1 to 25 of 40 Java Developer Jobs in London

Java Developer - SC Cleared - Spring Boot/AWS - Croydon (Hybrid) Location: Croydon (Hybrid Working) Clearance: Active SC Clearance required Type: Contract Rate: £475 per day Duration: 12 months Overview We are looking for an SC Cleared Java Developer to support the delivery of modern, cloud-based … delivery, and contributing to greenfield microservices-based solutions. Hybrid working is required, with on-site presence in Croydon . Key Skills (Essential) Strong Java development experience Spring Boot SQL and report writing Experience working in AWS environments EBSA experience API development and microservices architecture Experience with CI/ ...

This is a fantastic opportunity to work as a contract Java Developer on a remote basis, inside IR35 for the public sector. Current SC Clearance that has been used in the last 12 months and recent Identity Access Management experience are essential. The key experience required for this … Java Developer position are: SC Cleared Identity Access Management Java Azure If you do have the relevant experience for remote contract Java Developer position, please do apply. ...

Java Developer Low Latency Crypto Location: 3 - 4 days in London, 1-2 day from home Salary: Circa 100K 130K + Bonus + Benefits Java Developer with experience in low latency systems required by a well-established Crypto Technology Company! This is a varied, challenging role … working on live systems, improving performance, and solving the kinds of latency and connectivity challenges that directly impact trading outcomes Experience: Experience in Java or C++ within low latency environments Experience working on exchange connectivity within Crypto Comfortable working in a Linux/Unix environment Tremendous opportunity offering plenty ...

Java Developer – Low Latency Crypto Location: 3 - 4 days in London, 1-2 day from home Salary: Circa 100K – 130K + Bonus + Benefits Java Developer with experience in low latency systems required by a well-established Crypto Technology Company! This is a varied, challenging role … working on live systems, improving performance, and solving the kinds of latency and connectivity challenges that directly impact trading outcomes Experience: Experience in Java or C++ within low latency environments Experience working on exchange connectivity within Crypto Comfortable working in a Linux/Unix environment Tremendous opportunity offering plenty ...

Java Developer Contract: 12 months Rate: £600 per day (Inside IR35) Location: UK (Remote some days in London, Manchester or Leeds (adhoc) This role sits within a large-scale NHS digital transformation programme delivered via a leading consultancy partner. The programme focuses on modernising critical healthcare systems, improving … secure, and interoperable digital services that support high-volume user interactions and integrate with multiple systems across the healthcare ecosystem. The Role As a Java Developer, you will be responsible for designing, building, and maintaining high-quality backend services within a complex, distributed system. You will work closely ...

Java Developer – SC Cleared Whitehall Resources are looking for a Java Developer – SC Cleared. This role will be remote based working with occasional visits onsite to South London, for an initial 6-month contract. ***Due to the nature of the client, this role requires active … Clearance*** ***Inside IR35*** Skills and Experience: o Backend: Java, Spring Boot, SQL/Report Writing o Cloud: AWS, EBSA o Frontend: React, Next.js (non-essential) o API development, microservices, CI/CD pipelines, containerization (Docker/Kubernetes), Greenfield development experience ...

Java Developer Low Latency Crypto Location: 3 - 4 days in London, 1-2 day from home Salary: Circa 100K 130K + Bonus + Benefits Java Developer with experience in low latency systems requiredby a well-established Crypto Technology Company! This is a varied, challenging role focused … working on live systems, improving performance, and solving the kinds of latency and connectivity challenges that directly impact trading outcomes Experience: Experience in Java or C++ within low latency environments Experience working on exchange connectivity within Crypto Comfortable working in a Linux/Unix environment Tremendous opportunity offering plenty ...

Java Developer Low Latency Crypto Location: 3 - 4 days in London, 1-2 day from home Salary: Circa 100K 130K + Bonus + Benefits Java Developer with experience in low latency systems requiredby a well-established Crypto Technology Company! This is a varied, challenging role focused ...

IDAM Back-end Java Developer - SC Cleared Rate: £500 - £535 a day IR35 : Inside IR35 Location: Remote within the UK Duration: Initially 6 months Clearance: Active SC Clearance required You will join a global IT consultancy who are delivering digital transformation to public sector body. They are looking … back-end Java Developer with proven IDAM (Identity and Access Management) experience. You will be part of a continuous improvement squad delivering enhancements and new features alongside BAU work (i.e. incidents and support maintenance activities). In addition, you will be involved in helping our client transform their ...

This is a fantastic opportunity to work as a contract Java Developer on a remote basis, inside IR35 for the public sector. Current SC Clearance that has been used in the last 12 months and recent Identity Access Management experience are essential. The key experience required for this … Java Developer position are: SC Cleared Identity Access Management Java Azure If you do have the relevant experience fo click apply for full job details ...

Java Messaging Engineer | eBond Trading Platform We are seeking a high-caliber Java Backend Developer to join the Booking & Messaging cell of a global electronic trading platform. This role is at the heart of the "eBond" ecosystem, managing high-throughput trade flows and external venue connectivity. Your … Technical Arsenal Core Java Mastery: Expert-level Java (8+) with a focus on Multithreading, Concurrency, and Asynchronous processing. Reactive Systems: Hands-on experience with Functional Reactive Programming (RxJava, Java 9 Flow API, or similar). Low Latency Messaging: Deep understanding of 60East AMPS , Kafka, or Solace. ...

Senior Java Developer - Multithreading/caching - sought by leading investment bank based in London - Contract *inside IR35 - umbrella* Key Responsibilities Develop and maintain high-performance backend services for complex data processing workloads. Design scalable architectures for large-volume calculations and data pipelines. Work closely with cross-functional teams … joins, and large/complex datasets. Leverage AI tooling to enhance productivity in coding and system design. Required Skills & Experience 8+ years ' experience in Java backend development (Java 17+). Degree in Computer Science, Software Engineering, or related field. Strong expertise in Java + Spring Boot/ ...

resilient platforms. Join a team committed to modern development practices in a collaborative and forward-thinking culture. This role involves designing, building, and maintaining Java microservices and APIs within a cloud-native setting, focusing on compliance, security, and operational excellence. It's an excellent opportunity for experienced developers … thrive in dynamic, regulated environments seeking to make an impactful contribution to critical banking products. Role Overview: The Senior Java Developer will play a key role within the engineering team, responsible for delivering high-quality Java-based microservices in a cloud-first environment. The role supports ...

Credit eTrading Developer (Java) Duration : 12 Months (with renewals) Pay Rate : £750 (inside) Location : London - 4 days a week in the office I'm currently supporting a leading financial services consultancy that partners closely with front-office trading teams to deliver high-performance electronic trading solutions. This role … electronic trading Participating in peer code/design reviews Supporting QA teams and resolving production issues with a strong feedback loop Upgrading systems to Java 17, modern frameworks, and the Solace messaging platform Key Responsibilities Develop, optimise, and maintain server-side Java services for low-latency trading Implement ...

Contract 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 … 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 ...

months (extension likely) Working Model: Hybrid Level: Senior/VP-equivalent individual contributor Overview A leading global financial services organisation is seeking a Senior Java Developer (Contract) to join its Electronic Fixed Income (eFI) Technology team. This role sits in a front-office electronic trading environment , focused … building and optimising low-latency, high-performance Java trading systems used by institutional clients. A core part of the engagement will be supporting the rollout and optimisation of TransFICC connectivity , alongside ongoing performance improvements across pricing, RFQ, execution, and market-data workflows. Required Experience Extensive background in electronic trading ...

their goals. The 3 G’s of RE: “Get Shit Done.” “Get Over Shit.” “Give a Shit.” We are seeking an experienced and opinionated Java Developer to join our high-performing engineering team, working on l ow latency , high-throughput systems in the payments processing domain. This hybrid … offers the opportunity to build scalable, real-time services using modern technologies. If you’re passionate about performance, have strong Core Java and SpringBoot expertise, and thrive in a collaborative yet opinionated engineering culture, we want to hear from you. Key Responsibilities : Design, develop, and optimize low-latency, high ...

Credit eTrading Developer (Java) Duration : 12 Months (with renewals) Pay Rate : £750 (inside) Location : London - 4 days a week in the office I'm currently supporting a leading financial services consultancy that partners closely with front-office trading teams to deliver high-performance electronic trading solutions click apply ...

About The Role FDM is a global business and technology consultancy seeking a senior EFX java developer to work for our client within the Financial Services sector. This is initially a 12 month contract with the potential to extend and will be a hybrid role that will … strategic EFX pricing and auto-hedging capabilities for FICC E-Trading for 2026. In a typical day you can expect to develop Java code, review code written by your colleagues, attend Agile ceremonies, refine requirements with users (Quantitative Strategies Group and Traders) and liaise with sibling teams ...

currently working with a London-based Financial Services client who are actively seeking a Senior Java Developer to work on the development of a business-critical application with a range of cutting-edge technologies. What you'll need to succeed : 10+ years' Java Development experience ...

months (extension likely) Working Model: Hybrid Level: Senior/VP-equivalent individual contributor Overview A leading global financial services organisation is seeking a Senior Java Developer (Contract) to join its Electronic Fixed Income (eFI) Technology team click apply for full job details ...

Role: Java L3 Support Engineer Location: Croydon or Reading, UK (Hybrid 2 Days Onsite is required) Type: Permanent SC Eligible Must have skills: Extensive server-side, hands-on Java 8+ development experience with strong Spring, Spring Boot & Hibernate Strong understanding of Microservice architecture Experience building web services ...

Principal Developer – FX Trading Systems (Java/C++) Location: London or Nottingham (Hybrid) Rate: £490 per day (Outside IR35) Contract: Initial contract until end of year, with strong likelihood of extension as part of a multi-year programme. The Opportunity An established financial services organisation is seeking … experienced Principal Developer to play a key role in the architecture and development of a high-performance FX Matching Venue. This is a senior technical leadership role within a large, multi-year programme focused on building next-generation trading infrastructure. The successful candidate will combine deep Java expertise ...

Title: Senior Java full stack developer/Tech Lead Work model – Hybrid (3 days in an office) Location – London, UK We are seeking an experienced and results-driven Senior Java Full Stack Developer (React Mandatory) to join our team in London. This project is associated with … maintain robust, scalable, and high-performance web applications. Build responsive and dynamic user interfaces using React js. Develop backend services and APIs using Java (Spring Boot/Spring Framework). Write clean, maintainable, and efficient code following best practices. Perform code reviews and mentor junior developers. Optimize applications ...

Role: Java L3 Support Engineer Location: Croydon or Reading, UK (Hybrid 2 Days Onsite is required) Type: Permanent SC Eligible Must have skills: Extensive server-side, hands-on Java 8+ development experience with strong Spring, Spring Boot & Hibernate Strong understanding of Microservice architecture Experience building web services ...