1 to 25 of 38 Java Engineer Jobs in London

Senior Java Engineer/Developer (AI) London/WFH to £110k Are you a technologist with a strong knowledge of AI and its practical uses within software engineering? You could be progressing your career in a senior, hands-on Senior Java Engineer role at a global FinTech/CFD trading company that has been consistently voted … networks with an annual budget for organising events and projects that foster an open, diverse and inclusive culture Plus a range of other perks Your role: As a Senior Java Engineer you'll join an experienced team working on AI innovation within the business. Your primary focus will be on using Claude code (and other AI tools and … City with an upbeat team environment, casual dress code and a range of facilities including roof terrace, restaurant and break out areas. About you: You have a strong backend Java software engineering skills You have a strong knowledge of modern software architecture, including microservices, APIs and Cloud technologies You have used AI tools in a large commercial enterprise e.g. More ❯

Java Engineer Salary to £60k + Company Options Scheme Hybrid working between your home, their offices (London Vauxhall) & client sites. NB: Please only apply if you are a UK National and able to achieve SC or DV clearance. (SC) 5 years & (DV) 10 years residency in the UK with no more than a 3 month break outside the … manage casework, derive insight from data and deliver citizen services. Theyre growing fast and looking for bright, dynamic people to help build their business. Role Theyre looking for a Java Engineer to join their implementation team. Youll work across Camunda BPMN/DMN process automation, API integration, and microservice orchestration helping their public-sector clients build secure, scalable … week. Client sites could be anywhere but will most likely be in & around London. Responsibilities Design, develop, and deploy Camunda-based process and decision automation solutions Implement and integrate Java-based microservices, APIs, and connectors within orchestration flows Translate BPMN and DMN models into executable workflows and reusable components Collaborate closely with analysts and service designers to refine and More ❯

Java Engineer • Salary to £60k + Company Options Scheme • Hybrid working between your home, their offices (London Vauxhall) & client sites. NB: Please only apply if you are a UK National and able to achieve SC or DV clearance. (SC) 5 years & (DV) 10 years residency in the UK with no more than a 3 month break outside the … derive insight from data and deliver citizen services. They’re growing fast and looking for bright, dynamic people to help build their business. Role They’re looking for a Java Engineer to join their implementation team. You’ll work across Camunda BPMN/DMN process automation, API integration, and microservice orchestration — helping their public-sector clients build secure … week. Client sites could be anywhere but will most likely be in & around London. Responsibilities Design, develop, and deploy Camunda-based process and decision automation solutions Implement and integrate Java-based microservices, APIs, and connectors within orchestration flows Translate BPMN and DMN models into executable workflows and reusable components Collaborate closely with analysts and service designers to refine and More ❯

Job Title: Mid-Senior Java Engineer Location: London (Hybrid - 2-3 days in-office) Salary: Up to £85,000 per annum + Benefits Sector: Financial Services About the Role: We are seeking a Senior-Level Java Engineer to join a dynamic financial technology team in London. You will play a key role in developing, maintaining, and … enhancing high-performance, scalable financial applications. This is a fantastic opportunity for an ambitious developer with experience in Java and a passion for the financial sector. The role follows a hybrid working model, with 2-3 days per week in the office. Key Responsibilities: Design, develop, and maintain high-quality Java-based applications for financial services. Collaborate with … in code reviews and provide constructive feedback. Stay updated with the latest financial technologies and industry trends. Key Requirements: Based in the London Area 5+ years of experience in Java development (Java 8 or later). Experience with Spring Boot, Microservices architecture, and RESTful APIs. Strong understanding of multi-threading, concurrency, and performance optimization. Knowledge of SQL and More ❯

Senior Java Engineer Location: London (x3 days a week onsite) Salary: Up to £80k DOE Type: Perm Job Description We are looking for a passionate Senior Java Engineer in London to lead the design and development of core product features and services that power an app used by thousands of travellers on a daily basis. As … a Senior Java Engineer for an loyalty program team, you will have the opportunity to make a massive impact on traveller's behaviour and booking experience. Specifically, you'll be responsible for driving improvements to loyalty offerings that enable millions of business & leisure travellers. What You'll Do: Designing and implementing APIs and core services Developing models and … company to design solutions to user problems Ability to thrive in a fast-paced environment Prior experience working at startups and/or on consumer-facing products Experience with Java, AWS and/or distributed systems is a plus Experience with Hibernate or similar ORM technologies is a plus Experience with Spring Framework is a plus More ❯

Java Software Engineer Java, J2EE, Spring, React, Node, SpringBoot, Hibernate, RabbitMQ, SQL We are seeking a Java Software Engineer with at least 5 years experience of working in a SaaS production environment. Our client is a leading provider of investment and wealth management solutions where you will joining a team of five who actively support … the development, enhancement and troubleshooting of Java applications. To be considered for this role you will need previous experience supporting financial applications in a production environment. Essential Skills: Technical experience with designing systems utilising OOAD, SOA, Java, J2EE, Spring, React.js, Node JS, Hibernate, SOAP/REST web services using XML/JSON, Spring security, SpringBoot and AMQP/ More ❯

Senior Java Engineer (Kubernetes, Kafka, SpringBoot) - Finance - London Daily rate: £550 - £750 (inside IR35) Duration: 12 months Hybrid: 8 days per month Start: ASAP A banking client of mine is looking for a Senior Java Engineer with Kafka and Docker skills to join the team on a freelance basis. Must be based in the UK and … Strong systems development experience at all stages of systems development covering design, development, testing, live implementation and post implementation support. Strong hands-on Object-Oriented Design skills Strong core Java programming skills Experience of developing services/micro-services in Java Experience of developing containerised services using Docker and Kubernetes Hands-on SpringBoot skills Experience of developing and More ❯

Senior Java Engineer (Kubernetes, Kafka, SpringBoot) - Finance - London Daily rate: £550 - £750 (inside IR35) Duration: 12 months Hybrid: 8 days per month Start: ASAP A banking client of mine is looking for a Senior Java Engineer with Kafka and Docker skills to join the team on a freelance basis. Must be based in the UK and … Strong systems development experience at all stages of systems development covering design, development, testing, live implementation and post implementation support. Strong hands-on Object-Oriented Design skills Strong core Java programming skills Experience of developing services/micro-services in Java Experience of developing containerised services using Docker and Kubernetes Hands-on SpringBoot skills Experience of developing and More ❯

Senior Java Engineer/Developer (AI) London/WFH to £110k Are you a technologist with a strong knowledge of AI and its practical uses within software engineering? You could be progressing your career in a senior, hands-on Senior Java Engineer role at a global FinTech/CFD trading company that has been consistently voted More ❯

Senior Java Engineer (Kubernetes, Kafka, SpringBoot) - Finance - London Daily rate: £550 - £750 (inside IR35) Duration: 12 months Hybrid: 8 days per month Start: ASAP A banking client of mine is looking for a Senior Java Engineer with Kafka and Docker skills to join the team on a freelance basis click apply for full job details More ❯

Java Engineer Salary to £60k + Company Options Scheme Hybrid working between your home, their offices (London Vauxhall) & client sites. NB: Please only apply if you are a UK National and able to achieve SC or DV clearance. (SC) 5 years & (DV) 10 years residency in the UK with no more than a 3 month break outside the More ❯

Full Stack Software Engineer Java React Banking London This is a new and exclusive opportunity for a Full Stack Software Engineer who is primarily front office focused with React (75%) and Java (25%) to join this thriving front office derivatives team in this investment bank Role details Title: Full Stack Software Engineer Technical focus - React … and Java (25%) Employer: front office banking derivatives Permanent role salary £70-85,000 plus bonus and pension Location: London City and home working hybrid 50/50% Technical stack: primarily React focused with a java base This is an AVP Banking front office Full Stack Software Engineer which is primarily GUI focused on React, 70% and … some back end with Java 30% This is a front office derivatives investment bank, and you will be working with international teams on big front office trading projects This role will be interviewed in December, and offer out in January Position Description Derivatives Front Office Full Stack Application We're looking for a Software Engineer for our front More ❯

Full Stack Software Engineer Java React Banking London This is a new and exclusive opportunity for a Full Stack Software Engineer who is primarily front office focused with React (75%) and Java (25%) to join this thriving front office derivatives team in this investment bank Role details Title: Full Stack Software Engineer Technical focus - React … and Java (25%) Employer: front office banking derivatives Permanent role salary £70-85,000 plus bonus and pension Location: London City and home working hybrid 50/50% Technical stack: primarily React focused with a java base This is an AVP Banking front office Full Stack Software Engineer which is primarily GUI focused on React, 70% and … some back end with Java 30% This is a front office derivatives investment bank, and you will be working with international teams on big front office trading projects This role will be interviewed in December, and offer out in January Position Description Derivatives Front Office Full Stack Application We're looking for a Software Engineer for our front More ❯

QA Engineer (Java) | Fintech Trading £70,000 - £80,000 + Bonus + Benefits Hybrid - 3 days/week in Central London Join a collaborative, engineering-led team ensuring the stability and performance of a high-volume, global electronic trading platform. You'll write clean, quality Java-based automation code to contribute to an internal Java-based … test automation framework, catching issues before they hit production and helping deliver flawless, high-performance user experiences. What You'll Do Build and maintain robust Java test automation Work on an internal Java-based test automation framework used across all teams handling high-traffic, real-time trades. Collaborate with developers to improve quality at every stage. Own QA … processes for performance, reliability and user experience. What You Bring Strong experience with Java automation testing & backend testing. Background in automation testing for complex, high-performance platforms. Passion for quality and attention to detail in fast-paced environments. BONUS POINTS: Experience in electronic trading, FX, banking or fintech domains Shape the quality of software that millions of trades rely More ❯

Job Title: Mid-Senior Java Engineer Location: London (Hybrid - 2-3 days in-office) Salary: Up to £85,000 per annum + Benefits Sector: Financial Services About the Role: We are seeking a Senior-Level Java Engineer to join a dynamic financial technology team in London. You will play a key role in developing, maintaining, and More ❯

eFX Software Engineer (Ultra-Low Latency Java) Hybrid/Remote - London Up to £160,000 + Bonus + Benefits We're supporting a major financial services organisation hiring an eFX Software Engineer to build and optimise ultra-low-latency trading systems used across global FX markets. If you're a high-performance Java engineer who … opportunity. What you'll work on: Engineering sub-40μs latency eFX systems with high throughput and fault tolerance Designing real-time pricing, risk and trading components Evolving low-latency Java patterns (lock-free, low-GC, CPU/cache optimisation) Working closely with quants, traders, architects and senior engineers Influencing technical strategy across distributed, performance-critical systems What we're … looking for: Strong experience in low-latency Java within trading, eFX or electronic markets Deep understanding of networking (TCP/UDP/FIX), Linux tuning, performance profiling Background in designing high-performance architectures and distributed systems Strong grasp of FX pricing, risk, and trading workflows Solid engineering fundamentals: testing, CI/CD, API design, automation Why join? Work on More ❯

Senior Low Latency Java Engineer (SVP) This is a senior level position responsible for establishing and implementing new or revised application systems and programs in coordination with the Technology Team. The overall objective of this role is to lead applications systems analysis and programming activities. The role is to provide senior, low-latency systems and application framework engineering … skilled in Java, C++ , Rust, KDB, market data, algorithmic trading technology) within the London Based High Performance Architectures (HPA ) team. The team require a specialist on algorithmic trading systems utilities including but not limited to market data replay and back test/simulation utilities. The HPA organisation are a high skilled enablement group of Subject Matter experts - who produce … with application engineers to enable application Modernisation to over 100 teams across Citi with a concentration on low latency eTrading platforms in Markets Technology. Responsibilities: 90% hands in the Java codebase. We build microservices based event sourcing systems on a low latency in-house framework. Response times in the 10 microsecond to 100 microsecond range. Lead integration of functions More ❯

Currently hiring a Senior Java Engineer to join a fixed income trading team - a high-performing group responsible for building and maintaining global trading systems used daily by traders and middle office teams. These systems handle complex financial instruments, from bonds and repos to interest rate swaps and exotic portfolios, with a strong focus on performance, reliability, and … traceability. Key Responsibilities: Design, develop, test, and deploy high-quality software using Java and related technologies Conduct code reviews, ensuring clean, maintainable, and efficient code Mentor junior developers and promote technical excellence within the team Analyse and resolve performance, scalability, and concurrency issues Contribute to Agile/Scrum processes, including sprint planning and retrospectives Maintain clear and comprehensive technical … documentation Key Requirements: Strong expertise in Core Java, including multi-threading and concurrency demonstrating self-sufficiency Proven experience in low-latency systems, performance tuning, and network programming Familiarity with high-performance messaging systems Proficiency with profiling, benchmarking, and memory analysis tools Working knowledge of Linux/Bash scripting and at least one other language (e.g. Python or C#) Robert More ❯

Currently hiring a Senior Java Engineer to join a fixed income trading team - a high-performing group responsible for building and maintaining global trading systems used daily by traders and middle office teams. These systems handle complex financial instruments, from bonds and repos to interest rate swaps and exotic portfolios, with a strong focus on performance, reliability, and … traceability. Key Responsibilities: Design, develop, test, and deploy high-quality software using Java and related technologies Conduct code reviews, ensuring clean, maintainable, and efficient code Mentor junior developers and promote technical excellence within the team Analyse and resolve performance, scalability, and concurrency issues Contribute to Agile/Scrum processes, including sprint planning and retrospectives Maintain clear and comprehensive technical … documentation Key Requirements: Strong expertise in Core Java, including multi-threading and concurrency demonstrating self-sufficiency Proven experience in low-latency systems, performance tuning, and network programming Familiarity with high-performance messaging systems Proficiency with profiling, benchmarking, and memory analysis tools Working knowledge of Linux/Bash scripting and at least one other language (e.g. Python or C#) Robert More ❯

Are you a Java Full Stack Engineer looking to work on cutting-edge, high-impact digital solutions? Do you want to use your expertise to help shape major transformation programmes across government and secure environments? If you're driven by innovation, value collaboration, and enjoy solving complex technical challenges, we'd love to hear from you. Java Full Stack Engineer (DV Cleared) Consultant Level - Digital Excellence Salary: £46,330-£55,000 Base Locations: London, Manchester, Newcastle or Glasgow Organisation : Global leading IT Consulting Business (Applicants must hold active DV clearance) Are you a Java Full Stack Engineer looking to work on cutting-edge, high-impact digital solutions? Do you want to use your … secure environments? If you're driven by innovation, value collaboration, and enjoy solving complex technical challenges, we'd love to hear from you. The Role As a DV Cleared Java Full Stack Engineer, you'll turn visionary ideas into real-world solutions for clients tackling some of the UK's most complex challenges. You'll design and build More ❯

Role: Software Engineer (Java) Location: London Salary: Competitive salary and package (Depending on level of experience) Any offer of employment is subject to satisfactory BPSS and the candidate being granted a level of security clearance which typically requires 10 years continuous UK address history, usually including no periods of 30 consecutive days or more spent outside of the More ❯

You'll work on a wide variety of projects and gain exposure to technologies including Java, Kotlin, NodeJS, Spring Boot, RESTful microservices, React, NoSQL databases and cloud platforms. Java Full Stack Engineer - Consultant/Senior Consultant Salary: £45,000-£70,748 Base locations: London, Manchester or Glasgow (Hybrid working) Organisation : Global IT Consultancy Are you a passionate … Java Full Stack Engineer looking to build modern, impactful digital solutions across a range of transformation programmes? This is an opportunity to join a dynamic, fast-growing engineering community where you'll work with cutting-edge technologies and deliver meaningful outcomes for clients across the UK. About the Role As a Java Full Stack Engineer, you … best practice, innovation and a consultative mindset to shape solutions from end to end. You'll work on a wide variety of projects and gain exposure to technologies including Java, Kotlin, NodeJS, Spring Boot, RESTful microservices, React, NoSQL databases and cloud platforms. This role is ideal for engineers who enjoy variety, value continuous learning and want to push forward More ❯

Lead Java Developer - Electronic Trading | London | Up to £165k + Bonus A leading financial institution is hiring a Lead Java Developer to join their Equities Cash Technology team in London. This is a high-impact role focused on building and enhancing low latency trading platforms that support benchmark algos, smart order routing, and internal crossing across EMEA and … global markets. What's on offer: Up to £165k base salary + ~20% bonus Hybrid working: 3-4 days/week in the office Cutting-edge Java-based platform with high throughput and low latency Collaborative environment with quants, traders, and global tech teams Modern office near St. Paul's Cathedral with rooftop views, gym, and sustainable dining What … you'll bring: Deep Java expertise (collections, concurrency, NIO, GC tuning) Experience with multithreaded systems and low latency I/O Strong understanding of equities/derivatives markets and algo strategies (VWAP, TWAP, Arrival Price) Familiarity with FIX protocol, agile methodologies, and modern dev tools Ability to mentor junior developers and contribute across the SDLC This is a fantastic More ❯

is comfortable working with existing technologies while contributing to the modernisation of critical banking systems. The position spans the full software development life cycle, with core technologies centred on Java and React, and suits a developer who values building robust, scalable solutions rather than focusing on the latest trends. The successful candidate will join a new, dynamic team and … thrives on responsibility, and understands the importance of delivering high-quality outcomes for both the team and the wider business. They will be expected to collaborate closely with Senior Java and React Developers, UI/UX specialists and Agile Transformation functions to help architect and deliver applications in line with best design and development practices. Operating in an Agile … client-side development experience with HTML5, CSS3, Sass/Less, JavaScript (ES9/2018), TypeScript, RESTful APIs, React and Webpack, as well as mature server-side coding skills using Java 11+ and SQL (DB2, SQL Server or Postgres preferred). A solid understanding of design patterns, microservices architecture and RESTful API development is required, along with the ability to More ❯

We are hiring an experienced Senior Software Engineer with deep expertise in ultra-low-latency, high-throughput Java systems . This is a role for someone who builds systems that push performance boundaries, not just enterprise-grade services. You'll join a specialist engineering group designing fault-tolerant, sub-40s latency pipelines, shaping architecture decisions and solving complex … technical challenges that require first principles thinking. What You'll Be Working On Designing and optimising high-performance Java services with lock-free, zero-allocation and low-GC approaches. Hardware-aware optimisation including CPU architecture, cache behaviour, kernel tuning, core pinning and memory layouts . Building and improving ultra-low-latency messaging pipelines (Multicast, TCP, IPC). Working directly … leadership on system architecture and performance strategy. Driving technical direction and mentoring senior members of the team. What We're Looking For 10+ years professional engineering experience with core Java in latency-sensitive environments. Strong knowledge of: Ring buffers Off-heap/zero-allocation techniques IPC and high-performance networking Linux kernel optimisation Domain experience in eTrading, market-making More ❯