This role requires security clearance, and you will therefore require British citizenship or Dual UK nationality with British citizenship. An exciting opportunity for a SeniorJavaSoftwareEngineer has arisen with a leading defence company, focusing on software development and delivery within the New Product Development team, based in Bristol. … This is a great opportunity for a SeniorJavaSoftwareEngineer to lead the development and delivery of software requirements and design across the full software engineering lifecycle, working with a range of international teams and stakeholders. You will commit to an onsite working model, required onsite … days a week. Experience of the SeniorJavaSoftwareEngineer will include: 3+ years of experience programming with Core Java, developing desktop applications Experience developing and managing software requirements throughout the full lifecycle, ensuring compliance with defined requirements Bonus: JavaFX If you are a SeniorJavaMore ❯
London, England, United Kingdom Hybrid/Remote Options
Client Server
SeniorSoftwareEngineer/Developer (Java AWS) London/WFH to £100k Opportunity to progress your career in a senior, hands-on SoftwareEngineer role at a global FinTech/CFD trading company that has been consistently voted as one of the UKs top employers. As … a SeniorSoftwareEngineer you will join a fairly new team working on a new crypto offering to design, develop and implement high performance cloud-native backend services including owning DevOps processes to ensure systems are robust, secure and observable. You'll be working with a modern tech stack using Java, Spring … Boot, CI/CD, Kubernetes, AWS, EKS and Grafana/Splunk. About you: You have advanced backend software engineering experience with Java, Spring Boot, REST, Postgres, Redis You have experience of running production workloads on Kubernetes (Amazon EKS preferred) You have a good knowledge of DevOps practices including CI/CD, IaC (Terraform) and container orchestration More ❯
East London, London, United Kingdom Hybrid/Remote Options
Client Server
SeniorSoftwareEngineer/Developer (Java AWS) London/WFH to £100k Opportunity to progress your career in a senior, hands-on SoftwareEngineer role at a global FinTech/CFD trading company that has been consistently voted as one of the UKs top employers. As … a SeniorSoftwareEngineer you will join a fairly new team working on a new crypto offering to design, develop and implement high performance cloud-native backend services including owning DevOps processes to ensure systems are robust, secure and observable. You'll be working with a modern tech stack using Java, Spring … Boot, CI/CD, Kubernetes, AWS, EKS and Grafana/Splunk. About you: You have advanced backend software engineering experience with Java, Spring Boot, REST, Postgres, Redis You have experience of running production workloads on Kubernetes (Amazon EKS preferred) You have a good knowledge of DevOps practices including CI/CD, IaC (Terraform) and container orchestration More ❯
SeniorJavaSoftwareEngineer 📍Remote UK | 🌍 Global Fintech | 💳 Merchant-First Payments Ecosystem A high-growth global fintech, renowned for delivering world-class payments-related software and technology, is looking to expand its engineering team. As the company continues to scale its platform to meet growing demand, they’re seeking experienced … who want to solve real-world problems with elegant, modular, and testable code—and who want their work to make a tangible difference. 🚀 About the Role As a SeniorSoftwareEngineer II , you’ll be responsible for designing and developing backend services and portals that power the core payment processing platform. You’ll work … CD. You’ll be trusted with autonomy, empowered to focus on solving technical challenges without unnecessary bureaucracy. Key Responsibilities: Translate merchant and partner needs into scalable, high-performance software solutions. Design and implement clean, testable, and modular systems. Collaborate across small, cross-functional teams to deliver meaningful outcomes. Contribute to continuous improvement of engineering practices and tools. Take More ❯
City of London, London, United Kingdom Hybrid/Remote Options
James Adams
SeniorJavaEngineer London/Hybrid (3 days per week in office) Up to £100,000 + excellent benefits James Adams is working with a fast-growing technology company that’s scaling its engineering function and looking for an experienced SeniorJavaEngineer to join their core platform … someone who wants to work on modern, cloud-native microservices within a high-performing engineering culture that values clean code, collaboration, and innovation. You’ll be working with Java 11+ (preferably Java 21) , Spring , and Kafka , contributing to the design and delivery of resilient distributed systems used at scale. The Role Design and build high-quality … scalable microservices in Java. Apply functional programming principles using Java or Kotlin. Work extensively with Java Streams , ensuring clean, performant code. Integrate and manage Kafka for real-time data streaming. Optimise SQL queries and database performance for reliability and speed. Drive best practices across monitoring, observability, and automation. Collaborate with cross-functional teams to deliver new More ❯
SeniorJavaEngineer London/Hybrid (3 days per week in office) Up to £100,000 + excellent benefits James Adams is working with a fast-growing technology company that’s scaling its engineering function and looking for an experienced SeniorJavaEngineer to join their core platform … someone who wants to work on modern, cloud-native microservices within a high-performing engineering culture that values clean code, collaboration, and innovation. You’ll be working with Java 11+ (preferably Java 21) , Spring , and Kafka , contributing to the design and delivery of resilient distributed systems used at scale. The Role Design and build high-quality … scalable microservices in Java. Apply functional programming principles using Java or Kotlin. Work extensively with Java Streams , ensuring clean, performant code. Integrate and manage Kafka for real-time data streaming. Optimise SQL queries and database performance for reliability and speed. Drive best practices across monitoring, observability, and automation. Collaborate with cross-functional teams to deliver new More ❯
SeniorSoftwareEngineer/Developer (Java AWS) London/WFH to £100k Opportunity to progress your career in a senior, hands-on SoftwareEngineer role at a global FinTech/CFD trading company that has been consistently voted as one of the UKs top employers. As … a SeniorSoftwareEngineer you will join a fairly new team working on a new crypto offering to design, develop and implement high performan click apply for full job details More ❯
SeniorJava Developer- London/Hybrid- up to £95k Our client an innovative and light footed fintech startup/scaleup brand are on a mission to revolutionise the credit and lending space. The brand who have now been running for the last 10 years and backed by VC investment are looking to hire a SeniorEngineer to work on an exciting Product roadmap over the coming years. This role is based out of central London on a hybrid approach and looking for people that are willing to come to their office 3 days per week, they may have a bit of flexibility on this and very flexible hours. Tech Stack: Java 11 (moving to Java 17) Relational Databases- SQL and ORM Tech (JPA, Hibernate) Frameworks- preferably Vaadin or JSF, Wicket, Spring MVC Spring Boot AWS Microservices ML/Big Data- desirable Docker- desirable messaging- GRPC/Solis- desirable Responsibilities: Design and development of low latency software components Contribute across the entire SDLC write and enhance More ❯
SeniorJava Developer- London/Hybrid- up to £95k Our client an innovative and light footed fintech startup/scaleup brand are on a mission to revolutionise the credit and lending space. The brand who have now been running for the last 10 years and backed by VC investment are looking to hire a SeniorEngineer to work on an exciting Product roadmap over the coming years. This role is based out of central London on a hybrid approach and looking for people that are willing to come to their office 3 days per week, they may have a bit of flexibility on this and very flexible hours. Tech Stack: Java 11 (moving to Java 17) Relational Databases- SQL and ORM Tech (JPA, Hibernate) Frameworks- preferably Vaadin or JSF, Wicket, Spring MVC Spring Boot AWS Microservices ML/Big Data- desirable Docker- desirable messaging- GRPC/Solis- desirable Responsibilities: Design and development of low latency software components Contribute across the entire SDLC write and enhance More ❯
South West London, London, United Kingdom Hybrid/Remote Options
Run-Time Group Ltd
Job Title: Mid-SeniorJavaEngineer Location: London (Hybrid - 2-3 days in-office) Salary: Up to £85,000 per annum + Benefits Sector: Financial Services About the Role: We are seeking a Senior-Level JavaEngineer to join a dynamic financial technology team in London. You will … play a key role in developing, maintaining, and enhancing high-performance, scalable financial applications. This is a fantastic opportunity for an ambitious developer with experience in Java and a passion for the financial sector. The role follows a hybrid working model, with 2-3 days per week in the office. Key Responsibilities: Design, develop, and maintain high-quality … Java-based applications for financial services. Collaborate with cross-functional teams to deliver robust and scalable software solutions. Ensure code quality, security, and performance standards are met. Work on both greenfield and existing applications, improving architecture and implementing best practices. Troubleshoot and resolve complex technical issues. Participate in code reviews and provide constructive feedback. Stay updated More ❯
Role Sr SoftwareEngineer - Full Stack (React/Java) Why UKG: At UKG, the work you do matters. The code you ship, the decisions you make, and the care you show a customer all add up to real impact. Today, tens of millions of workers start and end their days with our workforce operating … thats real, benefits you can count on, and a team that succeeds together. Because at UKG, your work matters and so do you. We are looking for a SeniorSoftwareEngineer to join our dynamic team. This role provides an opportunity to lead projects and contribute to high-impact software solutions that … are used by enterprises and users worldwide. As a SeniorSoftwareEngineer, you will be responsible for the design, development, testing, deployment, and maintenance of complex software systems, as well as mentoring junior engineers. You will work in a collaborative environment, contributing to the technical foundation behind our flagship products and services. More ❯
SeniorJava Developer – AWS Cloud Platform Nottingham – Hybrid Full time – permanent We are seeking a SeniorSoftwareEngineer to design, develop, and deploy scalable, secure, and high-performing applications on the AWS Cloud platform. You will play a key role in shaping new features that are both delightful and essential … technical solutions. Own and lead development of team-owned components and features, ensuring maintainability, scalability, and performance. Contribute to the design and implementation of microservices and APIs using Java, Spring Boot, and Spring Cloud. Participate in code reviews, technical discussions, and architecture design sessions to uphold engineering excellence. Ensure robust CI/CD pipelines for AWS deployments and … native application development Designed developed, and deployed cloud-native applications on AWS, leveraging services such as EC2, Lambda, S3, API Gateway, RDS, and CloudFormation Strong programming skills in Java with a deep understanding of modern object-oriented principles (SOLID, SOA, HTTP, REST). Hands-on experience with Spring Boot, Spring Cloud, and microservices architecture. Experience in API design More ❯
SeniorSoftwareEngineer (Java)- Remote (once a month in Oxford) 💰 Up to £65,000 + benefits We’re partnering with a fast-growing SaaS business that was one of the early innovators in bringing cloud-based software to market. Their platform is used by hundreds of thousands of users across … within a scaling organisation. You will mentor a small team of 3 talented developers while remaining hands-on with coding and solution design. You’ll help define how software is built, scale systems, and influence the technical direction of a globally used SaaS product. You’ll be supported by a collaborative leadership team that values technical excellence, autonomy … and personal growth. Key Responsibilities Support, and develop a small team of software engineers. Remain hands-on with coding and peer code reviews. Contribute to and uphold coding standards, architectural principles, and best practices. Collaborate with peers and product leadership to evolve software delivery and scalability. Drive a culture of quality, learning, and innovation within the More ❯
Join Our ScriptRunner Platform Team as a SeniorSoftwareEngineer! Are you passionate about developing innovative solutions that enhance user experiences for millions? Do you have a knack for leading and mentoring teams to success? If so, ScriptRunner is looking for a dynamic SeniorSoftwareEngineer to join … fostering an engineering culture that thrives on innovation and collaboration. What You’ll Do: Help build the platform that powers ScriptRunner Cloud. We’re looking for an experienced engineer who loves solving complex problems at scale, thrives in a DevOps-minded team, and enjoys shipping continuously. You’ll shape the core technology that underpins our ScriptRunner Cloud products … What We’re Looking For: Essential Skills: Proven experience building and operating large-scale systems on AWS. Strong background in high-availability, fault-tolerant, distributed systems. Fluency in Java and Spring Boot. Excellent organisational, prioritisation, and communication skills. Desirable Skills: Hands-on CI/CD experience. Understanding of serverless and microservices architectures with extensible REST APIs. Familiarity with More ❯
SeniorJava Developer - FinTech Start-up (Remote, UK) Salary: £50,000–£80,000 + EMI Stock Options Location: Fully Remote (UK or Europe-based preferred) Company: High-Growth FinTech Start-up Join a Fast-Growing FinTech Revolutionising Payments We’re partnering with a venture-backed FinTech start-up that’s redefining how businesses manage international payments … processes, and outdated broker models - their use of AI is pivotal to their mission and the "how". The business is now looking to hire a hands-on SeniorJava Developer to help scale their platform and shape the next phase of growth. The Opportunity This is a rare chance to join a well-funded, product … mission-driven team where autonomy, innovation, and impact are at the heart of everything they do. What You’ll Do Lead and contribute to hands-on development using Java and Spring Boot . Oversee and collaborate with a distributed engineering team (based in Eastern Europe). Own and evolve the technical architecture across AWS and Kubernetes infrastructure. Build More ❯
Menlo Park, California, United States Hybrid/Remote Options
OSI Engineering
Job Summary: We're looking for a talented SeniorSoftwareEngineer to be a key contributor to developing cloud-based services that will drive the future of the business. You will join our small and dynamic Cloud Services team, using the latest technology and tools to build high-quality, cross-platform solutions that are … robust, scalable, and efficient. You will also collaborate with a versatile cross-functional team to make a significant impact on our product offerings. Responsibilities: SeniorSoftwareEngineer is a technical role, with responsibilities ranging from solving technical problems to creating design documents and implementing complex designs. Directly responsible for consistently delivering scalable, production-ready … back-end/server code in Java, from design and development to deployment, as a member of an Agile development team. Partner closely with a cross-functional team of key stakeholders (Engineers, Architects, Product Managers, QA, and Operations) to design and implement solutions that meet user needs as well as engineering and operations. Display a passion for high More ❯
Job Title: Mid-SeniorJavaEngineer Location: London (Hybrid - 2-3 days in-office) Salary: Up to £85,000 per annum + Benefits Sector: Financial Services About the Role: We are seeking a Senior-Level JavaEngineer to join a dynamic financial technology team in London. You will More ❯
SeniorJava Developer - Java, Springboot & AWS – paying up to £650/day (Inside IR35) – Hybrid (2x a week - London) – 6 month contract Our client is seeking a SeniorJava Developer who is passionate about clean code, cloud-native systems, and building technology that makes a real impact. This is a … unique opportunity to work in an agile, high-ownership engineering culture. What You'll Be Doing: Build and scale backend services using Java and Spring Boot Shape a modern microservices architecture for a high-availability platform Deploy and manage services in AWS with Kubernetes (EKS) Design, implement, and own features end-to-end from discovery to production support … cross-functional teams including product, design, and infrastructure Troubleshoot complex issues and help ensure system reliability and performance What You’ll Bring: Strong backend engineering experience, especially in Java and Spring Deep understanding of distributed systems and microservices Hands-on experience with AWS , Kubernetes , Docker , and Terraform Familiarity with CI/CD pipelines and testing best practices Solid More ❯
SeniorJava Developer - Java, Springboot & AWS – paying up to £650/day (Inside IR35) – Hybrid (2x a week - London) – 6 month contract Our client is seeking a SeniorJava Developer who is passionate about clean code, cloud-native systems, and building technology that makes a real impact. This is a … unique opportunity to work in an agile, high-ownership engineering culture. What You'll Be Doing: Build and scale backend services using Java and Spring Boot Shape a modern microservices architecture for a high-availability platform Deploy and manage services in AWS with Kubernetes (EKS) Design, implement, and own features end-to-end from discovery to production support … cross-functional teams including product, design, and infrastructure Troubleshoot complex issues and help ensure system reliability and performance What You’ll Bring: Strong backend engineering experience, especially in Java and Spring Deep understanding of distributed systems and microservices Hands-on experience with AWS , Kubernetes , Docker , and Terraform Familiarity with CI/CD pipelines and testing best practices Solid More ❯
Role: SeniorJavaSoftwareEngineer (pref. Back-end) Salary: £85,000–£100,000 + equity + bens Location: UK Remote Sector: FinTech Start-Up About the Company Wedo are collaborating with a FinTech start-up. The founders have an unrivalled track-record of scaling successful businesses, largely across the FinTech sector. This … board to expedite design and development...the mentality is very much own it, build it, ship it and host it. The Team Circa 30-40 in total. One Lead engineer across both back-end and front-end. This position reports into the CTO. The Stack Java AWS/Heavily Microservices-led React-Typescript React-Native IaC - Terraform More ❯
About The Role Job Level: 9 UK Wide We are looking for a SeniorSoftwareEngineer who will be responsible for designing, developing, and deploying high-quality software solutions. You will work on complex software projects, contributing to the architecture, development, and improvement of software systems. This role … involves mentoring junior engineers, collaborating with cross-functional teams, and driving the adoption of best practices in software development. Responsibilities Design, develop, and maintain complex software solutions, ensuring they are robust, secure, tested and scalable. Contribute to software architecture decisions, ensuring alignment with project and business goals. Mentor and support junior engineers, helping to … develop their skills and promote best practices. Collaborate with cross-functional teams, including product management, UX/UI, DevOps, and QA, to ensure software meets business requirements. Implement and optimise CI/CD pipelines to enhance development efficiency and software quality. Conduct code reviews, providing constructive feedback to enhance team performance and code quality. Troubleshoot and More ❯
JavaEngineer – 6-Month Contract – Hybrid (2 days on site, London) - Day Rate: Up to £650 (Inside IR35) Join a high-performing engineering team working on large-scale, high-availability systems used by millions. This role offers the chance to build and enhance complex backend services in a modern, cloud-native environment. What you’ll be … doing: Designing and developing performant, scalable backend systems using Java (up to Java 21). Building microservices with Spring Boot and related frameworks. Developing and maintaining RESTful APIs and event-driven systems. Writing clean, testable code and following TDD principles. Working closely with DevOps, Product, and QA teams to deliver high-quality solutions. Deploying and supporting … services in AWS with tools such as Lambda, ECS, S3, and CloudFormation. What we’re looking for: Strong experience with Java, Spring Boot, and microservice architecture. Proven background working in cloud environments (ideally AWS). Familiarity with CI/CD pipelines and automation tools. Solid grasp of software testing, TDD, and Agile methodologies. Good communication skills More ❯
JavaEngineer – 6-Month Contract – Hybrid (2 days on site, London) - Day Rate: Up to £650 (Inside IR35) Join a high-performing engineering team working on large-scale, high-availability systems used by millions. This role offers the chance to build and enhance complex backend services in a modern, cloud-native environment. What you’ll be … doing: Designing and developing performant, scalable backend systems using Java (up to Java 21). Building microservices with Spring Boot and related frameworks. Developing and maintaining RESTful APIs and event-driven systems. Writing clean, testable code and following TDD principles. Working closely with DevOps, Product, and QA teams to deliver high-quality solutions. Deploying and supporting … services in AWS with tools such as Lambda, ECS, S3, and CloudFormation. What we’re looking for: Strong experience with Java, Spring Boot, and microservice architecture. Proven background working in cloud environments (ideally AWS). Familiarity with CI/CD pipelines and automation tools. Solid grasp of software testing, TDD, and Agile methodologies. Good communication skills More ❯
We're Hiring: SeniorSoftware Developer Hybrid | 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? We’re looking for a SeniorSoftwareEngineer 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, T-SQL , and Entity Framework Build intuitive UIs with HTML, CSS, JavaScript, and jQuery Develop More ❯
SeniorJava Developer – London/Hybrid – Up to £90,000 + Benefits We’re partnered with an innovative fintech scale-up that’s redefining the credit and lending space. Backed by leading VC investors and operating successfully for the past decade, the business is now entering a new growth phase and looking for a SeniorJava Developer to join their talented engineering team. This is a hybrid role based in central London, typically requiring 3 days per week in the office (with flexible hours). You’ll have the opportunity to work on a modern product roadmap, building next-generation platforms and payment systems that are shaping the future of digital … lending. Tech Stack Java 11+ Spring Boot AWS Microservices architecture Docker/Kubernetes Kafka (or similar messaging tools) Key Responsibilities Design and develop high-performance, low-latency software components. Contribute across the full software development lifecycle. Write and maintain clean, testable, scalable code. Manage and enhance CI/CD and development process tooling. Collaborate More ❯
