1 to 25 of 43 Java Developer Jobs in London

Lead Java Developer/Software Engineer London/WFH to £115k Are you a hands-on Java Developer with leadership skills? You could be progressing your career in a Lead Java Developer role at a global FinTech/CFD trading company that has been consistently voted as one of the UKs top employers. As … a Lead Java Developer you'll join a fairly new team working on a new crypto offering and split your time between hands-on development with people management (70/30). You'll set the technical direction, mentor engineers and ensure code quality, observability, scalability and security are embedded into high-quality, high-impact releases. You'll … be working with a modern, cloud native tech stack using Java, Spring Boot, AWS, Kafka and CI/CD to build highly scalable, distributed systems with 24/7 availability. Location/WFH: There's a hybrid model with two days a week work from home, when you are in the office you'll be based in the City More ❯

Lead Java Developer/Software Engineer London/WFH to £115k Are you a hands-on Java Developer with leadership skills? You could be progressing your career in a Lead Java Developer role at a global FinTech/CFD trading company that has been consistently voted as one of the UKs top employers. As … a Lead Java Developer you'll join a fairly new team working on a new crypto offering and split your time between hands-on development with people management (70/30). You'll set the technical direction, mentor engineers and ensure code quality, observability, scalability and security are embedded into high-quality, high-impact releases. You'll … be working with a modern, cloud native tech stack using Java, Spring Boot, AWS, Kafka and CI/CD to build highly scalable, distributed systems with 24/7 availability. Location/WFH: There's a hybrid model with two days a week work from home, when you are in the office you'll be based in the City More ❯

Lead a cutting-edge crypto development team at a globally recognised FinTech company that's consistently voted as one of the UK's top employers.* *Lead Java Developer/Software Engineer London/WFH to £115k* Are you a hands-on Java Developer with leadership skills? You could be progressing your career in a Lead Java Developer role at a global FinTech/CFD trading company that has been consistently voted as one of the UK's top employers. As a Lead Java Developer you'll join a fairly new team working on a new crypto offering and split your time between hands-on development with people management (70/30). … engineers and ensure code quality, observability, scalability and security are embedded into high-quality, high-impact releases. You'll be working with a modern, cloud native tech stack using Java, Spring Boot, AWS, Kafka and CI/CD to build highly scalable, distributed systems with 24/7 availability. *Location:* There's a hybrid model with two days a More ❯

Java Developer/Backend Software Engineer (Java 17 Kotlin AWS) London/WFH to £85k Are you a technologist Java Developer with Kotlin skills looking to progress your career, working with a modern cloud based infrastructure and a range of technology? You could be joining a hugely successful and growing commodities trading firm that specialise … in trading silver and gold. As a Java Developer you'll collaborate with the Lead Engineer on the core trading platform as the company looks to scale the platform and introduce new features. There's an emphasis on code quality; designing and developing highly complex web based trading platforms working across the full development lifecycle. The technology stack … includes Java 17, Kotlin, Spring Boot and AWS amongst others; you'll be encouraged to expand your skillset using the latest technologies and choosing the best tool for the job in a friendly Agile team environment. WFH Policy: You'll join the team in the West London office with flexibility to work from home twice a week. About you More ❯

Join a thriving commodities trading firm where cutting-edge technology meets the dynamic world of precious metals trading.* *Java Developer/Backend Software Engineer (Java 17 Kotlin AWS) London/WFH to £85k* Are you a technologist Java Developer with Kotlin skills looking to progress your career, working with a modern cloud based infrastructure and … a range of technology? You could be joining a hugely successful and growing commodities trading firm that specialise in trading silver and gold. As a Java Developer you'll collaborate with the Lead Engineer on the core trading platform as the company looks to scale the platform and introduce new features. There's an emphasis on code quality … designing and developing highly complex web based trading platforms working across the full development lifecycle. The technology stack includes Java 17, Kotlin, Spring Boot and AWS amongst others; you'll be encouraged to expand your skillset using the latest technologies and choosing the best tool for the job in a friendly Agile team environment. Work from Home Policy: You More ❯

Java Developer - Remote Working Lynx are currently working with a large IT consultancy to help them source a Senior Java Developer . Our client is large global Consultancy who work with enterprise clients, solving their business and technology problems using cutting edge Solutions. Responsibilities: Engaging in the entire software development lifecycle, from gathering requirements and designing … Advocating for and contributing to best practices in software engineering across teams and projects Key skills and experience: Must be either SC cleared or eligible Experience working as a Java Developer Java development experience Experience working within cloud environments If this role sounds of interest, then please apply with your updated CV. More ❯

Lead Java Developer/Software Engineer London/WFH to £115k Are you a hands-on Java Developer with leadership skills? You could be progressing your career in a Lead Java Developer role at a global FinTech/CFD trading company that has been consistently voted as one of the UKs top employers. As … a Lead Java Developer you'll join a fairly new team working on a new crypto offering and split your time click apply for full job details More ❯

Lead Java Developer/Backend Software Engineer London to £135k Do you have advanced Java technical knowledge combined with team leadership skills? You could be progressing your career at the Investment Management arm of a global bank. As a Lead Java Developer you will head up a small, globally distributed team responsible for writing production … quality Java code used for pricing and hedging FX instruments and overseeing the algorithms' performance intraday. You'll spearhead a project to modernise the FX Risk and post-trade platform to a modern microservices environment, collaborating with the business and providing technical guidance, code reviews and 1-2-1s to develop the engineers in your team and ensure … Location/WFH: You'll be based in the London office and have flexibility to work from home once a week. About you: You have a deep knowledge of Java including multithreading You have team leadership experience, including technical project leadership, code reviews, 1-2-1s, developing others You have experience in a Capital Markets environment, FX preferred More ❯

Senior Java Developer - Remote Working Lynx are currently working with a large IT consultancy to help them source a Senior Java Developer . Our client is large global Consultancy who work with enterprise clients, solving their business and technology problems using cutting edge Solutions. Responsibilities: Engaging in the entire software development lifecycle, from gathering requirements and … Advocating for and contributing to best practices in software engineering across teams and projects Key skills and experience: Must be either SC cleared or eligible Experience working as a Java Developer Java development experience Experience working within cloud environments If this role sounds of interest, then please apply with your updated CV. More ❯

Permanent Java Developer What we're looking for Mercator is seeking a dynamic, forward-thinking?Java Developer with excellent communication skills who can help Mercator in its continued transformation. You will be open-minded, happy to work on your own or as part of a team and want to learn new technologies and promote best practice. … Mercator Java Developers work collaboratively in multidisciplinary agile scrum teams to develop, modify and maintain user interfaces for new digital services. Using agile methods, you will work closely with other members of the scrum team throughout the development cycle in order to design, build, test, maintain and support the new digital services. As a Java Developer you … will have: Excellent Java development skills and a strong track record of designing, developing, delivering, testing and optimising Java applications for public use More ❯

Senior Java Developer | SC Clearance Required | Up to £650 per day (Inside IR35) | Remote with Monthly Visits to London | 6 Month Contract MERITUS are working with a large consulting organisation looking for a Senior Java Developer on a project working into a UK Central Government client. You'll play a key role in designing, coding, reviewing … and testing solutions within the Java stack , collaborating with developers, testers, and DevOps engineers. The position also involves working on automated tests, infrastructure updates, and maintaining high-quality standards across all stages of development. The role is remote with monthly visits into the London office on an initial 6 Month contract. Main Responsibilities: Design, code, review, and unit test … applications using the Java stack. Collaborate with cross-functional teams, including developers, testers, and DevOps engineers. Support and enhance legacy systems currently in maintenance mode. Contribute to automated testing (C#) and infrastructure improvements (Docker, Ansible, Python, Linux). Required Skills: Proven experience with Java, Spring, Maven, Git, JUnit, and Web APIs (REST/JSON, XML/SOAP). More ❯

Senior Java Developer | SC Clearance Required | Up to £650 per day (Inside IR35) | Remote with Monthly Visits to London | 6 Month Contract MERITUS are working with a large consulting organisation looking for a Senior Java Developer on a project working into a UK Central Government client. You'll play a key role in designing, coding, reviewing … and testing solutions within the Java stack , collaborating with developers, testers, and DevOps engineers. The position also involves working on automated tests, infrastructure updates, and maintaining high-quality standards across all stages of development. The role is remote with monthly visits into the London office on an initial 6 Month contract. Main Responsibilities: Design, code, review, and unit test … applications using the Java stack. Collaborate with cross-functional teams, including developers, testers, and DevOps engineers. Support and enhance legacy systems currently in maintenance mode. Contribute to automated testing (C#) and infrastructure improvements (Docker, Ansible, Python, Linux). Required Skills: Proven experience with Java, Spring, Maven, Git, JUnit, and Web APIs (REST/JSON, XML/SOAP). More ❯

Fidessa Developer (Java Spring Boot API) London to £135k Do you have strong Java coding skills combined with experience of developing on the Fidessa order management system? You could be progressing your career at the Investment Management arm of a global bank, gaining an indepth knowledge of Capital Markets. As a Fidessa Developer you will design … Location/WFH: You'll be based in the London office and have flexibility to work from home once a week. About you: You have a deep knowledge of Java including Spring Boot and APIs You have strong experience of developing on Fidessa You have an understanding of Capital Markets You have excellent communication and collaboration skills You are … degree educated in Computer Science or similar technical or numerate discipline What's in it for you: As a Fidessa Developer (Java Spring Boot API) you will receive a competitive Salary to £135k Bonus Pension One day work from home per week Continuous training and career progression opportunities Apply now to find out more about this Fidessa Developer More ❯

Sr Lead Java Developer - FX Options - Inside IR35 Central London - Hybrid - 3 days on site, 2 days remote 12 months Brief My client is looking for an experienced Lead Java Developer with hands-on experience integrating Quant libraries to join their FX Options technology team. In this contract, you'll take a hands-on leadership role … and delivering solutions for the front office. Key Responsibilities Lead the design and re-engineering of a core FX Options trading platform. Integrate Quant libraries (typically C++) into a Java-based system - focusing on integration, not C++ development. Deliver high-quality Java UI (Swing) components for front-office users. Work closely with Quants, Traders, and Risk teams to … Provide technical leadership , oversee solution design, and drive best coding practices. Be hands-on in development, debugging, and platform optimisation. Required Skills 5-10 year's experience as a Java Developer within front-office or trading environments. Strong Java Core and Swing Proven experience integrating Quant or pricing libraries . Solid business knowledge of FX Options and More ❯

Sr Lead Java Developer - FX Options - Inside IR35 Central London - Hybrid - 3 days on site, 2 days remote 12 months Brief My client is looking for an experienced Lead Java Developer with hands-on experience integrating Quant libraries to join their FX Options technology team. In this contract, you'll take a hands-on leadership role … and delivering solutions for the front office. Key Responsibilities Lead the design and re-engineering of a core FX Options trading platform. Integrate Quant libraries (typically C++) into a Java-based system - focusing on integration, not C++ development. Deliver high-quality Java UI (Swing) components for front-office users. Work closely with Quants, Traders, and Risk teams to … Provide technical leadership , oversee solution design, and drive best coding practices. Be hands-on in development, debugging, and platform optimisation. Required Skills 5-10 year's experience as a Java Developer within front-office or trading environments. Strong Java Core and Swing Proven experience integrating Quant or pricing libraries . Solid business knowledge of FX Options and More ❯

Java Developer - Active SC Up to £640 per day (Inside IR35) London/Remote 6 months My client is an instantly recognisable consultancy who urgently requires a Lead Full Stack Developer to join a business-critical programme. Key Requirements: Proven experience working as a Lead Java Developer within the public sector Active Security Clearance (SC … Java (8/11/17+): Expert-level programming and deep understanding of the language and its core libraries Spring Boot: Expert in building RESTful APIs and microservices AWS: Strong experience with core AWS services (EC2, S3, Lambda, IAM, etc.) Kafka/Messaging Systems: Expertise in building event-driven architectures SQL: Strong experience with relational databases and query optimization More ❯

Java Developer - Active SC Up to £640 per day (Inside IR35) London/Remote 6 months My client is an instantly recognisable consultancy who urgently requires a Lead Full Stack Developer to join a business-critical programme. Key Requirements: Proven experience working as a Lead Java Developer within the public sector Active Security Clearance (SC … Java (8/11/17+): Expert-level programming and deep understanding of the language and its core libraries Spring Boot: Expert in building RESTful APIs and microservices AWS: Strong experience with core AWS services (EC2, S3, Lambda, IAM, etc.) Kafka/Messaging Systems: Expertise in building event-driven architectures SQL: Strong experience with relational databases and query optimization More ❯

Java Developer - Active SC Up to £640 per day (Inside IR35) London/Remote 6 months My client is an instantly recognisable consultancy who urgently requires a Lead Full Stack Developer to join a business-critical programme. Key Requirements: Proven experience working as a Lead Java Developer within the public sector Active Security Clearance (SC … Java (8/11/17+): Expert-level programming and deep underst click apply for full job details More ❯

Contract Java Developer (Inside IR35) | SC Cleared We are seeking a highly skilled Contract Java Developer with active SC Clearance to join a critical project on a long-term contract. This is a crucial role for a candidate who can hit the ground running and contribute to a significant public sector programme. Key Information IR35 Status … to problem-solving. You will be working with a modern tech stack to deliver a new solution for a high-profile client. Required Skills & Experience Extensive commercial experience with Java 8+ . Proven expertise with RDBMS , specifically designing schemas and optimising complex SQL queries. Strong background in building and consuming RESTful APIs and microservices. Hands-on experience with Apache … Kafka for streaming data and event-driven systems. Experience with Spring Boot and cloud platforms (e.g., AWS, Azure) is highly desirable. If you are a talented Java contractor with the required clearance and are comfortable working inside IR35 via an umbrella company, please get in touch with your latest CV. More ❯

SC + NPPV3 Cleared Java Developer - 6 months+ - £Inside IR35 - Remote with occasional travel to London Please note: Candidates must have a current and active SC and NPPV3 Clearance- unfortunately, applications without this cannot be considered. Looking for a number of SC + NPPV3 Cleared Java Developers to work on a Law Enforcement programme. Key Responsibilities: Work … on data mapping and report writing in Java. Essential Skills: Java AWS Spring Boot Kafka Desirable Skills: React JavaScript SC + NPPV3 Cleared Java Developer - 6 months+ - £Inside IR35 - Remote with occasional travel to Londo More ❯

SC + NPPV3 Cleared Java Developer - 6 months+ - £Inside IR35 - Remote with occasional travel to London Please note: Candidates must have a current and active SC and NPPV3 Clearance- unfortunately, applications without this cannot be considered. Looking for a number of SC + NPPV3 Cleared Java Developers to work on a Law Enforcement programme. Key Responsibilities: Work … on data mapping and report writing in Java. Essential Skills: Java AWS Spring Boot Kafka Desirable Skills: React JavaScript SC + NPPV3 Cleared Java Developer - 6 months+ - £Inside IR35 - Remote with occasional travel to Londo More ❯

SC + NPPV3 Cleared Java Developer - 6 months+ - £Inside IR35 - Remote with occasional travel to London Please note: Candidates must have a current and active SC and NPPV3 Clearance- unfortunately, applications without this cannot be considered. Looking for a number of SC + NPPV3 Cleared Java Developers to work on a Law Enforcement programme. Key Responsibilities: Work … on data mapping and report writing in Java. Essential Skills: Java AWS Spring Boot Kafka Desirable Skills: React JavaScript SC + NPPV3 Cleared Java Developer - 6 months+ - £Inside IR35 - Remote with occasional travel to London Damia Group Limited acts as an employment agency for permanent recruitment and employment business for the supply of temporary workers. By applying More ❯

Job Title: Calypso Java Developer Start Date: As soon as possible Location: Threadneedle Street, London (4 days per week onsite) Salary/Rate: Up to £600/day INSIDE IR35 Job Type: 12 month contract - very likely to extend Company: Global software consulting - joining the financial arm of the business Responsibilities: We are looking for a Senior Software … take part in capacity planning and design activities, and work with colleagues within FI & Derivatives team and beyond to help deliver best-in-Class systems. Qualifications: Undergraduate Degree Strong Java Developer needs to have experience designing/building distributed applications, JVM tuning, multi-threading Strong Calypso Experience Capital Market Knowledge Trade Management SQL Knowledge/Oracle DB Linux More ❯

LocationBloomsbury Square, London, United Kingdom# Senior Java Developer at N Consulting LtdLocationBloomsbury Square, London, United KingdomSalary£400 - £450/dayJob TypeContractDate PostedSeptember 12th, 2025Apply NowWork mode: Hybrid, Office location will be Bishopsgate, London Contract duration: 6 months Location: London - JOB DETAILS Role Title: Senior Developer We are seeking a highly skilled and experienced Senior Developer with … deep expertise in AWS BluAge modernization tools, Java Spring Boot, and Apache Kafka. The ideal candidate will play a key role in modernizing legacy applications, building scalable microservices, and implementing real time data pipelines. Must have technical skills: AWS BluAge Kafka Java Springboot Nice to have skills: Good to have some knowledge on banking domain Responsibilities: Solution design More ❯

1. Job purpose We are looking for a sharp Senior Java Developer to play a key role in a small collaborative team building trading venues and associated infrastructure. We follow rapid development and deployment cycles for projects and share ownership of the entire codebase, so you will get great experience across a variety of exchange applications and financial … product types. We care about the code that we write and we want a developer that is more interested in writing clean, maintainable, efficient code rather than a quick hack. Any former experience with specific cryptocurrencies, and/or related skills such as decentralized finance (DeFi), tokenisation, trading, matching engine, clearing and settlement as well as capital markets system … integration will be a very useful complement to the above. 2. Key technology used Primary: Java 8+ Secondary: Spring FIX Hibernate (Postgres) Sockets Linux Maven AWS/Cloud deployment SVN/GIT EPL (Esper) JMS (ActiveMQ) 3. Methodology Agile/Scrum Continuous integration Test automation TDD 4. Requirements Must have Core Java SE Desire to learn Passion for More ❯