1 to 25 of 35 Permanent Senior Java Engineer Jobs in the South East

Senior Java Engineer (Kafka, Spring Boot, Microservices) We're hiring a Senior Java Engineer to build secure, real-time systems using Java, Spring Boot, and Apache Kafka. You'll design scalable event-driven microservices, collaborate across the stack, and shape a platform used … mission-critical environments. If you're a hands-on backend engineer passionate about distributed systems, resilience, security and clean architecture — this is your next challenge. Location & Flexibility Work remotely from anywhere in the UK, with the option to use a London office when you prefer in-person time. Team ...

Senior Java Engineer | hybrid (2 days in office) | Up to £85k Want to work for a global technology company that helps businesses easily connect, manage, and scale their devices using secure and reliable mobile connectivity worldwide. We’re looking for a Senior Software Engineer … properly , using sound engineering theory and modern architectural patterns. What You’ll Be Doing Designing and building scalable, event-driven systems Working heavily with Java , applying strong OOP principles and design patterns Contributing to software and system architecture decisions Challenging ideas constructively and raising engineering standards Supporting the team ...

Senior Java Engineer (Kubernetes, Kafka, Cloud) – Finance – London Daily rate: £500 - £700 (inside IR35) Duration: 12 months Hybrid: 8 days per month Start: ASAP A banking client of mine is looking for a Senior Java Engineer with Kafka and Docker skills to join … team on a freelance basis. We are specifically looking for an individual with strong Core Java expertise, as this role primarily involves server-side development. Must be based in the UK and happy to be on site 8 days per month which is mandatory. Responsibilities & Duties Working as part ...

Senior Java Engineer – Actuarial Data Squad – Outside IR35 - Contract We're looking for a Senior Java Engineer to join a high-profile project focused on backend systems that automate complex financial and actuarial processes. This is a hands-on role delivering backend solutions under … tight deadlines in a highly regulated environment. Key Responsibilities: Develop backend systems and APIs in Java, using the Spring ecosystem Work with AWS and infrastructure-as-code tools such as Terraform or Helm Design and implement scalable, production-ready systems for complex financial processes Collaborate with business and technical ...

Senior Java Engineer – Actuarial Data Squad – Outside IR35 - Contract We're looking for a Senior Java Engineer to join a high-profile project focused on backend systems that automate complex financial and actuarial processes. This is a hands-on role delivering backend solutions under … tight deadlines in a highly regulated environment. Key Responsibilities: Develop backend systems and APIs in Java, using the Spring ecosystem Work with AWS and infrastructure-as-code tools such as Terraform or Helm Design and implement scalable, production-ready systems for complex financial processes Collaborate with business and technical ...

Senior Java Engineer – Actuarial Data Squad – Outside IR35 - Contract We're looking for a Senior Java Engineer to join a high-profile project focused on backend systems that automate complex financial and actuarial processes. This is a hands-on role delivering backend solutions under … tight deadlines in a highly regulated environment. Key Responsibilities: Develop backend systems and APIs in Java, using the Spring ecosystem Work with AWS and infrastructure-as-code tools such as Terraform or Helm Design and implement scalable, production-ready systems for complex financial processes Collaborate with business and technical ...

Senior Java Engineer – Actuarial Data Squad – Outside IR35 - Contract We're looking for a Senior Java Engineer to join a high-profile project focused on backend systems that automate complex financial and actuarial processes. This is a hands-on role delivering backend solutions under … tight deadlines in a highly regulated environment. Key Responsibilities: Develop backend systems and APIs in Java, using the Spring ecosystem Work with AWS and infrastructure-as-code tools such as Terraform or Helm Design and implement scalable, production-ready systems for complex financial processes Collaborate with business and technical ...

Senior Java Engineer – Actuarial Data Squad – Outside IR35 - Contract We're looking for a Senior Java Engineer to join a high-profile project focused on backend systems that automate complex financial and actuarial processes. This is a hands-on role delivering backend solutions under … tight deadlines in a highly regulated environment. Key Responsibilities: Develop backend systems and APIs in Java, using the Spring ecosystem Work with AWS and infrastructure-as-code tools such as Terraform or Helm Design and implement scalable, production-ready systems for complex financial processes Collaborate with business and technical ...

Senior Java Engineer – Actuarial Data Squad – Outside IR35 - Contract We're looking for a Senior Java Engineer to join a high-profile project focused on backend systems that automate complex financial and actuarial processes. This is a hands-on role delivering backend solutions under … tight deadlines in a highly regulated environment. Key Responsibilities: Develop backend systems and APIs in Java, using the Spring ecosystem Work with AWS and infrastructure-as-code tools such as Terraform or Helm Design and implement scalable, production-ready systems for complex financial processes Collaborate with business and technical ...

Senior Java Engineer – Actuarial Data Squad – Outside IR35 - Contract We're looking for a Senior Java Engineer to join a high-profile project focused on backend systems that automate complex financial and actuarial processes. This is a hands-on role delivering backend solutions under … tight deadlines in a highly regulated environment. Key Responsibilities: Develop backend systems and APIs in Java, using the Spring ecosystem Work with AWS and infrastructure-as-code tools such as Terraform or Helm Design and implement scalable, production-ready systems for complex financial processes Collaborate with business and technical ...

Senior Java Engineer – Actuarial Data Squad – Outside IR35 - Contract We're looking for a Senior Java Engineer to join a high-profile project focused on backend systems that automate complex financial and actuarial processes. This is a hands-on role delivering backend solutions under … tight deadlines in a highly regulated environment. Key Responsibilities: Develop backend systems and APIs in Java, using the Spring ecosystem Work with AWS and infrastructure-as-code tools such as Terraform or Helm Design and implement scalable, production-ready systems for complex financial processes Collaborate with business and technical ...

Role: Senior Java Engineer Location: Osterley, UK Contract role - Inside Ir35 Hybrid work: Min 4 days from client location Experience: 10+ Start date: Immediate Key Responsibilities: Highly skilled Senior Java Developer with hands-on experience in Spring Boot, WebFlux, and Reactive Programming. Experience in optimizing … Mentor junior engineers and contribute to technical leadership across the team. Required Skills & Experience: 10+ years of professional software development experience. Strong proficiency in Java, spring boot Solid understanding of Docker Compose, Kubernetes, and Amazon EC2. Expertise in at least one major cloud platform (AWS, GCP, or Azure). ...

Senior Java Backend Engineer Location: Hybrid – London Job Type: Permanent | Full-Time Salary: £80,000 – £95,000 + Benefits We're supporting a fast-scaling UK digital banking platform as they continue strengthening the systems that power millions of daily transactions. They're now looking … Senior Backend Engineer with strong Java engineering experience and a passion for building reliable, distributed systems at scale. This role is ideal for someone who enjoys working on event-driven, distributed architectures, values thoughtful system design, and wants to deliver high-impact backend work at scale. ...

Senior Java Developer – London (Hybrid: 2 Days Onsite) We're partnering with a leading global organisation that is scaling its engineering function and looking for a Senior Java Developer to join their London team. If you're passionate about building data-driven platforms, enjoy solving complex … want to work with modern cloud-native technologies, this is the role for you. What You'll Be Doing Designing, developing, and maintaining scalable Java applications using strong OOP principles. Playing an active role in requirements gathering and design workshops, contributing ideas and identifying gaps. Mentoring and pairing with ...

Currently hiring a Senior Java Engineer to join a fixed income trading team - a high-performing group responsible for building and maintaining global trading systems used daily by traders and middle office teams. These systems handle complex financial instruments, from bonds and repos to interest rate swaps … exotic portfolios, with a strong focus on performance, reliability, and traceability. Key Responsibilities: Design, develop, test, and deploy high-quality software using Java and related technologies Conduct code reviews, ensuring clean, maintainable, and efficient code Mentor junior developers and promote technical excellence within the team Analyse and resolve performance ...

Senior Software Engineer (Java) – Portfolio Optimization | Fintech | London/Hybrid About My Client My client is a high-growth fintech company transforming the way capital markets operate. Their mission is to make global financial systems safer, more efficient, and more open, using advanced technology and deep domain … develop intelligent solutions that optimise portfolios, reduce risk, and unlock access to more diversified capital. About the Role My client is seeking a Senior Software Engineer to join their Portfolio Optimization team — a core group responsible for building the technology that drives their balance-sheet and exposure-management ...

/2x per month) to either London, Manchester, Newcastle, or Glasgow. You will be able to pick a location nearest to you. As a Senior Java Full Stack Engineer, you'll work on complex, high-visibility projects—building modern, scalable digital products that drive real business change. … collaborate closely with multidisciplinary teams and gain exposure to a wide variety of technologies, including Java, Spring Boot, Kotlin, Node.js, React, microservices, Docker, CI/CD pipelines, and cloud platforms (AWS/Azure). What We're Looking For Required 5 years commercial software engineering experience Strong experience building ...

/2x per month) to either London, Manchester, Newcastle, or Glasgow. You will be able to pick a location nearest to you. As a Senior Java Full Stack Engineer, you'll work on complex, high-visibility projects—building modern, scalable digital products that drive real business change. … collaborate closely with multidisciplinary teams and gain exposure to a wide variety of technologies, including Java, Spring Boot, Kotlin, Node.js, React, microservices, Docker, CI/CD pipelines, and cloud platforms (AWS/Azure). What We're Looking For Required 5 years commercial software engineering experience Strong experience building ...

/2x per month) to either London, Manchester, Newcastle, or Glasgow. You will be able to pick a location nearest to you. As a Senior Java Full Stack Engineer, you'll work on complex, high-visibility projects—building modern, scalable digital products that drive real business change. … collaborate closely with multidisciplinary teams and gain exposure to a wide variety of technologies, including Java, Spring Boot, Kotlin, Node.js, React, microservices, Docker, CI/CD pipelines, and cloud platforms (AWS/Azure). What We're Looking For Required 5 years commercial software engineering experience Strong experience building ...

/2x per month) to either London, Manchester, Newcastle, or Glasgow. You will be able to pick a location nearest to you. As a Senior Java Full Stack Engineer, you'll work on complex, high-visibility projects—building modern, scalable digital products that drive real business change. … collaborate closely with multidisciplinary teams and gain exposure to a wide variety of technologies, including Java, Spring Boot, Kotlin, Node.js, React, microservices, Docker, CI/CD pipelines, and cloud platforms (AWS/Azure). What We're Looking For Required 5 years commercial software engineering experience Strong experience building ...

/2x per month) to either London, Manchester, Newcastle, or Glasgow. You will be able to pick a location nearest to you. As a Senior Java Full Stack Engineer, you'll work on complex, high-visibility projects—building modern, scalable digital products that drive real business change. … collaborate closely with multidisciplinary teams and gain exposure to a wide variety of technologies, including Java, Spring Boot, Kotlin, Node.js, React, microservices, Docker, CI/CD pipelines, and cloud platforms (AWS/Azure). What We're Looking For Required 5 years commercial software engineering experience Strong experience building ...

/2x per month) to either London, Manchester, Newcastle, or Glasgow. You will be able to pick a location nearest to you. As a Senior Java Full Stack Engineer, you'll work on complex, high-visibility projects—building modern, scalable digital products that drive real business change. … collaborate closely with multidisciplinary teams and gain exposure to a wide variety of technologies, including Java, Spring Boot, Kotlin, Node.js, React, microservices, Docker, CI/CD pipelines, and cloud platforms (AWS/Azure). What We're Looking For Required 5 years commercial software engineering experience Strong experience building ...

/2x per month) to either London, Manchester, Newcastle, or Glasgow. You will be able to pick a location nearest to you. As a Senior Java Full Stack Engineer, you'll work on complex, high-visibility projects—building modern, scalable digital products that drive real business change. … collaborate closely with multidisciplinary teams and gain exposure to a wide variety of technologies, including Java, Spring Boot, Kotlin, Node.js, React, microservices, Docker, CI/CD pipelines, and cloud platforms (AWS/Azure). What We're Looking For Required 5 years commercial software engineering experience Strong experience building ...

Hiring: Senior Software Developer Hybrid | Weekly Travel to HO in Northampton or London | Full-Time | From £60k Apply by: 30 September 2025 (or sooner if we find the right person!) Are you a seasoned .NET developer ready to lead enterprise-grade software projects and drive digital transformation … looking for a Senior Software Engineer to join our team and shape the future of our tech landscape. In this role, you'll: Lead the design and development of scalable web applications using ASP.NET Web Forms, .NET Core, and C# Architect backend solutions with SQL Server ...

release management. Respond to real-time trading issues in a fast-paced environment, ensuring minimal business disruption. Key Skills & Experience: Strong expertise in Core Java, Spring Framework/Spring Boot, or similar backend frameworks. Proven experience designing and developing API-based, microservices-driven architectures. Solid understanding of multi-threaded ...