1 to 25 of 36 Java Engineer Jobs in London

Java Engineer - Java Developer - PostGres - Kubernetes - Kafka - TDD - 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 … 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) Working with PostGres Building microservices with Spring Boot and related frameworks Developing and maintaining RESTful APIs and event-driven systems ...

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 ...

Java Engineer Salary to £60k + Company Options Scheme Hybrid working between your home, their offices (London Vauxhall) & client sites. NB: Please only apply if you are a UK National and able to achieve either SC or DV clearance. (SC) 5 years & (DV) 10 years residency … data and deliver citizen services. Theyre growing fast and looking for bright, dynamic people to help build their business. Role Theyre looking for a Java Engineer to join their implementation team. Youll work across Camunda BPMN/DMN process automation, API integration, and microservice orchestration helping their public ...

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. ...

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 📍 Location: London (Hybrid) 💷 Compensation: Up to £170,000 + Bonus + Comprehensive Benefits 🔍 The Role Join a leading FinTech as a Java Engineer and help build their next-generation, low-latency trading platform . This is a hands-on role in a high-performance … where every millisecond matters. Collaborate with top-tier engineers and industry experts to tackle complex, mission-critical challenges , delivering robust, scalable solutions using Core Java . 🔧 What You’ll Be Doing 🧩 Develop high-performance systems in Java for real-time trading applications 🔄 Optimize multithreading, concurrency, and throughput ...

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 ...

Software Engineer/Developer (Java Spring Boot AWS) London/WFH to £65k Are you a backend focused Java Software Engineer looking for an opportunity where you can make an impact? You could be progressing your career at a growing US based tech company that provide … platform for gaming and gambling businesses to retain their customer base, as they expand their UK presence. As a Software Engineer you will be instrumental in helping the company to bring all tech inhouse; you'll design and develop new features and enhancements to the core platform as well ...

Senior Software Engineer - Java (Remote, UK-based setup)Overview Join a world-leading US healthcare pioneer, operating from the UK with fully remote and flexible work options. You'll play a critical role in a cloud-first, API-led platform, contributing 60% of your time to coding … tech to solve real problems.What you'll do Build and deliver applications and integrations in an agile environment Develop cloud-based solutions using Java in a multi-tenant setting Tackle scaling challenges related to performance, security, robustness, and reliability Collaborate with product teams to design technical solutions that meet ...

Director - Lead Software Engineer (Java, Equities) Location: London | Division: Investment Banking | Type: Full-time About the Role We are seeking a Director-level Lead Software Engineer to join our Equities Technology team within the Front Office. This is a hands-on, independent contributor role where you will … closely with traders, quants, and other technologists to deliver innovative solutions in a fast-paced environment. Key Responsibilities Lead the design and development of Java-based trading and risk platforms for equities. Deliver low-latency, high-throughput systems for order management and execution. Collaborate with front-office stakeholders ...

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

Java Full Stack Engineer looking to work on cutting-edge, high-impact digital solutions? Do you want to use your expertise to help shape major transformation programmes across government and secure environments? If you're driven by innovation, value collaboration, and enjoy solving complex technical challenges … love to hear from you. Java Full Stack Engineer (DV Cleared) Consultant Level - Digital Excellence Salary: £46,330-£55,000 Base Locations: London, Manchester, Newcastle or Glasgow Organisation : Global leading IT Consulting Business (Applicants must hold active DV clearance) Are you a Java Full Stack Engineer ...

Backend Staff Engineer/Developer (Java AWS PostgreSQL) London/WFH to £120k Are you a backend focussed technologist with leadership skills? You could be progressing your career, in a senior, hands-on technical leadership role at a technology driven market research company that is scaling rapidly, having … qualifications Private medical care, access to free therapy X2 days per year for volunteering Excellent career development opportunities Your role: As a Backend Staff Engineer you will take a lead role in architecting, developing and scaling the core platform with a focus on backend engineering with Java (there ...

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 ...

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 no periods ...

work on a wide variety of projects and gain exposure to technologies including Java, Kotlin, NodeJS, Spring Boot, RESTful microservices, React, NoSQL databases and cloud platforms. Java Full Stack Engineer - Consultant/Senior Consultant Salary: £45,000-£70,748 Base locations: London, Manchester or Glasgow (Hybrid working … Organisation : Global IT Consultancy Are you a passionate Java Full Stack Engineer looking to build modern, impactful digital solutions across a range of transformation programmes? This is an opportunity to join a dynamic, fast-growing engineering community where you'll work with cutting-edge technologies and deliver meaningful ...

Join a Tier 1 Investment bank in their leading global FX trading platform as a Java Engineer, contributing to the backbone of ultra-low latency systems powering high-volume electronic trading. This role focuses on building high-performance, globally distributed Java services that enable real-time transaction … performance tuning and solve low-level technical bottlenecks Maintain high standards in testing, documentation, and code quality Tech Stack & Skills: Strong proficiency in core Java Exposure to JavaScript/TypeScript & HTML5 is a plus Deep understanding of data structures, algorithms, and performance optimization Familiar with modern SDLC tools ...

Full Stack Engineer/Developer (Java JavaScript) London/WFH to £100k Are you Java technologist with full stack development skills? You could be progressing your career in a hands-on, impactful, Full Stack Engineer role, working on a 'tech for good' product that is helping ...

Backend Software Engineer/SRE (Java JVM) London/WFH to £110k Are you a Backend Software Engineer/SRE with a strong knowledge of Java and JVM internals? You could be progressing your career in an impactful role at a global CFD trading company that … been consistently voted as one of the UKs top employers. As a Backend Software Engineer/SRE you will collaborate with development teams, as a trusted technical advisor to influence system design, ensuring reliability standards and driving improvements across the platform. You'll have a broad scope including hands ...

Java Developer Join a high-impact Core Technology team at a leading hedge fund. About the Company This firm is a major player in the space, a multi-strategy hedge fund with a strong focus on systematic and quantitative trading. Founded by industry veterans, it combines deep financial expertise … with advanced software engineering to manage institutional capital globally. What You’ll Do Design and build high impact internal systems using Java Own projects end-to-end: from architecture to deployment Collaborate with analysts to solve real-world business problems Support and mentor junior team members on coding ...

Backend Engineer, Contract | Python (Django), Java and Rust | Fully Remote/EU-Based | Rate £550-650pd, Outside IR35 | 12-months Contract Length Opportunity: We're supporting a fast-moving client at huge global scale, that is in need of a Senior Backend Contractor with deep experience across … Python, Django and some Java and Rust. This is a high-impact freelance role within a tech-driven established team - building scalable systems in a modern backend environment and implementing AI work. What You'll Be Doing as a Backend Engineer, Contract | Python (Django), Java and Rust ...

Senior Java/Kotlin Engineer – Technology Consultancy Location: Hybrid (2 days a week in London) Type: Full-time Salary - £130k Maximum Client They are forward-thinking technology consultancy that helps organisations solve complex problems with elegant, modern engineering. The team is built around curiosity, delivery excellence, and genuine … retail, healthtech, scale-ups, and the public sector to design and build high-impact digital products. The Role We’re looking for a Senior Java/Kotlin Engineer who thrives in solving real-world problems and building robust, scalable systems. You’ll work closely with cross-functional project ...

Software Engineer in Test (Java backend & APIs) | Fintech Trading £70,000 - £90,000 + Bonus + Benefits Hybrid - 3 days/week in Central London Join a collaborative, engineering-led team ensuring the stability and performance of a high-volume, global electronic trading platform. You'll write clean … quality Java-based automation code to contribute to an internal Java-based test automation framework, catching issues before they hit production and helping deliver flawless, high-performance user experiences. What You'll Do Build and maintain robust Java test automation Work on an internal Java-based ...

Java Software Engineer Location: London Business Unit: Central Government, Law Enforcement and National Security Level: Mid-Senior Employment Type: Permanent Clearance: Must hold active UK Security Clearance About the Opportunity We are partnering with several businesses seeking experienced Java Software Engineers to help deliver mission-critical capabilities … backlog refinement. Contributing to technical strategy, innovation, and tactical upskilling across emerging technologies. Key Skills & Experience Strong commercial experience with Spring Boot and Java Enterprise development. Front-end proficiency with React , Vue.js , or AngularJS . Experience with modern testing frameworks and TDD. Ability to work across ...