76 to 91 of 91 Senior Java Engineer Jobs in London

Senior Backend Engineer Contractor (Java/Ruby focused) | Fully Remote/EU-Based | Rate £550-650pd, Outside IR35 | 12-months Contract Length Opportunity: We're supporting a fast-moving client at huge global scale, that is in need of a Senior Backend Contractor with deep experience across Java and Ruby . This is a … high-impact freelance role within a tech-driven established team - building scalable systems in a modern backend environment. What You'll Be Doing as a Senior Backend Engineer Contractor (Java/Ruby focused) | Fully Remote/EU-Based | Rate £550-650pd | Outside IR35 : Designing and building robust backend services across Java, Python, and Rust-based … secure coding, and clean architecture decisions Bringing in best practices across multiple programming paradigms and languages Ideally, supporting legacy Ruby codebases or integrations where needed Core Skills for the Senior Backend Engineer Contractor (Java/Ruby focused) | Fully Remote/EU-Based | Rate £550-650pd | Outside IR35 : Senior-level backend experience with both Java More ❯

Senior Backend Engineer Contractor (Java/Ruby focused) | Fully Remote/EU-Based | Rate £550-650pd, Outside IR35 | 12-months Contract Length Opportunity: We're supporting a fast-moving client at huge global scale, that is in need of a Senior Backend Contractor with deep experience across Java and Ruby . This is a … high-impact freelance role within a tech-driven established team - building scalable systems in a modern backend environment. What You'll Be Doing as a Senior Backend Engineer Contractor (Java/Ruby focused) | Fully Remote/EU-Based | Rate £550-650pd | Outside IR35 : Designing and building robust backend services across Java, Python, and Rust-based … secure coding, and clean architecture decisions Bringing in best practices across multiple programming paradigms and languages Ideally, supporting legacy Ruby codebases or integrations where needed Core Skills for the Senior Backend Engineer Contractor (Java/Ruby focused) | Fully Remote/EU-Based | Rate £550-650pd | Outside IR35 : Senior-level backend experience with both Java More ❯

Senior Backend Engineer Contractor (Java/Ruby focused) | Fully Remote/EU-Based | Rate £550-650pd, Outside IR35 | 12-months Contract Length Opportunity: We're supporting a fast-moving client at huge global scale, that is in need of a Senior Backend Contractor with deep experience across Java and Ruby . This is a … high-impact freelance role within a tech-driven established team - building scalable systems in a modern backend environment. What You'll Be Doing as a Senior Backend Engineer Contractor (Java/Ruby focused) | Fully Remote/EU-Based | Rate £550-650pd | Outside IR35 : Designing and building robust backend services across Java, Python, and Rust-based … secure coding, and clean architecture decisions Bringing in best practices across multiple programming paradigms and languages Ideally, supporting legacy Ruby codebases or integrations where needed Core Skills for the Senior Backend Engineer Contractor (Java/Ruby focused) | Fully Remote/EU-Based | Rate £550-650pd | Outside IR35 : Senior-level backend experience with both Java More ❯

Senior Backend Engineer Contractor (Java/Ruby focused) | Fully Remote/EU-Based | Rate £550-650pd, Outside IR35 | 12-months Contract Length Opportunity: We're supporting a fast-moving client at huge global scale, that is in need of a Senior Backend Contractor with deep experience across Java and Ruby . This is a … high-impact freelance role within a tech-driven established team - building scalable systems in a modern backend environment. What You'll Be Doing as a Senior Backend Engineer Contractor (Java/Ruby focused) | Fully Remote/EU-Based | Rate £550-650pd | Outside IR35 : Designing and building robust backend services across Java, Python, and Rust-based … secure coding, and clean architecture decisions Bringing in best practices across multiple programming paradigms and languages Ideally, supporting legacy Ruby codebases or integrations where needed Core Skills for the Senior Backend Engineer Contractor (Java/Ruby focused) | Fully Remote/EU-Based | Rate £550-650pd | Outside IR35 : Senior-level backend experience with both Java More ❯

Senior Backend Engineer Contractor (Java/Ruby focused) | Fully Remote/EU-Based | Rate £550-650pd, Outside IR35 | 12-months Contract Length Opportunity: We're supporting a fast-moving client at huge global scale, that is in need of a Senior Backend Contractor with deep experience across Java and Ruby . This is a … high-impact freelance role within a tech-driven established team - building scalable systems in a modern backend environment. What You'll Be Doing as a Senior Backend Engineer Contractor (Java/Ruby focused) | Fully Remote/EU-Based | Rate £550-650pd | Outside IR35 : Designing and building robust backend services across Java, Python, and Rust-based … secure coding, and clean architecture decisions Bringing in best practices across multiple programming paradigms and languages Ideally, supporting legacy Ruby codebases or integrations where needed Core Skills for the Senior Backend Engineer Contractor (Java/Ruby focused) | Fully Remote/EU-Based | Rate £550-650pd | Outside IR35 : Senior-level backend experience with both Java More ❯

Senior Backend Engineer Contractor (Java/Ruby focused) | Fully Remote/EU-Based | Rate £550-650pd, Outside IR35 | 12-months Contract Length Opportunity: We're supporting a fast-moving client at huge global scale, that is in need of a Senior Backend Contractor with deep experience across Java and Ruby . This is a … high-impact freelance role within a tech-driven established team - building scalable systems in a modern backend environment. What You'll Be Doing as a Senior Backend Engineer Contractor (Java/Ruby focused) | Fully Remote/EU-Based | Rate £550-650pd | Outside IR35 : Designing and building robust backend services across Java, Python, and Rust-based … secure coding, and clean architecture decisions Bringing in best practices across multiple programming paradigms and languages Ideally, supporting legacy Ruby codebases or integrations where needed Core Skills for the Senior Backend Engineer Contractor (Java/Ruby focused) | Fully Remote/EU-Based | Rate £550-650pd | Outside IR35 : Senior-level backend experience with both Java More ❯

Senior Backend Engineer Contractor (Java/Ruby focused) | Fully Remote/EU-Based | Rate £550-650pd, Outside IR35 | 12-months Contract Length Opportunity: We're supporting a fast-moving client at huge global scale, that is in need of a Senior Backend Contractor with deep experience across Java and Ruby . This is a … high-impact freelance role within a tech-driven established team - building scalable systems in a modern backend environment. What You'll Be Doing as a Senior Backend Engineer Contractor (Java/Ruby focused) | Fully Remote/EU-Based | Rate £550-650pd | Outside IR35 : Designing and building robust backend services across Java, Python, and Rust-based … secure coding, and clean architecture decisions Bringing in best practices across multiple programming paradigms and languages Ideally, supporting legacy Ruby codebases or integrations where needed Core Skills for the Senior Backend Engineer Contractor (Java/Ruby focused) | Fully Remote/EU-Based | Rate £550-650pd | Outside IR35 : Senior-level backend experience with both Java 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 … like 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 … 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 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 … like 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 … 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 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 … like 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 … 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 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 … like 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 … 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 More ❯

Job Description: Job Title Senior Java/Fullstack Engineer Location London Corporate Title Vice President We are seeking a Senior Java/Fullstack engineer to join our team in Credit Risk Technology. You will be responsible for critical, globally used platforms within Deutsche Bank. You with be very proficient in Java (v17+ ) services … design and development, deploying with cloud native technologies such as OpenShift, Kubernetes. In additional to Java, working experience with web front ends, and RDBMS data engineering is advantageous – Angular and Oracle for example. You will provide a leading example to other engineers in delivering applications efficiently and safely, using DevOps and automated QA principles. We value independence, innovative approaches … members to foster a culture of excellence Working with architects, business stakeholders, and other technology teams to deliver solutions effectively Your skills and experience Hands-on development experience, with Java 17+, Spring Framework, RESTful Services, JDBC, using Maven/Gradle Enterprise integration patterns via services, messaging, scheduling Web/JS technologies such as Angular, Typsecript, npm Performance analysis and More ❯

As Senior Java Engineer (Fintech project) Job Description WHAT YOU’LL DO Design and implement core backend services for high-performance, complex distributed systems. Utilize modern development practices such as TDD/BDD. Own service design and APIs for internal and external integrations. Write clear, modern, well-tested code. Collaborate across teams in a product-driven environment. … for team use. WHAT WE EXPECT FROM YOU Deep understanding of backend architecture, API design, and scaling. Experience with gRPC or API-first design is a plus. Proficiency in Java and distributed systems, including handling concurrency, retries, and consistency. Strong skills with Postgres, including data modeling and query optimization. Motivated self-starter valuing autonomy. Excellent communication skills and ability More ❯

at our fuel stations and online. We also support wallet behaviours, repeat payments, refunds and identity checks. They are built around an event sourcing architecture using various technologies including Java, Akka, Cassandra, Postgres and Kafka. We embrace DevSecOps wherever possible. Automation is a key area of focus for us. Our scale and workloads demand that we continuously improve our … community. Mentoring and developing others around you. Producing proof of concepts to evaluate new tools. You will need Experience relevant for this job: 5+ years of experience as a Java backend developer with the eagerness to take on new technologies Experience with cloud platform(s) (e.g. AWS, Azure, etc.) Experience with both SQL/NoSQL databases Experience with Ecommerce More ❯

Senior Java Engineer - Take Ownership of Flagship Trading Product - Up to £120k, London Client: Saragossa Location: London, United Kingdom Job Category: Other EU work permit required: Yes Job Views: 1 Posted: 23.05.2025 Expiry Date: 07.07.2025 Job Description: Are you a seasoned engineer looking to lead the development of a flagship trading product? You will join a … a pivotal time, with plans to scale. This product is already used by many tier-1 players in the institutional trading world to address complex execution challenges. As a Senior Engineer, your responsibilities include developing new features, collaborating with engineers and product leads to build sophisticated, event-driven architecture. Strong knowledge of Java, real-time, distributed systems 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 over the next few years. Although relatively new on the … scene, this product 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 role with infrequent travel to a London-based hub, you will have a lot of autonomy whilst More ❯