18 of 18 Java Software Engineer Jobs in London

exciting opportunity for a Java Software Engineer has arisen with a leading semiconductor company specialising in high-performance mixed-signal processing, based in London. This is an exciting opportunity for a Java Software Engineer to design and evolve cross-platform applications, SDKs, and developer … tooling. You’ll work closely with UX specialists, hardware teams, and software engineers to build polished internal tools that power advanced hardware configuration and tuning workflows. You will commit to a hybrid working model, with a minimum of one day per week onsite in the London office. Experience ...

Full Stack Software Engineer React Typescript Java Banking London This is a new and exclusive opportunity for a Full Stack Software Engineer who is primarily front office focused with React (75%) and Java (25%) to join this thriving front office derivatives team in this … investment bank Role details Title: Full Stack Software Engineer Technical focus - React (75%) and Java (25%) Employer: front office banking derivatives Permanent role salary £85- £125,000 plus bonus and pension Location: London City and home working hybrid 50/50% Technical stack: primarily Front end React ...

Senior Software Engineer/Developer (Java AWS Kafka) London/WFH to £140k Are you a Java technologist who enjoys building systems from scratch? You could be progressing your career, in a senior, impactful role at a global, cloud-native, prime broker that is replacing … custody system, designed for today's complex global markets. The company is experiencing great success and is expanding into the UK. As a Senior Software Engineer you will take ownership of building a brand new Futures Trading platform for the UK, primarily using Java with a focus ...

Senior Java Full Stack Software Engineer - Public Sector Digital Transformation Location: UK (Fully Remote) Type: Permanent Security Clearance: SC cleared/eligible Use your engineering expertise to improve services that millions rely on. We're hiring a Senior Software Engineer to join a mission-driven … quality engineering, enjoy mentoring others, and want your work to have real public impact, this role is for you. The Role As a Senior Software Engineer (Full Stack) you'll design, build and deploy scalable, secure and well-tested software solutions. You'll contribute to architecture decisions ...

Lead Software Engineer – Java Microservices | London (1 day per week on-site) | £74,000 – £92,000 + Package We’re partnering with a leading UK bank to recruit a Lead Software Engineer with strong Java and microservices expertise. This is a hands-on role … building high-performance, scalable software for real-world, high-traffic systems. About the Role You’ll join a permanent feature team, taking end-to-end ownership of services, from design and development to testing, deployment, and optimisation. Your focus will be on building robust microservices that support high-traffic ...

Software Engineer (Java/Full Stack) | Contract-to-Perm | London Location: Liverpool Street, London (Hybrid - 2-3 days onsite) Rate: £550 per day (Inside IR35) Type: Contract-to-Permanent Start Date: Early to Mid-April 2026 The Opportunity We are looking for a versatile Software Engineer … long-term stability or a permanent developer looking to "test-drive" a major modernisation project before committing. The Role As a Full Stack Engineer, you will design and improve software that delivers business-critical capabilities for both customers and internal colleagues. You will work closely with stakeholders-including ...

Java Software Engineer – Data Engineering Up to £70,000 + bonus and benefits 4:1 hybrid in office – City of London Quant Capital is hiring for a small, high-performing market maker in London. This is a junior-to-mid role focused primarily on Java development … PostgreSQL. This is a growing team focused on data ingestion and building tooling for the wider firm. What you’ll do: Build and enhance Java backend services (APIs, batch jobs, integrations) used across the business Write clean, testable code with solid engineering discipline (testing, code review, debugging, production support ...

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 ...

Principal/Senior Java Engineer – Ultra Low Latency Trading Systems Location: London (Hybrid) The Opportunity A leading global quantitative trading firm is seeking an exceptional Java Engineer to join one of the highest-performing engineering teams in systematic trading. This firm operates at the forefront … latency technology, where software performance directly drives trading outcomes. The successful candidate will work on highly optimised, mission-critical trading infrastructure alongside elite engineers, researchers, and traders. This is a highly selective environment focused on technical excellence, ownership, and measurable impact. The Role You will design and build ultra ...

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 ...

Lead/Senior Software Engineer for 12 month contract on site in London. Working for a Big 4 professional services firm delivering software projects. Java, Python, Cloud Native AWS, AI, DevOps, CI/CD - Jenkins/GitLab Lead/Senior Java/Python EngineersBig … Consultancy 12 month contract On site in London Location : London (5 days in office) Duration 12 months Key Skills Proficient in Java/Python concepts and proficient advanced experience. Hands-on practical experience delivering system design, application development, testing, and operational stability, particularly in cloud environments. Advanced knowledge ...

Lead Software Engineer Lead (Java/Python, Cloud & AI) Location : London (5 days in office) Duration 12 months Competitive Day Rate (Inside IR35) Key Expectations from the role: Technical leadership and architecture Delivery ownership AI/ML solution stewardship People leadership Stakeholder and product partnership Controls … governance Key Skills: Expert level proficiency in Java and/or Python. Cloud-native systems on AWS (compute, storage, networking, IAM, KMS, observability). Demonstrated success in leading teams Deep understanding of AI/ML solutions implementation, with emphasis on LLM applications and retrieval-augmented generation. Expertise in modern ...

Title: Java Developer Location: UK Experience: 2–5 years Education: Bachelors in Science (IT/Computer Science/Engineer) Employment Type: Full-Time UK based candidates only. Job Summary: We are seeking an experienced Java Developer with 2 to 3 years of hands-on experience in building … applications using Java , Spring Boot , and Microservices architecture . The ideal candidate should also have a basic understanding of JUnit for testing and cloud platforms . Key Responsibilities: Design, develop, and maintain backend services using Java and Spring Boot Build and maintain microservices and REST APIs In-depth ...

Title - Java Developer with Flink Experience - 8+ Years Location - London, UK Job Description - Strong experience building and operating production Apache Flink applications (event-time concepts, windows/watermarks, state, checkpointing and fault tolerance). ● Hands-on AWS experience operating streaming/data workloads (IAM, networking/VPC basics, deployment … observability and incident troubleshooting). ● Experience integrating Flink with Kafka (including AWS MSK) and cloud services/storage (e.g., S3). ● Highly proficient in Java and Python (production experience required). ● Strong software engineering fundamentals: clean, maintainable code; pragmatic testing; effective code review. ● Comfort mentoring/pairing with ...

Lead/Senior Java/Python Engineers Big 4 Consultancy 12 month contract On site in London Location : London (5 days in office) Duration 12 months Key Skills Proficient in Java/Python concepts and proficient advanced experience. Hands-on practical experience delivering system design, application development, testing ...

Vitality Offices. Full time hours. We are happy to discuss flexible working! Top 3 skills required: To be fully proficient in Java Familiarity with DevOps tools To be able to identify key areas of improvement within Vitality's processes and standards What this role is all about: Software … services fast, secure, and effortless for millions of members. Your expertise helps us deliver smarter, more personalised customer experiences. Key Actions Lead the full software development lifecycle end-to-end—shaping concepts, building solutions, and driving high-quality releases that land smoothly into production. Write clean, secure, well-structured ...

Tech Stack Python AWS (Lambda, ECS, CloudFormation, S3) GitHub Actions (CI/CD) Vue.js (optional frontend involvement) Requirements 2+ years’ experience as a Data Engineer or Backend Engineer Proficiency in Python Experience with Java server side/UI components Strong problem-solving skills and the ability ...