501 to 525 of 3,596 Java Jobs in London

Lead Backend Software Engineer/Developer (Java Kafka SpringBoot) London/WFH to £120k Are you a skilled Backend Software Engineer with strong Java and real-time messaging experience combined with SC Clearance? You could be progressing your career in a senior, hands-on Lead Backend Software Engineer position at a scale-up technology company with a successful workforce management … can work from home most of the time, meeting up with colleagues in the London office once a week. About you: You have significant experience as a backend focussed Java software engineering with leadership responsibilities You have strong Spring Boot, Kafka and event driven microservices experience with high throughput You have leadership, mentoring and coaching skills You have a strong … one day a week in London office Pension, Healthcare Impactful role with excellent career progression Apply now to find out more about this Lead Backend Software Engineer/Developer (Java Kafka SpringBoot) opportunity. At Client Server we believe in a diverse workplace that allows people to play to their strengths and continually learn. We're an equal opportunities employer whose More ❯

Social network you want to login/join with: Software Engineer III - Java and Observability, London col-narrow-left Client: Location: London, United Kingdom Job Category: Other - EU work permit required: Yes col-narrow-right Job Reference: a76e67a0cb90 Job Views: 4 Posted: 25.06.2025 Expiry Date: 09.08.2025 col-wide Job Description: Join a dynamic team where we prioritize efficient, high-quality … with Product Owner and Customers to elicit system requirements - Design, architect, estimate and implement software deliverables - Automate unit, integration and acceptance testing Required qualifications, capabilities, and skills : - Proficient in Java 11+/Spring Boot ecosystem, including automated unit/integration testing - Respect for clean coding, best practices and Scrum Preferred qualifications, capabilities, and skills : - Practical Experience with React JS, including … automated unit/integration testing will be a plus - Knowledge of UX Design - Experience with Terraform and AWS - Experience with UI testing frameworks (. Cypress) - Java certifications #J-18808-Ljbffr More ❯

Social network you want to login/join with: Lead Backend Software Engineer Java Kafka, London col-narrow-left Client: Client Server Location: London, United Kingdom Job Category: Other - EU work permit required: Yes col-narrow-right Job Reference: 5bae6409b134 Job Views: 4 Posted: 29.06.2025 Expiry Date: 13.08.2025 col-wide Job Description: Lead Backend Software Engineer/Developer (Java Kafka … SpringBoot) London/WFH to £120k Are you a skilled Backend Software Engineer with strong Java and real-time messaging experience combined with SC Clearance? You could be progressing your career in a senior, hands-on Lead Backend Software Engineer position at a scale-up technology company with a successful workforce management solution used within the government, defence and other … can work from home most of the time, meeting up with colleagues in the London office once a week. About you: You have significant experience as a backend focussed Java software engineering with leadership responsibilities You have strong Spring Boot, Kafka and event driven microservices experience with high throughput You have leadership, mentoring and coaching skills You have a strong More ❯

looking to find a hands-on Site Reliability Engineer to join their mission-critical engineering team. The Role: Our client is building a next-generation digital assets platform using Java Spring microservices on Azure, and they need a systems-focused engineer to own reliability, scalability, and observability at the core of their infrastructure. What You’ll Get A superb opportunity … SRE: SLAs, SLOs, SLIs, error budgets, and incident tooling are at the centre of the role. Own and evolve observability frameworks, define resilience strategies, and contribute directly to the Java backend codebase. Join a team shaping institutional crypto infrastructure, with full cloud-native architecture (AKS, Application Insights, Terraform). You’ll be the bridge between software engineering and operations, directly … influencing architectural decisions. What You’ll Bring 8+ years in production engineering or SRE roles. Deep Java/Spring experience. Expertise in monitoring, alerting, and incident tooling (Prometheus, Grafana, OpenTelemetry, ELK, etc.). Experience with Azure, Kubernetes, and scalable systems in high-uptime environments (fintech/crypto preferred). If you're a seasoned engineer who loves clean code, deep More ❯

looking to find a hands-on Site Reliability Engineer to join their mission-critical engineering team. The Role: Our client is building a next-generation digital assets platform using Java Spring microservices on Azure, and they need a systems-focused engineer to own reliability, scalability, and observability at the core of their infrastructure. What You’ll Get A superb opportunity … SRE: SLAs, SLOs, SLIs, error budgets, and incident tooling are at the centre of the role. Own and evolve observability frameworks, define resilience strategies, and contribute directly to the Java backend codebase. Join a team shaping institutional crypto infrastructure, with full cloud-native architecture (AKS, Application Insights, Terraform). You’ll be the bridge between software engineering and operations, directly … influencing architectural decisions. What You’ll Bring 8+ years in production engineering or SRE roles. Deep Java/Spring experience. Expertise in monitoring, alerting, and incident tooling (Prometheus, Grafana, OpenTelemetry, ELK, etc.). Experience with Azure, Kubernetes, and scalable systems in high-uptime environments (fintech/crypto preferred). If you're a seasoned engineer who loves clean code, deep More ❯

Automation Tester - Backend Focus (Java/Cucumber) - SC Cleared - Inside IR35 Direct message the job poster from SR2 | Socially Responsible Recruitment | Certified B Corporation Working with Central Government for a Better Britain | Women Rock Ambassador Test Engineer/Automation Tester Back End Focus (Java/Cucumber) Initially till September 2026 - project likely to run for 2 years 500 - 550 inside … IR35 p/d We are seeking a highly capable Test Engineer/Automation Tester with a strong back-end focus and expertise in Java, Cucumber, and BDD frameworks. The successful candidate will support the delivery of secure, scalable digital services for UK government clients, contributing to quality assurance from within a multidisciplinary agile team. This role focuses on testing … also contributing to CI/CD and automation best practices in a GDS-aligned delivery environment. Key Responsibilities Back-End Test Automation Development: Develop and maintain automated tests using Java , Cucumber , and BDD frameworks, focused on validating APIs, data flows, and service integrations. Test Planning & Strategy: Contribute to test strategy design and produce structured test plans for back-end testing More ❯

We are seeking mid-level Java Developers looking to enter banking. Candidates should be resilient to a slower cadence that comes with working in a highly regulated environment. Essential functions In this role, you will: Build and maintain Java applications in banking and trading that require high performance. Develop testing and benchmarking code. Use systematic approaches to identify and eliminate … performance. Demonstrate and quantify improvements with recorded evidence. Work within existing high-performance systems, frameworks, and infrastructure. Qualifications The ideal candidate has: 1-5 years of commercial experience with Java and Spring. Desirable additional skills: Frontend experience (React) Kotlin, AWS, Azure, Docker We offer Opportunity to work on cutting-edge projects Collaborate with a motivated and dedicated team Benefits package More ❯

Role Title: Java FullStack Developer Duration: contract to run until 31/12/2025 Location: Northampton, hybrid working Rate: up to £276 p/d Umbrella inside IR35 Role purpose/summary You will ensure that all activities and duties are carried out in full compliance with regulatory requirements, Enterprise Wide Risk Management Framework and internal Policies and Policy … and others development needs and seek opportunities to address these needs through guidance, coaching and formal training. Key Skills/requirements What we're looking for: Good hands on Java/J2EE and Springboot experience Experience working with RESTful Some experience with JavaScript Exposure to Cloud Tools Good understanding of Object Oriented Concepts and Design Patterns Skills that will help More ❯

Join to apply for the Senior Java Lead, SVP role at Citi 2 days ago Be among the first 25 applicants Join to apply for the Senior Java Lead, SVP role at Citi At Citi, we believe in power of engineering to drive success and nurture culture where innovation, collaboration and professional growth thrive. Oasys Financial is a sub-ledger … all asset classes. This system handles millions of trades daily and conduct all sub-ledger activities, which is critical for the bank. We are seeking a highly experienced Senior Java Lead Developer to modernize our core financial accounting systems. You will play a critical role in rewriting our legacy sub-ledger application to a modern Java-based architecture. This involves … analyzing existing code, designing equivalent Java components, and ensuring a seamless transition while maintaining system functionality and performance. This role is based at London office interfacing with global technology & business aligned teams. Responsibilities: Develop application methodologies and standards for program analysis, design, coding, testing, debugging, and implementation Analyze existing modules and shell scripts to design equivalent Java components Develop and 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 … the project is to migrate 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 Provide 3rd level support as and … all design discussions and contribute to its development Engage directly with people across the organisation, from technology infrastructure through to front office Requirements Strong working knowledge and experience with Java Demonstrable experience with Spring, ideally Spring Boot 3 Understanding of DB: MSSQL and Calypso Experience with Kafka and working on a system at scale Understanding of MicroService/Container with 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 … the project is to migrate 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 Provide 3rd level support as and … all design discussions and contribute to its development Engage directly with people across the organisation, from technology infrastructure through to front office Requirements Strong working knowledge and experience with Java Demonstrable experience with Spring, ideally Spring Boot 3 Understanding of DB: MSSQL and Calypso Experience with Kafka and working on a system at scale Understanding of MicroService/Container with More ❯

Social network you want to login/join with: Lead Software Engineer - Golang/Java/React/Typescript, London Location: London, United Kingdom Job Category: Other EU work permit required: Yes Job Reference: e18780fb4361 Job Views: 21 Posted: 22.06.2025 Expiry Date: 06.08.2025 Job Description: This is your chance to change the path of your career and guide multiple teams … equity, inclusion, and respect, prioritizing diverse representation. Required qualifications, capabilities, and skills Formal training or certification in software engineering concepts and advanced experience. Hands-on experience with Golang/Java or React/Typescript. Experience leading technology projects. Proficiency in automation and continuous delivery methods. Knowledge of all aspects of the Software Development Life Cycle. Advanced understanding of agile methodologies More ❯

capabilities. Mentor junior team members and ensure they adhere to determined software quality standards and engage in code reviews. Participate in incident awareness and support handling. Strong knowledge of Java (core and framework), Spring Framework (MVC/Batch), Spring MVC, Spring Boot, Tomcat, Hibernate, Git, BitBucket, and Jenkins. Deep hands-on expertise with SOA, Microservices, REST/SOAP Web Services 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 … to ensure real-time decision-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: Strong understanding of FIC markets Experience with 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 … to ensure real-time decision-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: Strong understanding of FIC markets Experience with More ❯

your skills. Its offers are organized around 3 main expertise: IT Support, Rapid Application Development, and Software Development. Margo is seeking a Front Office Developer (C++ or C# or Java or Python) to integrate its teams within a worldwide corporate and investment bank. Key Responsibilities Creation/development of new trading platforms Implementation of new products, trading machines/algorithms … Risk and PnL Credit and rates Exchange-traded funds Convertible bonds Skills Required Deep understanding of object-oriented programming concepts and principles Strong skills in C++ or C# or Java or Python development (depending on the team/project) with good knowledge of their ecosystem Knowledge of SQL and Linux (including development, debugging, scripting, and networking) Problem-solving mindset with More ❯

A leading corporate banking and capital markets organisation is seeking a Java Developer to join their team in London. Company Description: Commerzbank is a leading international commercial bank with branches and offices in almost 50 countries. The world is changing, becoming digital, and so are we. We are leaving the traditional bank behind us and we are choosing to move … bespoke pricing platforms that interface with the C++ quant pricing libraries as well as the distribution of market data to back office systems and internal/external clients. Summary Java development role (Java 21+). The business is ever-changing and demands an agile culture, fast-paced front office environment. The role is responsible for helping to build and support … through new projects and ongoing business requirements. Hybrid work model with opportunities to work from home or the office. Teams are based in London and Sofia. Key Skills for Java Developer: Excellent Java experience – Essential. Background in a numerate degree – Essential. Interest rates experience – Desirable but not necessary. Keen learner, interest in learning more about the business. Someone who is More ❯

A leading corporate banking and capital markets organisation is seeking a Java Developer to join their team in London. Company Description: Commerzbank is a leading international commercial bank with branches and offices in almost 50 countries. The world is changing, becoming digital, and so are we. We are leaving the traditional bank behind us and we are choosing to move … bespoke pricing platforms that interface with the C++ quant pricing libraries as well as the distribution of market data to back office systems and internal/external clients. Summary Java development role (Java 21+). The business is ever-changing and demands an agile culture, fast-paced front office environment. The role is responsible for helping to build and support … through new projects and ongoing business requirements. Hybrid work model with opportunities to work from home or the office. Teams are based in London and Sofia. Key Skills for Java Developer: Excellent Java experience – Essential. Background in a numerate degree – Essential. Interest rates experience – Desirable but not necessary. Keen learner, interest in learning more about the business. Someone who is More ❯

recruiter to learn more. Base pay range Direct message the job poster from Client Server Tech Recruiter - Software Engineering at Client-Server Lead Backend Developer/Software Engineer (Python Java AWS) London/WFH to £115k Are you a backend-focused software developer with leadership skills? You could be progressing your career at a scale-up tech company (established … two days remote. When in the office, you can enjoy onsite gym, barista coffee, and free breakfast. About you: You're an experienced, backend-focused software developer with Python, Java, and good knowledge of AWS. You're product-focused with good business acumen. You have a solid understanding of software architecture patterns, database optimisation, infrastructure, scalability, and deployment. You have … with Octopus Electric Vehicles, Evans Cycle to Work scheme, showers, and towels for cycling enthusiasts Apply now to learn more about this Lead Backend Developer/Software Engineer (Python Java AWS) role. At Client Server, we believe in a diverse workplace that allows people to play to their strengths and continually learn. We're an equal opportunities employer, welcoming applicants More ❯

Senior Site Reliability Engineer - Java Focussed Senior Site Reliability Engineer - Java Focussed 2 days ago Be among the first 25 applicants Tempest Vane Partners provided pay range This range is provided by Tempest Vane Partners. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more. Base pay range Direct message the job … looking to find a hands-on Site Reliability Engineer to join their mission-critical engineering team. The Role: Our client is building a next-generation digital assets platform using Java Spring microservices on Azure, and they need a systems-focused engineer to own reliability, scalability, and observability at the core of their infrastructure. What You’ll Get A superb opportunity … SRE: SLAs, SLOs, SLIs, error budgets, and incident tooling are at the centre of the role. Own and evolve observability frameworks, define resilience strategies, and contribute directly to the Java backend codebase. Join a team shaping institutional crypto infrastructure, with full cloud-native architecture (AKS, Application Insights, Terraform). You’ll be the bridge between software engineering and operations, directly More ❯

Job Description: Job Title Senior Quantitative Software Engineer – Java – Intraday Risk Location London Corporate Title Vice President Group Strategic Analytics is part of Group Chief Operation Office (COO) which acts as the bridge between the Bank’s businesses and infrastructure functions to help deliver the efficiency, control, and transformation goals of the Bank. You will join the Debt Strats team … traders globally and provides ticking and event-driven intraday risk and P&L for Rates, Credit and Emerging Markets trading desks. The delivery team consists of quantitative business analysts, Java quantitative software engineers, C# engineers, platform engineers and testers, and uses JIRA to track and manage deliveries. Server-side development is done in Java utilising Oracle Coherence in a low … throughput, multi-threaded and highly distributed system. The platform runs on clusters of physical Redhat Linux servers, and utilises Oracle Coherence, Spring Framework, Hibernate, Oracle Exadata and Solace and Java Message Service (JMS) messaging. You will be responsible for developing risk and P&L functionality in Java, including analysing, designing, coding, and supporting functionality across trade sourcing, market data loading More ❯

Senior Java Engineer – Kafka & Spring Boot About the Client We’re working with an innovative team building the next generation of secure, real-time communication and data platforms. Their flagship product is a fresh reimagining of an existing system, crafted to provide robust, distributed coordination for a wide range of uses – from emergency response and humanitarian logistics to private collaboration … a change of scene, but in-person attendance is only occasionally required for team meetups or workshops – always with advance notice. The Role We’re looking for a Senior Java Engineer who thrives in the world of Kafka and Spring Boot. You’ll play a key role in crafting a secure, distributed backend system designed for real-time operations and … and frontend specialists to create reliable backend services that keep people and teams connected when it matters most. Your Day-to-Day Architect and build event-driven microservices using Java, Spring Boot, and Kafka Be responsible for the backend engineering for secure, distributed real-time systems Design and deliver rock-solid APIs in collaboration with frontend and AI colleagues Seamlessly More ❯

Senior Java Engineer – Kafka & Spring Boot About the Client We’re working with an innovative team building the next generation of secure, real-time communication and data platforms. Their flagship product is a fresh reimagining of an existing system, crafted to provide robust, distributed coordination for a wide range of uses – from emergency response and humanitarian logistics to private collaboration … a change of scene, but in-person attendance is only occasionally required for team meetups or workshops – always with advance notice. The Role We’re looking for a Senior Java Engineer who thrives in the world of Kafka and Spring Boot. You’ll play a key role in crafting a secure, distributed backend system designed for real-time operations and … and frontend specialists to create reliable backend services that keep people and teams connected when it matters most. Your Day-to-Day 🛠️ Architect and build event-driven microservices using Java, Spring Boot, and Kafka Be responsible for the backend engineering for secure, distributed real-time systems Design and deliver rock-solid APIs in collaboration with frontend and AI colleagues Seamlessly More ❯

Senior Java Engineer – Kafka & Spring Boot About the Client We’re working with an innovative team building the next generation of secure, real-time communication and data platforms. Their flagship product is a fresh reimagining of an existing system, crafted to provide robust, distributed coordination for a wide range of uses – from emergency response and humanitarian logistics to private collaboration … a change of scene, but in-person attendance is only occasionally required for team meetups or workshops – always with advance notice. The Role We’re looking for a Senior Java Engineer who thrives in the world of Kafka and Spring Boot. You’ll play a key role in crafting a secure, distributed backend system designed for real-time operations and … and frontend specialists to create reliable backend services that keep people and teams connected when it matters most. Your Day-to-Day 🛠️ Architect and build event-driven microservices using Java, Spring Boot, and Kafka Be responsible for the backend engineering for secure, distributed real-time systems Design and deliver rock-solid APIs in collaboration with frontend and AI colleagues Seamlessly More ❯

Senior Java Engineer – Kafka & Spring Boot About the Client We’re working with an innovative team building the next generation of secure, real-time communication and data platforms. Their flagship product is a fresh reimagining of an existing system, crafted to provide robust, distributed coordination for a wide range of uses – from emergency response and humanitarian logistics to private collaboration … a change of scene, but in-person attendance is only occasionally required for team meetups or workshops – always with advance notice. The Role We’re looking for a Senior Java Engineer who thrives in the world of Kafka and Spring Boot. You’ll play a key role in crafting a secure, distributed backend system designed for real-time operations and … and frontend specialists to create reliable backend services that keep people and teams connected when it matters most. Your Day-to-Day 🛠️ Architect and build event-driven microservices using Java, Spring Boot, and Kafka Be responsible for the backend engineering for secure, distributed real-time systems Design and deliver rock-solid APIs in collaboration with frontend and AI colleagues Seamlessly More ❯