1 to 25 of 30 Java Developer Jobs in London

Java Developer/Software Engineer (AWS React Full Stack) London/WFH to £80k Are you a technologist Java Developer looking for an opportunity to be part of something big from the start? You could be progressing your career in an impactful role at a newly … established Fintech start-up, set up by a small team of finance and technology entrepreneurs with a hugely successful track record. As a Java Developer you will join a small team to build systems from the ground up, working across the full technology stack with a focus ...

Lead Full Stack Java Developer - SC Cleared NEW PERMANENT OPPORTUNITY FOR A LEAD FULL-STACK JAVA DEVELOPER IN LONDON WITH SC CLEARANCE Location: London (Hybrid) Salary: £80,000 - £95,000 per annum Clearance: Active SC Clearance required To apply: email The Company Join a specialist technology … modernise secure systems that underpin national operations - tackling some of the most demanding challenges in government technology. The Role As a Lead Full Stack Java Developer , you will guide a small team of engineers while remaining hands-on in the design and development of high-performance, secure applications. ...

Principle Java Developer - Java, Equity/Equities, Delta one, SVP, Business facing A leading Tier 1 investment bank are looking for a high level Java developer who knows the Equity Business and Equity trading (ideally delta 1). You will be joining a small team ...

Senior Java Developer/Backend Software Engineer (Java Spring Boot) London/WFH to £85k Are you a Software Engineer looking for an opportunity where you can make an impact? You could be progressing your career in a senior, hands-on role at a growing US based … company that provide a platform for gaming and gambling businesses to retain their customer base, as they expand their UK presence. As a Senior Java Developer you will be instrumental in helping the company to bring all tech inhouse; you'll design and develop new features and enhancements ...

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 … 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 ...

Lead Java Developer Location: Remote working with occasional travel Contract: Inside IR35, initially until the end of March Clearance: Due to the nature of the project and turnaround time - SC Clearance will need to be live and active. Role Summary We are seeking a Lead Java Developer with proven experience delivering solutions for Central Government projects. You will work in Agile Scrum teams alongside Java Engineers, Front-end Developers, and Quality Engineers to modernise legacy services into scalable, cloud-aligned platforms. This is a hands-on technical leadership role, responsible for design, code quality ...

Lead Java Developer Location: Remote working with occasional travel Contract: Inside IR35, initially until the end of March Clearance: Due to the nature of the project and turnaround time - SC Clearance will need to be live and active. Role Summary We are seeking a Lead Java Developer with proven experience delivering solutions for Central Government projects. You will work in Agile Scrum teams alongside Java Engineers, Front-end Developers, and Quality Engineers to modernise legacy services into scalable, cloud-aligned platforms. This is a hands-on technical leadership role, responsible for design, code quality ...

Java Developer - £100,000 - £140,000 – London/Hybrid Java 21 | Microservices | Spring boot | AWS | Startup | Scaleup | Fintech | Banking | Amazon Web Services | PostgreSQL | Are you a Java Developer who wants to have a voice within the team? Maybe you want to join a fast growing … partnered with a VC Backed Fintech start-up who are looking to grow their London office. They are growing quickly so are looking for Java Developers of all levels from Mid – Tech Lead to join the team. They are currently about 100 people strong and looking to double this ...

Contract Opportunity: SC-Cleared Java Developer (Spring Boot) - Immediate Start Location: London, twice a month onsite Clearance: Active SC Clearance required Contract Length: 6 months initially Start Date: Immediate Day Rate: £550 per day, Inside IR35 iO are urgently seeking an experienced SC-Cleared Java Developer … Boot expertise to join our client on an initial 6 month contract basis. Essential Skills & Experience Active SC Clearance (mandatory) Strong commercial experience with Java 8+ Expertise in Spring Boot and related Spring frameworks Experience with microservices, APIs, and cloud-native development Familiarity with CI/CD tooling (e.g. ...

Latency Java Developer - Contract Location: London - Hybrid 3 days per week in the office Duration: 12 months Rate: £480-£550 per day Inside IR35 Hiring for a Senior Java Developer with strong FX and low-latency experience to join an eFX Algo IT team. You will … quickly for Front Office - Work across design, development, testing and release - Provide 3rd-line support and ensure production stability Skills and Experience: - Strong Core Java - FX background (essential) - Proven low-latency engineering skills - Hands-on with Agrona, ring buffers, UDP, LMAX Disruptor/Chronicle Queue - FIX protocol knowledge - UNIX ...

Back End Java Developer with experience within the iGaming and Gambling sector looking for a new and exciting challenge? BENEFITS : up to £95k depending on experience, fully remote, excellent benefits package You will be joining a rapidly expanding company within the iGaming sector, who are committed to providing … brands within our market, blending sports betting and online casino entertainment on a cutting-edge, custom-built platform. You will be a skilled Senior Java Backend Developer who is a self-motivated professional with a strong track record and a passion for excellence. You'll play ...

Java Full Stack Developer Permanent Croydon/Reading (Hybrid) £65,000 - £75,000 (DOE) + Benefits + Bonus Java Full stack Developer needed with AWS and ideally with (url removed) sector experience. Start ideally Dec 2025/Jan 2026. Working on a 'hybrid remote' basis from … work with a leading global IT transformation business on a large-scale IT modernisation programmes for Government clients. Key experience + tasks will include: Java Full Stack Developer with experience developing large-scale micro-services, messaging, web services + distributed systems. In-depth Java 8/ ...

Lead Java Developer - £140k, Equity, Sign-on Bonus Java25, Springboot, Microservices, AWS, TDD, React I am working with a high-growth FinTech that’s about to enter a huge new chapter.They are a fast-scaling FinTech that’s in the middle of a major rebrand, new name … decision, nothing is top-down. It’s collaborative, thoughtful, and engineers shape the how, why, and when behind the product.They’ve just upgraded to Java 25, which the team is genuinely excited about. With eight product teams spanning credit, payments, business tools, growth, and customer experience, engineers are placed ...

Senior Java Developer/Backend Software Engineer (Java Spring Boot) London/WFH to £85k Are you a Software Engineer looking for an opportunity where you can make an impact? You could be progressing your career in a senior, hands-on role at a growing US based ...

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 ...

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 … 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 ...

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 … 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 ...

Senior Java Developer - AI/LLM - sought by trading company based in London - Contract (Remote option available for outstanding candidates) What We're Looking For Backend Engineering Expertise 8+ years of software engineering experience with strong Java backend skills. Proven track record in modernising production systems ...

Senior Java Developer - AI first - sought by trading company based in London - Contract (OUTSIDE IR35 - Remote option available for outstanding candidates) What We're Looking For Backend Engineering Expertise 8+ years of software engineering experience with strong Java backend skills. Proven track record in modernising production systems ...

Role type - Contract role IR35 status - Inside Dat rate - £750 - £900 pd About the Role: A premier Tier 1 investment bank seeks an adept Java developer specialized in algorithmic trading to join their Electronic Trading Technology team. This position involves driving forward new projects and maintaining essential trading … phases of the development cycle, including requirement gathering, coding, unit testing, patch reviewing, and providing second-level support Qualifications: Skills: Strong command of core Java APIs (Concurrency, collections) Experience with multithreaded systems, Java garbage collection, and low-latency I/O Knowledge of design patterns Experience with ...

Role: Front Office Java Developer Salary: Up to £130k base salary + Bonus + Package Location: London (Hybrid) Skills Required: Extensive Java experience needed (ideally with versions up to 21) This firm is an elite investment institution that uphold extremely high tech standards. They are made … limits. They’ll find the best team to suit your skillset/interests but you'll be working with the latest versions of Java, directly with traders and quants to build out high performance pricing and analytics tools from scratch. This role is greenfield and will allow ...

looking for a senior Java developer with genuine legacy Java EE experience to help reverse-engineer and maintain a production JBoss 4.0.5/EJB 2.1/XDoclet system. This is not a Spring Boot role. It’s for someone comfortable working in pre-annotation Java EE environments. ✅ Must-have experience Java EE 1.4/5.0 era systems JBoss 4.x (or WebLogic 8/9, WebSphere 5/6) EJB 2.1 (CMP/BMP, Session Beans, EJB-QL) XDoclet 1.2.x (understanding + debugging code generation) Ant builds , legacy deployment descriptors MySQL 5.x, JDBC, JNDI ...

Graduate/Junior Developer, Python, Linux, C#, Java - London (Teck stack: Graduate/Junior Developer, Python, Linux, C#, Java, .NET 10.0, C#, J2EE, Agile, TDD, BDD, Graduate/Junior Developer) Since 2006 our client's revolutionary marketing software platform has been helping businesses all over … customers by delivering inbound experiences that are relevant, helpful, and personalized. Having recently launched in the UK, they looking to hire Graduate/Junior Developer (Python, Linux, C#, Java)) to become a part of their ever-growing family. They believe that individual developers are in the best position ...

Software Engineer Our new client are expanding their engineering capability and are looking for talented Software Engineers with a strong focus on Java to join a growing team. If you thrive in modern engineering environments and enjoy building scalable, high-quality services, this role will put your skills … work on meaningful, production-grade systems. What You'll Work On You'll be developing robust, secure, and efficient services using modern Java frameworks and tooling. Expect to contribute to API development, containerised applications, and cross-functional engineering initiatives. Must-Have Skills Strong commercial experience with Java Hands ...

Java Full Stack Engineer Location: UK (Hybrid, with flexibility for client site travel) Type: Permanent Clearance: Eligible for UK security clearance Join a leading global consultancy driving digital transformation across industries. As a Java Full Stack Engineer , you'll work on high-profile projects that combine cutting-edge … collaborative, client-facing environment while growing your skills in a fast-paced consultancy setting. What You'll Do Build and maintain microservices using Java (Spring Boot) . Develop front-end applications with React, TypeScript , HTML, and CSS. Work with cloud platforms ( AWS, Azure ) and containerization tools ( Docker, Kubernetes ). ...