoption of Nexo and other payment standards to future-proof the platform. Troubleshoot complex backend issues, perform … code reviews, and uphold engineering best practices. What You'll Bring 5+ years' experience as a Java Backend Developer in a high-transaction or enterprise environment. Strong skills in Java, Spring, Hibernate, and microservices architecture. Familiarity with payment systems, APIs, and protocols. A problem-solving mindset with excellent teamwork and communication skills. If you're passionate about 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 ❯

Contract Algo Trading Java Developer - eTrading, low latency, Java APIs, Multithreading, FIX Our Investment Banking client is looking for an Algo trading Java developer to join the team to work on new initiatives and support for business critical algorithmic trading engines. The team provides innovative solutions for low touch, low latency trading, which includes FIX … connectivity, low latency market connectivity, smart order routing, algorithmic trading and internal crossing. The requirement is for a core Java developer. The team is working on a number of algorithmic engines that support benchmark algos, smart order routing and internal crossing. The main responsibilities of this role include: Delivery of key functional changes to the ETT strategy engines Delivery … of core framework-level changes Interaction with quantitative trading group/quantitative traders to capture core requirements In depth understanding of core Java API's (collections, concurrency, NIO etc.) Have an understanding of and experience with multithreaded systems, working knowledge of the Java garbage collector, familiar with low latency I/O. Understanding of and experience with design 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 ❯

Were looking for a Senior Java Developer for our public sector client based in Leeds on an initial contract paying up to £700 per day Inside IR35 on an initial 12 month contract. This role requires 3 days per week in the office and applicants must hold or be eligible to obtain Security Clearance (SC) or hold a … engaging with stakeholders Driving the evolution of digital services and underpinning infrastructure Essential skills: Strong experience in one or both of the following: Modern software engineering for digital products (Java, microservices, Hexagonal architecture, MongoDB, Kafka) OR Cloud infrastructure, DevOps, and automation (AWS, Terraform, GitLab CI, Jenkins) Proven track record of leading engineering teams, providing technical guidance, coaching, and mentoring … control, assurance, secure design) Strong collaboration and ability to share knowledge within engineering communities Experience delivering in complex, multi-disciplinary environments to tight timescales Interested? Please apply below. Senior Java Developer, Technical Lead, Public Sector, Java, Microservices, AWS, Terraform, GitLab CI, Jenkins, MongoDB, Kafka, DevOps, Digital Services, Inside IR35, SC Cleared More ❯

Job title: Java Developer Location: Bournemouth, UK Job Type: Fixed Term Employment Fully Onsite Domain: Banking Job Details: Need 8+ Years Hands on experience Java Developer with Backend Experience Tools: Kubernetes AWS Mongo DB/No SQL More ❯

Job title: Java Developer Location: Bournemouth, UK Job Type: Fixed Term Employment Fully Onsite Domain: Banking Job Details: Need 8+ Years Hands on experience Java Developer with Backend Experience Tools: Kubernetes AWS Mongo DB/No SQL JBG81_UKTJ . click apply for full job details More ❯

Java Developer with Kubernetes, AWS, Mongo DB/No SQL Right attitude – lot of demand of this lately# 8-15 years’ experience 5 Days from Bournemouth office is mandatory Should Relocate or within commutable distance Banking experience 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 ❯

Full Stack Developer Java/Angular Location: Galway Model: Hybrid Term: 12+ months | Rate: Top-tier day rate Full Stack Java/Angular Developer required for a great long term contracting role with a leading organisation who have a large presence in Galway. You’ll work in modern technology department focussing on a small number of … enterprise projects. There’s scope and variety in the role with a range of modern tools, tech and processes. Desired Skills/Experience 5+ years Java development experience Solid exposure to Angular OR React, ideally at least a year of recent experience working with modern TypeScript libraries Familiar with Spring boot and building out microservices for cloud native applications. More ❯

Contract: Initial 3 months Location: Newcastle (on-site once per sprint, flexibility under discussion) Overview We're looking for a Senior Java Developer to join a high impact public sector Project. This is an exciting opportunity to contribute to critical services, working with modern technologies in a collaborative environment. Key requirements Strong Java expertise (Java 21+ …/CD pipelines (GitLab CI), Docker, and Git. Familiarity with Apache Kafka, microservices, and containerisation. Prior government project experience highly desirable. How to Apply If you're a proactive developer with strong technical skills and SC clearance eligibility, we'd love to hear from you. Please Apply Now More ❯

Full Stack Developer Java/Angular Location: Galway Model: Hybrid Term: 12+ months | Rate: Top-tier day rate Full Stack Java/Angular Developer required for a great long term contracting role with a leading organisation who have a large presence in Galway. You’ll work in modern technology department focussing on a small number of … enterprise projects. There’s scope and variety in the role with a range of modern tools, tech and processes. Desired Skills/Experience 5+ years Java development experience Solid exposure to Angular OR React, ideally at least a year of recent experience working with modern TypeScript libraries Familiar with Spring boot and building out microservices for cloud native applications. More ❯

Java Developer - Contract 3 - 6 Month experience Remote working, Outside IR35 SC: Must be Eligible for SC (Criteria: 5 years as a resident in the UK and no longer than 30 consecutive days abroad outside the UK in the last 5 years) Run-Time are looking for +10 Senior Java Developers (contract) to join a Public Sector … Client on a long term project. Requirements: The environment is fast paced and rewarding and of great interest in terms of its use of latest tools and technologies. Java 7/8 to current Applied knowledge of front end frameworks (Angular, React, other similar) Spring framework Knowledge of selected front end technologies (HTML, JavaScript, CSS) Rest, Hibernate, Docker, Terraform 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 ❯

Java Developer - Contract 3 - 6 Month experience Remote working, Outside IR35 SC: Must be Eligible for SC (Criteria: 5 years as a resident in the UK and no longer than 30 consecutive days abroad outside the UK in the last 5 years) Run-Time are looking for Senior Java Developers (contract) to join a Public Sector Client More ❯

Job Title: Java Developer with Kafka experience Rate: £400 (Inside IR35) Duration: 12 Months Location: Remote (Occasional visits either Newcastle, Manchester, Leeds, OR Blackpool) Clearance: BPSS Stages: 2 Stages About the Role We are seeking an experienced Software Developer to join our team on a 12-month remote contract. The successful candidate will work on developing and … maintaining software applications, ensuring scalability, performance, and reliability. Key Responsibilities Design, develop, and maintain software solutions using Java, Node.js, and TypeScript. Write efficient and secure Shell Scripts to support automation and system tasks. Work within a Linux environment to deploy, troubleshoot, and optimize applications. Collaborate with cross-functional teams to gather requirements and deliver high-quality code. Participate in … code reviews, testing, and debugging processes. Ensure best practices in software development, including version control, CI/CD, and documentation. Required Skills & Experience Proven professional experience in Java and Node.js development. Strong knowledge of JavaScript and TypeScript. Hands-on experience with Linux systems. Proficiency in writing and maintaining Shell Scripts. Solid understanding of software development life cycle (SDLC) and More ❯

I am working with a consultancy looking for a Java developer to join a contract. This will involve working with Java code and CI pipelines with GitLab CI to improve, tune and extend so that when we get dependency updates or security fixes from engineering tooling we then automate the testing and deployment of these services all … the way to production in a controlled and secure way. Tech stack - Java engineer needs experience with spring boot framework, TDD, Grafana and Prometheus for monitoring and alerting and understanding of the CI/CD process.All candidates must pass a BPSS.Immediate start.End March 2026.Weekly travel to Leeds/Newcastle/Manchester.£400 - £500 per dayInside IR35 More ❯