1 to 25 of 36 Java Engineer Jobs in the City of London

Backend Engineer, Java, Kotlin, AWS | Fintech, Payments Platform (B2B) | London, Hybrid (2 days per week) | Salary Up to £80,000+ Bonus & Benefits The Company We are working with a international Fintech Start-Up in the payments space who are completely changing the game for how payments work … will be working with the lastest cloud natve technologies in a cross functional team and delivering real value to customers. Responsibilities for the Backend Engineer, Java, Kotlin, AWS | Fintech, Payments Platform (B2B) | London, Hybrid (2 days per week) | Salary Up to £80,000+ Bonus & Benefits Design, implement ...

Senior Java Engineer London Salary: £70,000 - 80,000 Bonus: TBC This is a hybrid role that requires 3 days a week office attendance About the Company An exciting opportunity has arisen for a Senior Java Engineer to be part of a highly innovative forward thinking … bespoke best-of-breed banking technology, a single platform delivering loan issue, card issue and recovery. We’re looking for an exceptional Senior Java Engineer who will work closely with the Java Team Lead & CTO as we scale up and modernise our business processes and tech stack. ...

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 in 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 meetups ...

Java Engineer – 6-Month Contract – Hybrid (2 days on site, London) - Day Rate: Up to £700 (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 … 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. ...

Have you got a strong educational background from a Russell Group University? Do you have experience working in the financial industry? 💸 Java Software Engineer – FinTech Scaleup 💸 📍 Location: Hybrid working in Central London 💰 Salary: £80,000-100,000 + bonus We are very excited to once again be partnered … used by hedge funds and asset managements around the world. Due to an exciting pipeline of upcoming projects, they are looking for Core Java Software Engineers to join their team. You will be an excellent fit for this Core Java Engineer position if you: Have built scalable ...

Lead Java Engineer 6 Months initial contract 3 Days per week on site in Canary Wharf £Market Rate (Inside IR35) As a Lead Java Engineer, you will be responsible for technical leadership and delivery of one or more Java and Data intensive applications that … robust technology environment with a clear appreciation of software development best practices and Agile releases trains Strong experience within server-side development in Java, SQL, Search Technologies, Messaging Technologies with a good understanding of Kubernetes, Dockers and preferably some exposure to GCP (Google Cloud Platform), ReactJS, Python, Big Data ...

Java Engineer - Contract (outside IR35) A Forex Brokerage based in London and are looking for an experienced Java Engineer with strong FIX API (server-side) expertise to join on an initial 3 month contract. This a key role working on high-performance, low-latency trading infrastructure … used in live market environments. What You’ll Be Doing Design, develop, and maintain server-side Java applications for FIX connectivity Build and support FIX API integrations with liquidity providers, banks, and trading venues Optimise systems for low latency, high throughput, and reliability Collaborate closely with trading, infrastructure ...

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 the team … 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 of an Agile ...

Full Stack Software Engineer Java React 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 £70-85,000 plus bonus and pension Location: London City and home working hybrid 50/50% Technical stack: primarily React focused with a java base ...

Java Full Stack Engineer – Consultant/Senior Consultant Salary: £55,000 – £70,748 base plus benefits, perks, and healthcare options! Base Locations: London, Manchester, Newcastle or Glasgow (Hybrid working - operate out of any base!) Organisation : Global IT consultancy Are you a passionate Java Full Stack Engineer … engineering community where you’ll work with cutting-edge technologies and deliver meaningful outcomes for clients across the UK. About the Role As a Java Full Stack Engineer, you’ll be responsible for designing, building and delivering high-quality digital products that solve complex business challenges. ...

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 application delivery … 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). ...

Software Engineer | Java Microservices | London (1 day per week on-site) | £63,000 – £74,000 We’re partnering with a leading UK financial services organisation to recruit a Software Engineer with strong Java and microservices experience. This is an excellent opportunity for someone looking to take … meaningful technical challenge within a highly reputable institution undergoing significant digital transformation. The Role As a Software Engineer, you’ll join a dedicated feature team responsible for designing, engineering and maintaining high-performance, secure and robust software solutions. You’ll work closely with engineers, architects and business analysts across ...

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 … such as e-commerce search functionality, streaming platform logins, or other large-scale consumer-facing systems. What We’re Looking For Proven experience developing Java microservices for high-traffic applications (retail, e-commerce, media, or streaming platforms). Hands-on experience with the full software lifecycle in agile environments ...

Fullstack Java Software Engineer | Climate-Tech 💵 £75,000 – £95,000 + equity 📍 Remote (UK) with optional weekly meet-ups in Central London 📈 Revenue-generating, early-stage climate-tech business 💻 Java, JavaScript, CI/CD, Cloud Platforms We’re partnered with a venture-backed climate-tech insurer tackling … raised significant capital to support their insurance balance sheet, and are planning a Series A next year. They’re now hiring a dedicated Software Engineer to take ownership of core platform work and integrations. You’ll be trusted to design, build and improve production-grade code in a small ...

Java & Spark Engineer 12 month contract Hybrid - London (3 days per week in the office) INSIDE IR35 AM Analytics offers a scalable, ML-ready platform for rapid portfolio model development and deployment. It combines data governance, Big Data, and AI—including GenAI capabilities— to boost alpha generation, enhance … Azure-native Databricks. Responsibilities include: migrating and optimizing 500+ jobs using Databricks optimization techniques, managing 12 TB of data, tuning models for Azure with Java Spark and Delta tables, and addressing vulnerabilities through library version updates. Current Tech Stack: Python, Data Science, Gen AI (GPT, Embeddings, Document Intelligence), Java ...

Java/Kotlin Engineer Join one of the UK’s fastest-growing challenger banks as we continue to redefine what modern banking looks like. We’re building secure, scalable, and intuitive financial products — and we’re looking for talented Java/Kotlin Engineers to help us shape … future. About the Role As a Backend Engineer, you’ll be part of a high-performing, cross-functional engineering team working on systems that power millions of daily customer interactions. You’ll design and build event-driven, cloud-native services using modern JVM technologies — with a strong emphasis ...

Java Software Engineer About the company We’re building a modern loyalty platform used at scale, and we’re looking for Java Engineers to help shape and grow our microservices architecture. There will also be the chance to use Kotlin on new future projects. What … Build and evolve Java microservices using Spring Boot Design scalable, resilient services in a distributed environment Collaborate with product, QA and DevOps teams Write clean, testable, production-quality code What we’re looking for Strong experience with Java Hands-on experience with Spring Boot & Microservices Experience building REST ...

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 for a 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. Key Responsibilities Design ...

Software Engineer (Backend) – Java London, UK up to 100k + equity You’ll be joining a high-calibre engineering team building the backend systems that power a next-generation, AI-driven wealth management platform. This is a role for an engineer who wants meaningful ownership: designing distributed … scalable APIs and microservices at the core of the platform Designing and evolving distributed systems powering automation, integrations, and client operations Writing clean, maintainable Java (17/21) with strong emphasis on TDD, DDD, and CI/CD Leading greenfield feature development while also refining and improving existing systems ...

Role: Low Latency Java Engineer - Up to £100k Base Salary + Bonus Salary: Up to £100k Base Salary + Bonus Location: London Skills: Java, Multithreading, Concurrency, any focus on performance This firm is an elite tech scale up with extremely high tech standards. They are made ...

seeking an experienced Senior Java Software Engineer to join the IT team at a leading bank, supporting the delivery, maintenance, and enhancement of core systems across various business areas, including operations, compliance, transactions, and client management. This is a 6-month contract role offering an excellent day rate … government/public sector organisations. In this role, you will be an integral part of the software development lifecycle, working closely with Senior Java Developers, UI/UX teams, and Agile Transformation to architect, build, and deliver greenfield, brownfield, and integration applications. You will be expected to employ best ...

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 ...

seeking an experienced Backend Engineer to join the IT team at a leading bank, supporting the delivery, maintenance, and enhancement of core systems across various business areas, including operations, compliance, transactions, and client management. This is a 6-month contract role offering an excellent day rate, ideally suited … government/public sector organisations. In this role, you will be an integral part of the software development lifecycle, working closely with Senior Java Developers, UI/UX teams, and Agile Transformation to architect, build, and deliver greenfield, brownfield, and integration applications. You will be expected to employ best ...

Latency Java Developer - AVP London - 3 days in office up to £95,000 base Join a leading Fixed Income Trading team at an Investment bank to help redesign, rebuild and modernize their core rates trading platform. This area of the business are performing extremely well, seeing very strong returns. … supporting various trading workflows. This project has multiple years of innovation and strategic development to be done. This is all done in low latency java, with latency at around 10 milliseconds. Requirements: 4+ years experience in Java Development Core Java, async programming, multi-threading Strong System Architecture ...

Software Engineer/Developer (Full Stack Java) London/WFH to £100k Are you Java technologist? You could be progressing your career in a hands-on, impactful, Software Engineer role, working on a 'tech for good' product that is helping to drive efficiencies … complex real-time shift rota application, hosted on AWS and available via the web or mobile device (iOS/Android). As a Software Engineer you will play a crucial role in re-architecting and enhancing the scheduling platform to a Java and Angular codebase (from Ruby ...