51 to 75 of 94 Senior Java Engineer Jobs in London

Senior Java Low Latency Engineer (VP) – London Overview Citi is a world-leading global bank. We have approximately 200 million customer accounts and a presence in more than 160 countries and jurisdictions worldwide. We provide consumers, corporations, governments, and institutions with a broad range of financial products … core team of expert engineers within Citi have developed a framework, toolset and collection ofcomponentsfor building self-healing, scalable, high performance,asynchronous, event driven, Java Microservices based solutions. This framework, known as Ambrosia, has solved all the hard problems of failover, high availability, performance and scalability, so that application … take performance to the next level. Ambrosia is a core framework, toolset and collection ofcomponentsfor building self-healing, scalable, high performance,asynchronous, event driven, Java Microservices based solutions. We build microservices based event sourcing systems on a low latency in-house framework. Response times in the 10 microsecond to More ❯

Senior Software Engineer – Shape the Future of Payments We're hiring on behalf of an innovative payments technology company building the next generation of merchant-first systems. If you're a backend-focused engineer who values autonomy, clarity of purpose, and building products that matter, read on. … Own projects end-to-end — from concept to deployment What You Bring 5–8 years of software engineering experience Strong hands-on experience with Java and backend system design Familiarity with systems integration, messaging middleware, and distributed architecture A pragmatic mindset — you balance clean design with delivering value fast More ❯

An investment bank is looking for a Senior Java developer to join the front-office trading team with a large-scale migration to AWS. You will be joining the team to help coach and mentor on AWS services/products and best practices. The direction is simplification and … Duration: 1 year (potential to be 2 years) Location/Hybrid: X3 per week to the City of London (not negotiable) Requirement: Must have senior experience in Java, using the latest versions (V17+) Strong and demonstrable experience with AWS (EKS, Fargate/RDS, EC2, Lambdas) Preferred experience supporting More ❯

Job Description Are you a seasoned engineer looking to step into an environment that will see you using your experience to lead in the build of the firms core flagship product? You will be joining the lean but highly technical team at a crucial time with plans to scale … is already being utilised by many of the tier-1 players in the institutional trading world to solve complex challenges surrounding execution. As a Senior Engineer, you'll be responsible for building out new features of this core product, working with other engineers and product leads to develop … sophisticated, event-driven architecture. You'll have strong knowledge of all things Java with a strong background in real-time, distributed systems. Coming from a background working with trading technology, you'll also likely have experience with FIX and scripting with a focus on performance. Being a remote-first More ❯

Role: Senior (Java) Backend Engineer I Location: London (Hybrid) Reports to: Engineering Manager The role We are on a mission to make home moving easier and simpler. Home movers across the UK spend more than a billion minutes on Rightmove each month and our website and apps … in a way which ensures maintainability, scalability and high-performance standards. What you'll be doing Developing features and improvements to our applications using Java, Spring Boot, Elasticsearch, Kafka, Gradle, Hibernate, Couchbase, SQL, Docker • Collaborating with internal contacts and the teams to find solutions to complex problems. Taking ownership … environment with a sense of achievement, success, pride, and ownership. We're looking for someone who Has extensive commercial experience of writing applications with Java, Springboot and Kafka. Has been the lead on technically complex projects where you have assigned work to multiple engineers. Has strong coordination and collaboration More ❯

Senior Lead eSoftware Engineer - Equities Algo Trading - Java - VP Join to apply for the Senior Lead eSoftware Engineer - Equities Algo Trading - Java - VP role at JPMorgan Chase . Job Description We have an opportunity to impact your career and provide an adventure where you … can push the limits of what's possible. As a Senior Lead Software Engineer at JPMorgan Chase within the Equities Trading Technology Organization, you will be an integral part of an agile team that enhances, builds, and delivers trusted market-leading technology products in a secure, stable, and … advice, raises capital, manages risk, and extends liquidity across more than 100 countries, serving corporations, governments, and institutions globally. Seniorities and Employment Type Mid-Senior level Full-time Job Function Engineering and Information Technology #J-18808-Ljbffr More ❯

from seasoned technology and business professionals, and doing business with the world's largest, most influential banks and enterprise organizations. About the role: The Senior Java Developer is a member of a small, highly focused team, responsible for building services for highly scalable and robust messaging, data acquisition … and archiving systems, using leading edge technologies. This is an opportunity to work alongside some of the best Java developers in London and apply your craft in an environment that encourages creative thinking and autonomy. We encourage our developers to think beyond a single component to build complete system … Migrate existing services to microservices, with the goal of reducing complexity at the design and architecture level Write unit and integration tests for your Java code Collaborate with testers in development of functional test cases Develop deployment systems for Java based systems Collaborate with product owners on user More ❯

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 … multitude of problems and challenges, who can work across teams do great things here at Engine, to continue changing banking for good. As a Senior Engineer you will: Have the opportunity to lead projects or functional areas/domains within the Engine team and platform. As an Engineer … aptitude and attitude than specific experience or qualifications. We are very open about how we deliver software. For the most part, we code in Java, but you need not be an expert when you join us! We believe in clean coding, simple solutions, automated testing, and continuous deployment. If More ❯

Senior Software Engineer with Python and Java Our Client is looking to recruit brilliant Software Engineer with upwards of 5 to 10 years solid proven track record of developing complex applications with Python coupled with Machine Learning and ideally Go. We’re looking to recruit initially … very interested to see your profile. Must be 100% trustworthy with real integrity ?" this is a highly sensitive project. Key skills: Python, Machine Learning, Java The Client would like to see solid expertise of working with and developing complex applications with Java. Excellence is vital. Ideally have security clearance. More ❯

will be required to work in Reading and/or London 2/3 days a month. Your future duties and responsibilities: As a Senior Software Engineer you’ll join a flagship UK Government programme working on a project that helps protect UK citizens’ lives. Working as part … of a well-functioning team, you'll immediately add Java expertise at an important stage of the project cycle. You’ll also discover: • A unique level of variety across different clients and industry sector. • Further interesting and challenging projects to stretch your skills • Training and support specifically tailored to … discussions, and shared best practice Required qualifications to be successful in this role: Essential skills to be successful in this role: • Broad knowledge of JAVA/JAVA EE - current and legacy versions, including best practices and patterns for code migrations • Knowledge of best practices regarding continuous Integration/ More ❯

Senior Software Engineer, Data Processing Performance, Java/C++ October 19, 2023 United Kingdom Remote Full-time Flexible Hours ABOUT XONAI We are a team of passionate engineers committed to building the best-in-class petabyte-scale data infrastructure optimization platform that combines hardware acceleration with performance … support to our customers, and expand our solution to new markets. To learn more about us, visit our blog. About the role As a Senior Software Engineer for this role, you will collaborate with the founding team to expand the integration of our custom compiler with the query … transforming 10s of petabytes every day where Xonai is being deployed. What you will do Implement extensible optimizations for data processing algorithms mainly in Java but also C++. Implement code generation (targeting a custom DSL) for individual SQL operations. Establish rigorous benchmarking standards to assess the impact of performance More ❯

London, Canary Wharf (Hybrid) Engagement: Long-term engagement within one of the world’s most prominent banking institutions This is more than just a Java development job — it’s an opportunity to work at the core of a global financial powerhouse, supporting a large-scale transformation of how secure … London’s iconic Canary Wharf, with a hybrid model that supports flexibility and work-life balance. If you're passionate about writing clean, modern Java code and want to see your work used at a global scale, this is the kind of long-term project that builds real career … momentum. What You’ll Do 🔹 Develop and maintain internal Java-based tools and microservices that improve how developers build secure applications 🔹 Contribute to enterprise-wide initiatives around software composition analysis and supply chain transparency 🔹 Work closely with platform engineers, security experts, and software developers across multiple regions 🔹 Help standardize More ❯

London, Canary Wharf (Hybrid) Engagement: Long-term engagement within one of the world’s most prominent banking institutions This is more than just a Java development job — it’s an opportunity to work at the core of a global financial powerhouse, supporting a large-scale transformation of how secure … London’s iconic Canary Wharf, with a hybrid model that supports flexibility and work-life balance. If you're passionate about writing clean, modern Java code and want to see your work used at a global scale, this is the kind of long-term project that builds real career … momentum. What You’ll Do 🔹 Develop and maintain internal Java-based tools and microservices that improve how developers build secure applications 🔹 Contribute to enterprise-wide initiatives around software composition analysis and supply chain transparency 🔹 Work closely with platform engineers, security experts, and software developers across multiple regions 🔹 Help standardize More ❯

London, Canary Wharf (Hybrid) Engagement: Long-term engagement within one of the world’s most prominent banking institutions This is more than just a Java development job — it’s an opportunity to work at the core of a global financial powerhouse, supporting a large-scale transformation of how secure … London’s iconic Canary Wharf, with a hybrid model that supports flexibility and work-life balance. If you're passionate about writing clean, modern Java code and want to see your work used at a global scale, this is the kind of long-term project that builds real career … momentum. What You’ll Do Develop and maintain internal Java-based tools and microservices that improve how developers build secure applications Contribute to enterprise-wide initiatives around software composition analysis and supply chain transparency Work closely with platform engineers, security experts, and software developers across multiple regions Help standardize More ❯

Job Title: Java Developer (Electronic Trading Platform - FIC) Contract Type: Outside IR35 Location: London Day Rate: Up to £850 per day Flexible Hybrid working: 1-2 days a week in London City offices Client: Prestigious Investment Bank Industry: Investment Banking Duration: 12 months + Overview: We are seeking an … experienced Java Developer to join a high-profile investment banking client in London on a contract basis. The successful candidate will work on an Electronic Trading Platform for the FIC business . This is an exciting opportunity to contribute to the development and integration of advanced trading technologies in … making capabilities. Integrate with Instrumentation Platforms : Integrate the platform with Prometheus and Geneos for continuous monitoring, diagnostics, and system health checks. Desired technical Skills: Java Expertise: Extensive experience with Core Java , focusing on low-level performance tuning, multithreading , and garbage collection optimization . FIC or similar business knowledge More ❯

Job Title: Java Developer (Electronic Trading Platform - FIC) Contract Type: Outside IR35 Location: London Day Rate: Up to £850 per day Flexible Hybrid working: 1-2 days a week in London City offices Client: Prestigious Investment Bank Industry: Investment Banking Duration: 12 months + Overview: We are seeking an … experienced Java Developer to join a high-profile investment banking client in London on a contract basis. The successful candidate will work on an Electronic Trading Platform for the FIC business . This is an exciting opportunity to contribute to the development and integration of advanced trading technologies in … making capabilities. Integrate with Instrumentation Platforms : Integrate the platform with Prometheus and Geneos for continuous monitoring, diagnostics, and system health checks. Desired technical Skills: Java Expertise: Extensive experience with Core Java , focusing on low-level performance tuning, multithreading , and garbage collection optimization . FIC or similar business knowledge More ❯

FDM is a global business and technology consultancy seeking a Java Software Developer to work for our client within the finance sector. This is initially a 6-month contract with the potential to extend and will be a hybrid role that will be based in London. Our client is … seeking an experienced Java Software Developer who has experience in Trade Capture, Settlements, Risk/PnL across any asset classes. The successful candidate will join a team of 8 developers working on the new Trade Capture and PnL platform which is written in Java17 and utilises Kubernetes, Kafka and … all trade capture, lifecycle and PnL functionality from the existing legacy tech stack on to the new platform. Responsibilities Develop and maintain high-performance Java applications Deliver a result that will require little if any developer involvement post go-live Troubleshoot and optimise code to ensure efficiency and scalability More ❯

FDM is a global business and technology consultancy seeking a Java Software Developer to work for our client within the finance sector. This is initially a 6-month contract with the potential to extend and will be a hybrid role that will be based in London. Our client is … seeking an experienced Java Software Developer who has experience in Trade Capture, Settlements, Risk/PnL across any asset classes. The successful candidate will join a team of 8 developers working on the new Trade Capture and PnL platform which is written in Java17 and utilises Kubernetes, Kafka and … all trade capture, lifecycle and PnL functionality from the existing legacy tech stack on to the new platform. Responsibilities Develop and maintain high-performance Java applications Deliver a result that will require little if any developer involvement post go-live Troubleshoot and optimise code to ensure efficiency and scalability More ❯

thousands of savers. We’re regulated by the Financial Conduct Authority in the UK. The role: We’re looking for an experienced and driven Senior Backend Engineer to join our growing fintech team. This is more than just a coding role - we want someone who is curious, self … who thrives on solving complex problems and influencing technical direction. Requirements: What we expect of you: Strong object-oriented design and development experience in Java, ideally utilising Micronaut or Spring Boot frameworks Experience of designing and building service-oriented and event-driven architectures Demonstrable experience of leading others in More ❯

building software in a fast-paced, results-driven environment—preferably with SaaS platforms. - Proficiency in full-stack development and experience with modern languages (e.g., Java, Typescript/JS, mySQL/Posgres, MongoDB), always ready to dive in and code when needed. - Strong background in cloud technologies (AWS) and microservices More ❯

an integral part of an agile team that's constantly pushing the envelope to enhance, build, and deliver top-notch technology products. As a Senior Lead Software Engineer at JPMorgan Chase within the Equities - Prime Financial Service, you are an integral part of Core Engineering and Architecture group … of diversity, equity, inclusion, and respect. Required qualifications, capabilities, and skills Formal training or certification on software engineering concepts and proficient advanced experience in Java Hands-on experience in system design, application development, testing, and ensuring operational stability. Proficiency in Java and cloud technologies including AWS services. Advanced More ❯

s money. For everyone, everywhere. More about our mission and what we offer . Job Description About the role We are looking for a Senior SRE Engineer to focus on Reliability Excellence at Wise. You will work cross functionally with all engineering teams in Wise to ensure we … consistently deliver on our availability and performance SLOs. A product engineer background looking to have a big impact, you will need strong collaboration skills, an ability to jump into projects and influence how teams approach reliability. Our SRE team is responsible for effective Incident management, Capacity management and Availability. … growth by continuously iterating on the services we run, with a focus on availability, security, and ease of use. We’re looking for an engineer with relevant experience who can analyse complex requirements and deliver simple solutions to help our teams achieve our mission with speed and confidence. What More ❯

output, performance, collaboration patterns, and feedback loops. MUST HAVES - 5+ years of professional software engineering experience; - Proficiency with at least part of our stack: Java, TypeScript + React, and MySQL; - Extensive applied experience with AI-assisted development tooling—whether it’s Cursor, Windsurf, LLM APIs, codegen platforms, vector databases More ❯

verification and security features built-in, and manage their Avios account while enjoying their rewarding benefits. What you’ll get up to As a Senior Back-End Engineer, you'll hold a pivotal position within the product team, contributing to the design and implementation of new features in … and deliver the best possible outcomes. You'll bring hands-on expertise in crafting solutions within your chosen tech stack (e.g., Node.js and Express, Java and Spring Boot), along with a deep understanding of APIs, system architecture, and industry protocols like OAuth 2.0. Your expertise lies in the Back … a proven track record of delivering innovation. What we need from you Crafting software, writing tests, and debugging. Building and maintaining microservice-based applications (Java preferred). Familiarity with databases like PostgreSQL or Redis. Proficient in Linux for production environments. Experience with frameworks like Spring Boot and ORMs like More ❯

Job Description Referment has partnered with a leading cryptocurrency firm focused on blockchain innovation, seeking a Lead Java Software Developer to join their team and help build secure, scalable software solutions within the digital finance space. Role Overview The Lead Java Software Developer will lead the design and … development of Java-based applications, contributing to the creation of decentralized finance (DeFi) solutions and blockchain-based systems. Key Responsibilities Develop secure, scalable Java applications. Collaborate with cross-functional teams to deliver innovative solutions. Implement blockchain protocols for DeFi systems. Conduct code reviews and mentor junior developers. Stay … updated on blockchain trends and Java best practices. Qualifications & Skills SET degree from a top UK university. 5+ years of Java development experience, especially in backend and microservices. Experience with cryptocurrency and blockchain is a plus. Proficiency with Java frameworks (e.g., Spring, Hibernate) and databases (e.g., MySQL More ❯