1 to 25 of 37 Permanent Java Software Engineer Jobs in the UK

Senior Java Software Engineer - User Interfaces Location: Office basedGuildford, GU1 4QU Salary: Circa £50K - £85K per annum, DOE + Benefits, Bonus and Relocation Contract: Full time, Permanent Benefits: Competitive salary, Annual bonus, Private medical insurance, Membership fees to professional organisations, such … Kaon's success is a result of the skills and effort of our engineering team which is made up of signal processing, acoustic, software and systems engineers. Due to our continued success, we are looking to expand our highly skilled engineering team. The Role: We are currently seeking ...

Java Software Engineer Bristol (Hybrid – 3 days per week) Up to £50,000 ClimateTech Want to grow your backend skills while working on meaningful climate tech? At Bohr, the software you build helps reduce methane emissions across Europe’s gas networks. This is an opportunity … high-potential junior or early mid-level Java engineer to work on real-world systems that directly support cleaner, safer infrastructure and the transition to net zero. About Bohr Bohr exists to decarbonise energy through innovation. Through our methane emissions division, Tectrac, we combine mobile leak detection technology ...

Java Software Engineer (Developer/Senior/Principal) Complex Systems | Modern Stack | Agile & XP Culture Remote First (office visit approx. once per month - South Manchester) £50,000 - £85,000 + Bonus + Excellent Benefits (level dependent) We're partnering with a long-established technology business building modern … platforms at the heart of a complex, highly regulated domain. With continued growth across their product suite, they're now hiring Java Software Engineers across multiple levels - Developer, Senior, and Principal - to join their Scrum teams and help deliver software that genuinely makes a difference. The Opportunity ...

Backend Software Engineer/Developer (Java AWS Spring) London/WFH to £90k Are you a backend focussed technologist who enjoys building systems from scratch? You could be progressing your career at a global, prime broker that is replacing the legacy infrastructure used across capital markets with … today's complex global markets. The company is experiencing great success in the US and is expanding into the UK. As a Backend Software Engineer you will join a small team responsible for building a brand new Futures Trading platform for the UK, primarily using Java with ...

Full Stack Java Software Engineer (React.Js) required for my client in London. Paying £50k-£75k. My client are a growing B2B & B2C technology company. They require a Full Stack Java Software Engineer (React.Js) to join them on a full-time basis. This role … remote but there is expectation to ideally go to the office 1 day per week in London. Required experience Java 18+ experience Spring/Spring Boot PostgreSQL or similar Maven/Gradle REST APIs Microservices React.Js Desirable: Vue.Js experience ...

Java Software Engineer A leading trading firm in London is growing its engineering team and is looking for a high-performance Java Engineer to help build ultra-low-latency systems used directly on live trading desks. What You’ll Be Doing Designing and building … latency Java systems used in electronic trading Developing highly concurrent, multithreaded applications Optimising performance at the microsecond level Working closely with traders, quants, and infrastructure teams Improving throughput, stability, and execution speed Writing clean, well-tested production code What We’re Looking For Strong commercial experience with Core Java ...

Java Software Engineer – Defence, Cyber & Intelligence | Full-Time | eDV Clearance Required We are seeking Software Engineers at all levels to join a leading aerospace and defence organisation, delivering mission-critical software for high-impact programmes in the Defence, Cyber, and Intelligence sectors. You'll work … across the UK. This is a fantastic opportunity to contribute to meaningful projects while enjoying flexible working arrangements and excellent development opportunities. Key Responsibilities: Software design, development, and debugging on secure systems Creating and maintaining test frameworks (e.g., JUnit 5) Developing in Linux environments with modern languages (Java ...

Java Software Engineer Defence, Cyber & Intelligence Full-Time eDV Clearance Required We are seeking Software Engineers at all levels to join a leading aerospace and defence organisation, delivering mission-critical software for high-impact programmes in the Defence, Cyber, and Intelligence sectors. You'll work … across the UK. This is a fantastic opportunity to contribute to meaningful projects while enjoying flexible working arrangements and excellent development opportunities. Key Responsibilities: Software design, development, and debugging on secure systems Creating and maintaining test frameworks (e.g., JUnit 5) Developing in Linux environments with modern languages (Java ...

Senior Java Engineer (Core Java) £100,000 - £130,000 Central London - Hybrid A high-growth, privately backed Enterprise SaaS company is seeking a Senior Core Java Engineer to join its London-based engineering team. The organisation builds large-scale, mission-critical platforms used by some … throughput distributed systems, solving complex engineering problems at scale within a collaborative, high-performing team. Key Responsibilities Design, build and maintain high-performance distributed Java services Contribute across design, development, testing, deployment and support Collaborate closely with other engineers to deliver customer-centric solutions Mentor and be mentored within ...

Role: Software Engineer Location: 1-2 days a week in London Salary: £80,000 - £115,000 + Bonus Are you a motivated java micro-services specialised software engineer looking to elevate your career? This is an opportunity for a technically minded individual to be designing … liaising with principal engineers, architects in the domain and other key stakeholders to understand how the platform works We are looking for a senior engineer we can find to take part in some of the largest up coming projects in the banking industry Ideal Candidate: We're looking ...

Role Overview We are seeking a Java Software Engineer to join a small, technically rigorous founding team building complex, data-intensive engineering systems. The role is remote-first, with periodic in-person collaboration in Oxford or San Francisco. The position involves close collaboration with the Founding Engineer on backend infrastructure, internal platforms, and system architecture. In addition to core software engineering responsibilities, the role requires precision in technical communication, documentation, and cross-lingual collaboration with external technical resources. Key Responsibilities Backend Engineering Design, implement, and maintain backend services using Java and Spring Boot . ...

Role: Software Engineer (Java) Location: London Salary: Competitive salary and package (Depending on level of experience) Any offer of employment is subject to satisfactory BPSS and the candidate being granted a level of security clearance which typically requires 10 years continuous UK address history, usually including ...

Software Engineer | Building Intelligent Systems That Make an Impact Central London 4 or 5 days a week on site Existing SC or DV Clearance is required National Security Sector An exciting opportunity has arisen for a Software Engineer to join a cutting-edge team developing impactful … contribute to projects such as AI-powered tools for analysts and operators, secure data pipelines, and innovative prototypes that explore new frontiers in software capability. You’ll become part of a tight-knit, highly capable engineering group that values independence, precision, and tangible outcomes. This is a place ...

Software Engineer | Building Intelligent Systems That Make an Impact Cheltenham 4 or 5 days a week on site Existing DV Clearance is required National Security Sector An exciting opportunity has arisen for a Software Engineer to join a cutting-edge team developing impactful, mission-driven technology. … contribute to projects such as AI-powered tools for analysts and operators, secure data pipelines, and innovative prototypes that explore new frontiers in software capability. You’ll become part of a tight-knit, highly capable engineering group that values independence, precision, and tangible outcomes. This is a place ...

Java Software Engineer with around 3-6 years professional, post-graduate experience sought by one of the original Quantitative Hedge Funds, with a 20+ year track-record. The firm are renowned for a healthy, supportive, and collegiate working environment and culture, with no siloes, boasting an industry … leading staff tenure. This hire will be part of a core Software Engineering team, responsible for the vast majority of all applications in the business from front-to-back office.This includes Order Management & Trading Execution, Risk & Finance, Straight-Through-Processing and Corporate Functions. The team deal directly with business ...

Graduate Quant Software Engineer (C++/Java – Trading Systems) | £55,000–£77,000 | Hybrid (London/Remote) Build technology that powers real trading. Join a high-performance engineering team developing low-latency, resilient backend systems used in live trading environments. You’ll work on complex technical challenges … from day one, building software that genuinely impacts how markets operate — not just writing code in the background. This is a fast-growing fintech where strong engineers progress quickly into Senior, Low-Latency, or Quant-Engineering tracks within 12–24 months. What You’ll Do Design, build, and optimise ...

Level Software Engineer (Java/AWS) Contract | £350 per day Inside IR35 | Hybrid (1 day pw London) We’re supporting a large, well-established UK organisation on a key digital delivery programme and are looking for two mid-level Software Engineers to join an existing engineering … cloud-based services. The role You’ll be working as part of a cross-functional engineering team, contributing to the development and maintenance of Java-based microservices running in an AWS environment. The team values: Clear communication Collaborative problem-solving Strong testing practices Pragmatic, well-documented solutions This ...

Senior Java Software Engineer - User Interfaces Location: Office basedGuildford, GU1 4QU Salary: Circa £50K - £85K per annum, DOE + Benefits, Bonus and Relocation Contract: Full time, Permanent Benefits: Competitive salary, Annual bonus, Private medical insurance, Membership fees to professional organisations, such ...

tcs.com or call TCS London Office number 02031552100 with the subject line: “Application Support Request”. Ready to utilise your skills and experience in Java, API automation and modern engineering practices? We have an exciting role for you – Java Engineer! Careers at TCS: It Means More … biggest brands in the UK and collaborate with global experts. Build strong relationships with a diverse set of stakeholders. The Role As a Java Engineer , you will play a critical role supporting our client in the financial services industry. You will work across cutting‐edge platforms including Payment ...

Java Backend Engineer (Contract) 6 months Fully remote (EU) Rate: 250–300 EUR/day We are looking for an experienced Java Backend Engineer to join a cross-functional delivery team building a modern data integration layer for a healthcare technology platform. The team is responsible … strategies, pagination, resilience patterns and service health • Participate in code reviews and knowledge sharing within the team Required skills • Solid hands-on experience with Java (11+) and Spring Boot in production • Strong understanding of concurrency, collections and JVM fundamentals • Experience with RESTful APIs; GraphQL experience beneficial • SQL and NoSQL ...

Please find the Job Description:- Role: Senior Java Developer Location: Farnborough/UK (Hybrid) Hybrid mode of work Exp range:8+ years Mandatory skills: Java Springboot, Java 17/11, AWS, Pipeline, Financial domain, Spark. JD: Java Tech Lead job involves leading and mentoring a Java development team, analyzing and designing software solutions, ensuring adherence to best practices and coding standards, and collaborating with product managers and other stakeholders to deliver high-quality products for the financial services industry. Key responsibilities include coding, debugging, and maintaining applications, conducting code reviews, troubleshooting complex technical issues ...

Backend Software Engineer/Developer (Java AWS Spring) London/WFH to £90k Are you a backend focussed technologist who enjoys building systems from scratch? You could be progressing your career at a global, prime broker that is replacing the legacy infrastructure used across capital markets with ...

Full Stack Software Engineer Join a trusted supplier delivering mission-critical solutions in the defence and national security sector. You will work on leading-edge technologies across AI/Data Science, Cyber, Cloud, DevOps/SRE, and Platform Engineering, developing solutions that protect people, platforms, and information against … constantly evolving threats. The Role As a Full Stack Software Engineer, you will design, develop, and maintain mission-critical softwares. You will work on novel products that combine physical and digital systems, collaborate closely with clients to define strategy, and explore emerging technologies. Key responsibilities include: Writing clean ...

Senior Java Developer - Java, Springboot & AWS – paying up to £650/day (Inside IR35) – Hybrid (2x a week - London) – 6 month contract Our client is seeking a Senior Java Developer who is passionate about clean code, cloud-native systems, and building technology that makes a real impact. … 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 ...

client is re-engineering their cloud-based practice management platform and looking for a Java Engineer to help take it global. You'll work hands-on with Java, Spring Boot, Azure, and modern cloud-native tech, building scalable, mission-critical systems used by thousands every day. What … Design and build cloud-native services with Java & Spring Tackle scale, performance, security, and reliability challenges Help modernise a large Azure platform (Kubernetes, Docker, Terraform) Coach junior engineers and influence technical decisions What you'll bring 5+ years' Java experience (Spring/JEE) Strong API, database ...