Skip to content.
Pontoon is an employment consultancy. We put expertise, energy, and enthusiasm into improving everyone's chance of being part of the workplace. We respect and appreciate people of all ethnicities, generations, religious beliefs, sexual orientations, gender identities, and more. We do this by showcasing their talents, skills, and unique experience in an inclusive environment that helps them thrive. Role: Senior Java Developer Duration: 12 Months Location: Welwyn Garden City (2 to 3 days in office) Rate: £700 inside umbrella As a Senior Java Developer, you will be a vital contributor to our... 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... more ->
I am currently working with a London-based investment bank who are actively seeking a Senior fullstack Java Developer to work on the development of a business-critical application within the FX space. What you'll need to succeed: Extensive fullstack Java and React experience within financial services - Mandatory click apply for full job details more ->
Full stack Engineer This application is a suite of microservices used to manage outreach to customers for information, authorisations etc. The team is distributed across China, India, Poland and the UK. The role involves modernising aspects of the application and expanding it to support additional customer types, customer journeys and new functionality. In this role, you will: Be hands-on, delivering code to production, supporting the architecture and design of the system aligned to a microservice structure. Be expected to have an awareness of business, engineering and non-functional... more ->
Java Engineer | Glasgow based | Must have Azure experience! | £550-£700 (Inside IR35) | 6 months initially (likely extension) We're looking for a Java Engineer, that has previous experience working with Azure, specifically Azure app services for a range of exciting projects. If you don't hold strong experience in this cloud, it will not be right for you. Rate: £550-£700 (Inside IR35) Length: 6-month initial contract, strong likelihood of extension Location: Scotland (fully on site) Key Skills & Experience: Strong core Java development background Experience with Spring Boot Exposure to Azure... more ->
Design, develop, and maintain Back End applications using Java and Kotlin Build and consume RESTful APIs and Microservices Collaborate with product owners, architects, and cross-functional teams Write clean, maintainable, and well-tested code Perform code reviews and ensure adherence to best practices Troubleshoot production issues and optimize application peformance Required Skills: Strong experience in Core Java (Java 8+) Hands-on experience with Kotlin for Back End development Solid experience with Spring/Spring Boot Good understanding of Microservices architecture Experience with... more ->
Essential Skills: Strong experience with Java (Java 8+), Spring Boot, and microservice architectures. Experience building RESTful APIs and integrating with third-party services. Familiarity with cloud platforms (AWS or Azure). Experience with CI/CD pipelines and DevOps tooling (GitHub Actions, Jenkins, GitLab CI, Azure DevOps). Strong understanding of relational and NoSQL databases. Experience with automated testing frameworks (JUnit, Mockito, RestAssured). Understanding of Agile delivery and multidisciplinary team working. Knowledge of secure coding practices and government security... more ->
Software Engineer -Java (Hands On) Hybrid Working - London or Bristol - 2 days a week on site. Financial Services Lorien's leading banking client is looking for several Java Software Engineers to become part of an expanding team working on 2 major projects that are going through an infrastructure upgrade. The ideal candidate will have strong hands-on skills coding with Java, with experience of working on large scale infrastructure. This role is based in London or Bristol. This role will be Via Umbrella. Working in a Hybrid Model of 2 days a week on site. Key Skills and Experiences Experience... more ->
Seeking multiple Java Developers based in the South of England (East Sussex, West Sussex, Surrey, etc) for a leading business. Hybrid and remote working opportunities available with roles paying between £400pd - £550pd Dependent on experience. Please note - No sponsorship is on offer and being eligible for Security Clearance (SC) is essential, therefore you must have lived in the UK for the last 5 click apply for full job details more ->
Seeking multiple Java Developers for a leading business based in South England. Hybrid and remote working opportunities available with Permanent and Contract roles on offer. No sponsorship is available and being eligible for Security Clearance is essential, therefore you must have lived in the UK for the last 5 years as a minimum and have relevant right to work in the UK click apply for full job details more ->
The Race to Zero: Senior Java Low-Latency Engineer (Fixed Income) 6 months Contract London Hybrid Role Competitive daily rate. Our client "A premier global electronic trading Powerhouse" is looking for a Java Specialist to lead a mission-critical shift in their E-Fixed Income (eFI) architecture. They aren't just looking for a "developer"-we need a systems artist who understands that in this world, latency is the only metric that matters.The Tech Stack The Core: Low-latency Java (Mechanical Sympathy, Memory Tuning, GC Avoidance). The Connectivity: TransFICC specialization, TCP/UDP,... more ->
I am working with a consultancy feeding into the public sector looking for 2x SC preferable Java developers. Inside IR35 £400 per day Start date - immediate End date - 29th April 2026 Active SC preferred TDD and BDD. Java 21 (or later). Microservice architectures. Agile environment activities Pair programming environment activities. Implementing APIs for internal and external use. Build a useful, robust automated test suite to support a continuous deployment environment. Communicate technical concepts to a non-technical audience. Using Unix-like operating systems such as Linux and/or Mac OS... more ->
Manchester/1 day per week We are seeking an experienced Senior Java Backend Engineer to join a major government digital programme. You will design, build, and maintain secure, scalable Back End services using Java, microservices, and API-driven integration patterns, deployed on Microsoft Azure. This role is ideal for someone who thrives in complex environments, enjoys solving technical challenges, and can contribute to high-quality, user-centred public services. Essential Skills: Strong commercial experience with Java, Spring Boot, and Back End microservices. Hands-on experience with Azure... more ->
Senior Software Engineer (Java/Spring Boot) £55,000 - £75,000 | UK-wide | Hybrid (1 day per month onsite) Security Clearance (SC) eligibility required We're hiring an experienced Senior Software Engineers to join a growing engineering team delivering high-impact digital services for a large UK public sector organisation. This is a hands-on engineering role, focused on building, deploying and supporting modern Java-based services in a mature Agile and DevSecOps environment. You'll work end-to-end on real-world systems used at national scale, alongside engineers, testers, DevOps and product... more ->
Senior Java Engineer Location: London (1-2 days a week in the office, mandatory on Thursdays) Experience: Minimum 8-10 years Key Responsibilities Software development and maintenance of Cortex Secondary Trader applications Participate in an agile based software development life cycle including analysis, documentation, development, testing, code reviews. Collaborate with the production support team for releases and troubleshooting of the components. Provide third-line support for the Cortex Secondary platform Skills and Experience At least four years software development experience or... more ->
Job Title: Java Developer (Kotlin) Contract: 6 months (Inside IR35) - Extendable Location: Hybrid - West Sussex (2-3 days per week on-site) Rate: DOE Client: Leading Financial Services Organisation Overview We are working with a leading financial services client who is looking to engage an experienced Java Developer with strong Kotlin experience to join a high-performing engineering team. This is a critical contract role contributing to the design and delivery of scalable, high-quality Back End systems within a complex enterprise environment. The successful contractor will be working on... more ->
Job Title: Java Developer (Golang) Contract: 6 months (Inside IR35) - Extendable Location: Hybrid (2-3 days per week on-site) Rate: DOE Client: Leading Financial Services Organisation Overview A leading financial services client is seeking an experienced Java Developer with strong Golang exposure to join a critical engineering programme. This role will focus on building and enhancing high-performance Back End services within a modern, cloud-based architecture. You'll be working alongside senior engineers on scalable, resilient systems that support business-critical platforms, with a strong... more ->
Job Summary: Designs, runs and improves software that meets user needs. Competent Java developer with significant experience in AWS cloud services. Proficient in AngularJS, Jenkins, Karate, Gherkin and Cypress, Cloudformation, Jenkins, Groovy and deploying to native AWS services like ECS, S3, Lambda, SQS, Step Functions. Certification: Expected to have AWS Certified DevOps Engineer Professional accreditation or above Responsibilities: Write clean, secure code using test-driven approach. Create reusable and open code. Collaborate with other developers. Fix service faults and maintain... more ->
Java Software Engineer (Developer/Senior/Principal) Complex Systems | Modern Stack | Agile & XP Culture Remote First (office visit approx. once per month - South Manchester) £50,000 - £85,000 + Bonus + Excellent Benefits (level dependent) We're partnering with a long-established technology business building modern platforms at the heart of a complex, highly regulated domain. With continued growth across their product suite, they're now hiring Java Software Engineers across multiple levels - Developer, Senior, and Principal - to join their Scrum teams and help deliver software that genuinely... more ->
Java Full Stack Developer/Engineer Birmingham Based £40,000 to £50,000 depending on experience A well established technology firm is looking for a full stack developer/engineer to join their team to take ownership and direction of massive software development projects directly impacting millions of customers, If you have a strong passion for software development and a keen interest to develop your Java skills further then this is the perfect opportunity for you. You will play a pivotal role within the organisation as you will be taking control of the systems from the first line of code to... more ->