6 of 6 Senior Java Developer Jobs in the City of London

Senior Java Developer - Java, Kotlin, Concurrency, Kafka, RDBMS, Unix, Linux, Front Office, Multi-threading Role Overview: I am seeking a Senior Java Developer to join a leading Investment Bank as part of their global front-office technology team. This is a hands-on position focused on working with a real-time, event-driven … components, ensuring the platform can scale to meet the growing demands of business event processing and data management. Key Responsibilities: Develop, implement, and maintain highly performant, secure, and scalable Java applications. Java Server Side Concurrent Programming with Spring Boot (Core Spring) Leverage Kafka or other message queue systems to handle asynchronous processing. Design, optimize, and maintain MongoDB (NoSQL … JUnit and other relevant frameworks. Take full ownership of feature development from design through to production deployment. Collaborate effectively with cross-functional teams, balancing independence and teamwork. Key Skills: Java Kotlin Concurrency Message-driven architectures - Kafka, MQ SQL Queries Unix/Linux scripting Multithreading This is a full time role offering a salary of up to £130k. You will More ❯

Senior Java Developer This is a hybrid role requiring 1/2 days per week in their London office. La Fosse are partnering with a market leading InsurTech provider who are in the market for a skilled Senior Java Developer to join the core software engineering team. This role provides a unique opportunity to … The work you do will span the full software development lifecycle, from idea to production, and you’ll be empowered to take ownership of complex engineering challenges. Key Requirements: Java Spring Boot AWS Excellent communication. Bachelors or Masters degree. Experience working at a start-up/scale-up. Compensation : This role is offering an incredibly competitive salary + extended More ❯

Senior Java Developer | Low Latency | London Our client is a specialist engineering consultancy known for solving some of the most demanding performance challenges across financial markets and technology. Their teams design, build, and optimise high-throughput, low-latency systems used by global institutions where reliability and speed are critical. They are now looking for exceptional Java … Location : Primarily Remote, with travel to London City at least twice per week. 💷Package : Highly competitive base + benefits What You’ll Do Design, build, and maintain high-performance Java applications used in demanding real-time systems. Develop and enhance testing and benchmarking frameworks to validate system performance. Identify and eliminate bottlenecks through systematic performance analysis . Contribute ideas … . A strong and proven track record developing low-latency, high-throughput systems on JVM. Understanding of JVM internals (GC, threading, concurrency, locking). Commercial experience with high-performance Java systems . Ability to communicate effectively with both technical and non-technical stakeholders. Ability to work confidently across existing and greenfield projects. Maintaining a high level of professionalism and More ❯

Job description Java Full-Stack Developer Location: London (Hybrid) Salary: £85,000 – £90,000 + benefits I’ve partnered with an exciting tech firm who are building software that transforms how stakeholders make important decisions. What started as a consultancy has evolved into a SaaS platform that helps organisations cut through hundreds of pages of board packs and … focus on what matters. Their products combine Java, AI, and modern web technologies to deliver clarity and speed for decision-makers. They’re estimated at nearly $30M, annually, and have 3 offices globally, with the view to grow their UK footprint. Having recently doubled down on AI-driven tools, they are tackling the biggest pain points stakeholders have, information … overload and poor decision-making efficiency. What You’ll Do Develop and enhance their core services built in Java (Spring Boot). Work on full-stack features using React (or similar modern JS frameworks). Collaborate on new product initiatives, including AI-powered tools. Contribute to architecture decisions and help shape the future Tech Stack Backend: Java (Spring More ❯

Job: Senior eFX Java Developer - Low Latency London, UK Hybrid working – 3 days on-site Full Time Overview This is a high-profile role working on the eFX Algo IT team. The team develops the pricing, hedging and low latency order and price distribution team systems for the eFX desk. The team consists of Java and … C# developers, developing server-side and UI components, respectively. This role is specifically a low-latency Java role, encompassing pricing work, hedging work, market connectivity work and associated services around that. It is a hands-on development role. As a team member, you would also be expected to contribute towards estimation and the ability to work with functions such … work within Credit Agricole's compliance culture is a base level requirement. Knowledge of FX or similar low latency trading systems is required. A high technical development ability in Java is also required. Familiarity with at least one delivery technique such as Agile, SCRUM, Kanban and similar would be a strong advantage. The position will also require a production More ❯

create and sustain competitive advantage. Experience Required: 8+ Years Contract Type: Inside IR35 Duration: 6 months to 12 months (possibility of extension) Job Overview: We are looking for a Java Engineer to join a high-performing team building low-latency, mission-critical applications. This is a contract role offering the opportunity to work on real-time, high-throughput systems … within a fast-paced and innovative trading environment. The ideal candidate will be an expert in reactive Java programming , multithreading, and clean software design, with the mindset to thrive in high-pressure, performance-driven teams. Roles and Responsibilities: Develop and maintain high-performance, low-latency Java-based systems for front office trading or pricing platforms. Build reactive systems … traders, and other developers in a fast-paced environment. Maintain a high level of code quality and technical standards under tight timelines. Key Requirements: 6+ years of hands-on Java development experience, preferably in front office systems (e.g., trading platforms, pricing engines, market data systems). Proven expertise in reactive programming (Kafka Streams, Akka, Vert.x, Flink). Solid understanding More ❯