26 to 41 of 41 Java Developer Jobs in London

at a Tier-1 Investment Bank, delivering next-generation algorithmic trading systems across benchmark, smart order routing, and internal crossing strategies. The Role You'll work as a Core Java Developer within a high-performing Algo Engineering group, responsible for evolving a suite of low-latency, high-throughput trading engines that power the firm's EMEA and global … testing, deployment, and 2nd-line support Deliver framework-level improvements for throughput, resilience, and scalability Participate in peer reviews, mentoring, and agile ceremonies Required Skills & Experience Expert-level Core Java (collections, concurrency, NIO, memory management) Strong understanding of multithreaded systems and low-latency I/O Deep familiarity with design patterns (Observer, Factory, Singleton, etc.) Experience with TDD , GIT More ❯

About the Role We are looking for an experienced Senior Java Developer with strong expertise in building modern APIs and microservices, ideally with hands-on experience integrating with NHS Digital platforms such as NHS Spine, FHIR APIs, or other healthcare interoperability services. You will play a key role in designing scalable, secure, high-performance services that power mission … critical applications within the healthcare technology landscape. Key Responsibilities * Design, develop, and maintain RESTful APIs and microservices using Java and Spring Boot . * Implement scalable, secure, and highly available solutions for enterprise and healthcare applications. * Integrate backend services with NHS Digital systems , including FHIR resources, HL7 messaging, NHS Spine services, and other interoperability standards. * Collaborate closely with architects, product … code reviews, support engineering excellence, and mentor junior developers. * Ensure compliance with security standards , data protection regulations, and NHS Information Governance requirements. Required Skills & Experience * 5+ years of professional Java development experience (Java 11+). * Strong expertise with Spring Boot , Spring Cloud, and distributed microservices. * Proven experience designing and building RESTful APIs. * Experience working with NHS Digital services More ❯

Senior Java Engineer Location: London (1-2 days a week in the office, mandatory on Thursdays) Experience: Minimum 8-10 years Technical Skills: Proficiency in Java 8 (transitioning to Java 17) Retail banking experince Python Experience with Spring Boot 2.4 and above Knowledge of Continuous Integration Apigee Java Testing API experience If all the above skills More ❯

Chicago. We pride ourselves on a diverse, friendly, dynamic culture - with a focus on internal promotion and developing our people. Scope of Role ITRS Group is looking for Senior Java Engineer in London. Reporting to our Engineering Manager, you will sit in the Platform Team and form part of a wider global Engineering Team. The Core Platform layer is … in anticipation of wider customer adoption through 2025. Our role offers a permanent, full-time position working from our London office on a hybrid work schedule. As a Senior Java Software Engineer, you will: Participate in all phases of the product lifecycle, including design, development, documentation, testing, integration, deployment, and ongoing support. Participate in mentoring relationships - both giving and … ongoing personal growth. There will always be opportunities requiring it. We have an ambitious L&D policy to support your learning and growth Requirements You are predominantly a backend Java developer with at least 7 years of experience building complex distributed systems. You have built applications from the ground-up with a deep understanding of core Java More ❯

We are working with a large, well-established bank undergoing a significant transformation of its core platforms, and we are seeking a Full Stack Developer—more heavily focused on backend engineering—to support this journey. This role is ideal for someone who 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 take ownership of designing and developing solutions from the ground up. This position is ideal for … a developer who enjoys working with both greenfield and brownfield systems, 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 More ❯

Graduate/Junior Developer, Python, Linux, C#, Java - London (Teck stack: Graduate/Junior Developer, Python, Linux, C#, Java, .NET 9, C#, J2EE, Agile, TDD, BDD, Graduate/Junior Developer) Since 2006 our client's revolutionary marketing software platform has been helping businesses all over the world to attract, engage, and delight 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 to make decisions about what should be created, and how it should be … They believe that problems are solved with technology and experience, not process, and that mistakes are a normal part of learning. These roles would be suitable Graduate/Junior Developer who have recently graduated from university and have a basic understanding of any of the following technologies: Python, Linux, C# or Java; which might have been acquired as More ❯

clients. Solution is scalable to cover multiple locations and meet latency requirements. Team is growing fast and now we are looking for a strong and motivated FX Risk Lead Java Developer. Key Responsibilities Design, develop, and maintain Java-based microservices for high-throughput application Integrate and optimize Apache Ignite based solution: in memory data grid for FX trades … pipelines Conduct performance tuning, code reviews, and troubleshooting production issues Document system architecture, design decisions, and development processes What we want from you Strong hands-on experience with Core Java and multithreading in high load system Practice with JVM performance optimization and memory profiling Familiarity with distributed systems architecture and in-memory computing concepts Proven experience with in-memory More ❯

faster, eliminating waste and applying this across the entire software delivery lifecycle for both internal customers and end users. Your skills and experience What you'll bring: * Experience of Java * Experience of Spring framework or equivalent. * Knowledge of software design patterns and when to apply them * Excellent knowledge of development processes. * Experience of containerisation using Docker or Kubernetes * Experience More ❯

the design, development, and deployment of high-quality software solutions. As a key member of the engineering team, you will be responsible for developing robust and scalable applications using Java , working within a Linux environment, and leveraging the power of Amazon AWS cloud infrastructure . Youll apply Test-Driven Development (TDD) or Behavior-Driven Development (BDD) principles to ensure … quality code that meets business objectives. Were seeking someone who takes pride in writing clean, well-documented, and testable code, with solid experience in unit and component testing. While Java expertise is essential, familiarity with Ruby and Python will be considered an advantage. Experience or interest in video technologies and video streaming/packaging would also be beneficial. If … and component test experience. Desirable Skills/Knowledge/Experience Experience in Ruby and Python will be an advantage. Knowledge on video and video streaming, packaging. Tools and Technology Java Ruby Python AWS TDD Experience A degree in Computer Science, Software Engineering, or a related field or similar work-based experience. Proven experience as a Mid-Level Software Developer More ❯

month contract - Inside IR35 - Investment Banking, London Job Purpose In support of the Securitisation business, the developer will be responsible for: * Development of functional features or fix bugs on MyCreditApp application (target securitisation application) * Contribute to maintaining and improving quality and performance of the application * Maintain and support existing securitisation system for credit approval and capital calculation. Core accountabilities … the IT applications support * Follow the Agile methodology * To Contribute to continuous improvement plans throughout the product lifecycle, particularly during team retrospectives Knowledge, Skill and Experience * Proven experience of Java, Spring and Hibernate * Proven experience of Angular, Javascript, HTML5, CSS, RESTful services * Proven experience of Oracle database * Proven experience of testing framework using Junit 5 * Experience in cross-platform More ❯

re listed on the London Stock Exchange and operate in 13 countries — and our success is powered by exceptional people. We’re now looking for a talented team-oriented developer who thrives in a collaborative environment, enjoys solving complex technical challenges, and wants to make an impact in a fast-paced, global setting. Join our Pricing & Risk team , working … in coding standards, code reviews, and release management. Respond to real-time trading issues in a fast-paced environment, ensuring minimal business disruption. Key Skills & Experience: Strong expertise in Java , Spring Framework/Spring Boot , or similar backend frameworks. Proven experience designing and developing API-based, microservices-driven architectures . Solid understanding of low-latency, multi-threaded systems and More ❯

venues (e.g., Tradeweb, Bloomberg, MTS, BrokerTec, MarketAxess). Configure and support FIX, streaming, and venue-specific protocols, ensuring accurate and reliable messaging. Develop high-performance, scalable services using Core Java (8/11/17) . Build and enhance components for pricing, order routing, and execution workflows. Apply low-latency, event-driven, and asynchronous design patterns to improve throughput … Conduct latency tuning, load testing, and system optimization. Collaborate with SRE/DevOps teams to improve observability, CI/CD, and deployment pipelines. Key Requirements: Strong expertise in Core Java, including concurrency, memory management, and GC tuning. Hands-on experience integrating and developing with TransFICC’s Connectivity Platform. Experience with electronic market protocols: FIX (4.x/5.x) Market-specific More ❯

A leading IT Consultancy is seeking a Java API Microservices Developer on a contract basis to work for a leading bank. This role is full time onsite in London Monday-Friday. Please DO NOT apply unless you can work onsite full time. We are seeking a highly skilled Java API Microservices Developer. The ideal candidate will have … focused on common goals. We embrace a culture of experimentation and constantly strive for improvement and learning. You will work in a collaborative, trusting, thought provoking environment Experience Required: Java 17 (using Spring technology stack) Strong understanding of micro-service design pattern Proficient in database SQL and modelling Advanced knowledge of application, data, and infrastructure architecture disciplines Understanding of More ❯

at the intersection of technology and financial markets, collaborating with experts across the region to deliver impactful solutions. Key skills required for this role include: Advanced experience in Core Java – Hands-on expertise in multithreaded programming and zero garbage collection (GC) principles. Proven track record in building distributed systems, specifically for trading or risk management applications. Deep understanding of More ❯

cutting-edge solutions across FX Spot, Forwards, and Pricing, with exposure to Rates and Cross-Asset projects further down the line. Key Responsibilities Design and develop ultra-low latency Java systems for electronic FX trading. Work closely with traders and quants to deliver performant pricing and hedging solutions. Lead components of system re-architecture and optimisation projects. Take ownership … of end-to-end performance, from network to JVM tuning. Contribute to a high-performing, globally distributed engineering team. Technical Environment Core Java, Aeron, lock-free/concurrent programming High-performance messaging, distributed systems, and low-latency design Real-time pricing, RFQ, and automated hedging systems What We’re Looking For Proven experience designing or building low-latency trading … systems (FX or other asset classes). Deep understanding of Java performance tuning, GC optimisation, and threading models. Ability to discuss design decisions and architecture in depth. Front-office experience and a strong understanding of electronic trading workflows. Why Apply? Greenfield build, real technical ownership and impact. Highly technical front-office role with direct business interaction. Competitive package up More ❯

Location London Hybrid 1-2 days a week in the office eligibility to work in the UK Role Overview Were looking for two talented Software Developers to join our dynamic team based in London. This is an exciting opportunity to More ❯