1 to 25 of 199 Java Engineer Jobs in London

Senior Software Engineer - Java, Node.js & AWS Edinburgh, Leeds, Manchester or London Build software that matters. Shape the future of engineering. We're looking for an experienced Senior Software Engineer - Java, Node.js & AWS who is passionate about building scalable, high-quality software and helping teams grow. This … challenging assumptions, collaborating openly, and taking pride in delivering software that makes a real business impact. What You'll Do As a Senior Software Engineer - Java, Node.js & AWS, you will: Design, build and maintain scalable, secure and resilient backend systems using modern Java, Node.js and the Spring ...

Java Software Engineer – Java 11+, Spring, Spring Boot, Microservices, Kafka, Akka, Docker/Kubernetes, Real-time, TDD/BDD, Reactive Programming, MongoDB Payments A Senior Java Engineer with a background in finance/payments and experience working on distributed real-time systems is sought after … specialises in providing high performance technology solutions to global financial institutions (including several Investment Banks), primarily to augment their payments capabilities. As a Senior Engineer, you will join a new client implementation team working on client-based projects to implement and customise their core realtime payments processing solution,using ...

Full Stack Java Engineer Duration: ASAP - 31st December 2027 Workload: Full-time hours Setup: Freelance (Daily Rate/BV or ZZP) Sponsorship: Not Provided Location: Veldhoven, Netherlands (2 days per week onsite, 3 remote) Our client is seeking an experienced Full Stack Java Engineer to support … development and modernisation of a large-scale application platform hosting over 40 business-critical applications. Key Responsibilities Develop and maintain enterprise-grade Java and Angular applications. Contribute to the migration of legacy systems into modern Java/Angular solutions. Design, build, and optimise backend services using Java ...

Senior Java Engineer is required by this international distribution provider as they transform their tech stack and need someone to drive this across design, build and deliver greenfield services, whilst mentoring a small team as they cross-train into Java. You will lead the shift from Legacy code … modern JVM technologies, establish reference architectures, and mentor a transitioning engineering team. The Tech Stack & Methodology includes - Modern Java (Java 25), Micronaut, Netty, and PostgreSQL (JDBI/No ORM) Hexagonal architecture, Domain-Driven Design (DDD), and RabbitMQ messaging Complete production-scope ownership with cutting-edge AI coding agents ...

Java Quant Developer (Programmer Software Engineer Java Python Fixed Income Bonds Rates Credit Equities Commodities Securities Munis Municipals FX Equity Derivatives Quantitative Analysts Analysis Asset Manager Buy Side Investment Management Fund Hedge Fund Finance Front Office Trading Asset Manager Banking Pre-Trade Risk Pricing PnL) required … asset management client in London. You MUST have the following: Excellent experience as a Java Developer/Software Engineer/Programmer Strong Java- strong design, architecture and build experience An understanding of Fixed Income whether rates or credit markets, equities, commodities or FX markets Good ability ...

Latency Java Engineer Engineer the future of global finance. At Citi, our Tech team doesn’t just support finance – we are helping to redefine it. Every day, $5 trillion crosses through our network. We do business in 180+ countries operating at a scale few can match. From … 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 ...

Java Engineer - Market Data - LSEG/RTSDK Migration Permanent London - Hybrid 3 days per week Salary - £85K - £110K We are seeking an experienced Java Engineer with strong market data and electronic trading experience to support the modernisation of a Futures algorithmic trading platform. The role will … existing RFA market data usage and map functionality to RTSDK. * Assess differences in market data fields and behaviour across relevant exchanges. * Develop enhancements to Java applications and shared frameworks to support RTSDK. * Support a phased migration while maintaining compatibility and system stability. * Develop and execute automated, regression and integration ...

approach, you're comfortable engaging with clients, understanding their needs, and translating them into effective outcomes. The Role: We are seeking an experienced Senior Java Engineer to join our engineering team and play a key role in designing, developing, and maintaining scalable, high-performance applications. The ideal candidate … will have strong expertise in Java-based enterprise systems, cloud-native development, and modern software engineering practices. Experience with Artificial Intelligence (AI) technologies and AI-enabled applications is highly desirable. Key Responsibilities: Design, develop, test, and maintain enterprise-grade Java applications. Assist with technical design discussions and contribute ...

Title: Lead Modernization Engineer Java/Node.js Salary: Paying £75,000 - £85,000 per annum Location: Wembley London - 5 days on-site Our client, a well-established and diversified multinational organisation, is seeking a Lead Modernization Engineer Java/Node.js to join their team. Skills Solid … Experience in Java development with significant, demonstrable experience in Spring Boot and Microservices architecture - not just familiarity, but production ownership. Azure Integration: Proven experience building applications that consume Azure-native services, including Azure Key Vault for secrets, Azure Storage API, and Azure Service Bus for event-driven messaging. DevOps ...

Senior Java Engineer - Engine by Starling - London At Engine by Starling, we are on a mission to find and work with leading banks all around the world who have the ambition to build rapid growth businesses, on our technology. Engine is Starling's software-as-a-service (SaaS … more from the team in some case studies, below, and our work with Women In Tech . Day in the Life of a Software Engineer Running a Backend Team We are looking for engineers at all levels to join the team. We value people being engaged and caring about ...

Senior Java Developer Business Unit: FTSE Russell – Index Platform Company: London Stock Exchange Group (LSEG) About Us LSEG (London Stock Exchange Group) is more than a diversified global financial markets infrastructure and data business. We are dedicated, open-access partners with a dedication to excellence in delivering the services … everyone can grow, develop and fulfil your potential with meaningful careers. About the Role We are seeking a highly skilled and hands‐on Senior Java Engineer with AI proficiency to help build the next generation FTSE Russell Index Platform. This platform underpins the calculation and distribution of FTSE ...

Senior Java Engineer London – Canary Wharf FTC – 9 Months (starting in September) Up to 70K We’re working exclusively with a well-established financial services organisation that is looking to add an experienced Senior Software Engineer to their payment project. This is a great opportunity to join … Mentoring and supporting other engineers, encouraging knowledge sharing and continuous development. What We’re Looking For: 4-5 years hands-on experience working with Java and/or Kotlin Commercial experience with AWS (preferred), Azure or GCP. Experience working with CI/CD pipelines, DevOps practices and development automation. ...

Hiring: Lead Data Engineer (Java) Locations: Newcastle, Glasgow, Manchester, or London Clearance: Active SC Clearance is highly preferred (SC eligible candidates will be considered) Contract Duration: 13+ months Are you an expert Data Engineer with strong Java programming skills? Join our AI & Data team to design ...

Software Engineer - High-Performance Java/Low Latency Role Type: Contract (Inside IR35) Location: London, UK (Hybrid - 3 days per week in-office) Overview We are looking for a specialist High-Performance Java Engineer to join our team in London, focusing on the expansion of Agency … concurrent systems for agency liquidity expansion. Perform fine-grained JVM tuning, garbage collection (GC) optimization, and memory profiling to achieve ultra-low response times. Engineer low-level Java solutions utilizing JNI, Java Unsafe, or JNR-FFI for high-frequency processing. Collaborate across cross-functional engineering and risk ...

Lead Software Engineer - Java/Python LONDON, LONDON, United Kingdom Job Description Be an integral part of an agile team that's constantly pushing the envelope to enhance, build, and deliver top-notch technology products. As a Lead Software Engineer at JPMorganChase within Digital Markets Execution Technology … continuous improvement aligned to measurable outcomes Required qualifications, capabilities, and skills Formal training or certification on software engineering concepts and advanced applied experience in Java/Python Hands‐on practical experience delivering system design, application development, testing, and operational stability for mission‐critical platforms Advanced in one or more ...

Project description As a Senior Full Stack Java Engineer within the US Corporate Loans POD, you will design, develop, and deliver enterprise integration solutions connecting Loan IQ with upstream and downstream platforms. You will leverage modern cloud-native technologies, AI-assisted development tools, and Agentic AI practices … optimize application and integration performance. SKILLS Must have Core Engineering 8+ years of software engineering experience, ideally within Financial Services. Strong expertise in Java, Spring Boot, REST APIs, and distributed systems. Experience with Kafka, IBM MQ, or similar messaging technologies. Strong integration experience with Loan IQ, lending, banking ...

Senior Low Latency Java Engineer 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 … provide senior, low-latency systems and application framework engineering (skilled in Java, C++, 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 ...

Senior Java/Python Engineer London | Up to £775/day (Inside IR35) or £120,000 Base Salary 5 Days Onsite for the First 6 Months | 4 Days Thereafter This investments clientis investing heavily in a strategic platform build-out driven by T+1 settlement requirements and continued business … batch-driven processes towards a modern, event-driven platform, giving engineers the opportunity to have genuine influence over architecture and design decisions. Technology Stack Java Python Spring Boot Kafka Linux PostgreSQL AWS Microservices REST APIs What We're Looking For Capital Markets Technology Regulatory Reporting Finance Systems Trade Lifecycle ...

Senior Software Engineer - (Java/AI) Brokerage Services IG Group is a FTSE 100 fintech operating across five continents, serving over 1.4m customers and handling billions of dollars in transactions – built on scale, trust, and proof. We didn't pivot to innovation; it's how we've always … platform to define what comes next. Join us at IG – the future gets built here. Your team We’re looking for a Senior Engineer to join our Brokerage Services team to push hard on AI across Brokerage Services engineering: AI-assisted coding, testing and deployments, shift left on security ...

Place to Work-CertifiedTM company and has won Best Workplaces UK multiple years in a row. We're looking for an experienced Senior Fullstack Engineer who is passionate about building scalable, high-quality software and helping teams grow. This is more than a hands-on engineering role … delivering software that makes a real business impact. What You'll Do Design, build and maintain scalable, secure and resilient backend systems using modern Java and the Spring ecosystem, alongside rich, responsive frontends built with React. Lead technical design and architectural discussions, ensuring solutions are maintainable, performant and aligned ...

Citi is seeking a senior Low Latency Java Engineer to drive Java-based, low-latency systems for algorithmic trading. You will develop event-sourced microservices, influence architecture decisions, and collaborate with cross-functional teams in a high-performance London environment. You will mentor junior engineers while shaping ...

London Stock Exchange Group (LSEG) seeks a Senior Java Engineer with hands-on expertise in Java and Python to help build and operate the next generation FTSE Russell Index Platform. You will design, implement, and optimize AI-enabled features and large-scale index computations in a high ...

helped us scale to over 600 people in just a few years. About the role and team: We're looking for a Mid Software Engineer to join one of our client engineering teams, building backend services with modern Java and Spring Boot. You'll work closely with senior … client work that matters, with mentorship and support built in. What you'll be doing: Build and maintain backend features and RESTful APIs using Java and Spring Boot, working under the guidance of senior engineers. Write clean, well-tested code, applying unit and integration testing practices as part ...

Solirius Ltd. is seeking a Senior Java Engineer to join our engineering team in the UK. You will design, develop and maintain scalable Java applications with a focus on cloud-native microservices and modern software practices. AI-enabled capabilities are highly desirable as we explore advanced solutions. ...

offices and a robust customer base across North America, Europe, and Asia Pacific. Overview of the Role We are seeking a Senior/Intermediate Java Engineer to join our R&D team. The role focuses on backend and middleware development using Java 17 and Spring, working across … high-availability system with kdb+ integration and strong security requirements. Key Responsibilities Develop, maintain, and optimise Spring-based web applications and REST APIs using Java 17. Integrate backend services with real-time kdb+ environments. Implement authentication (SAML/LDAP) and secure authorisation (RBAC/ABAC). Participate in distributed ...