151 to 175 of 228 Java Jobs in the City of London

Java Developer - £100,000 - £140,000 – London/Hybrid Java 21 | Microservices | Spring boot | AWS | Startup | Scaleup | Fintech | Banking | Amazon Web Services | PostgreSQL | Are you a Java Developer who wants to have a voice within the team? Maybe you want to join a fast growing company with lots of progression. If so I have a role for you. Opus have … partnered with a VC Backed Fintech start-up who are looking to grow their London office. They are growing quickly so are looking for Java Developers of all levels from Mid – Tech Lead to join the team. They are currently about 100 people strong and looking to double this within the next 12 months. As a Developer you will be … building and maintaining high performing back end systems. The sort of projects you will be involved in is building API’s , developing microservices and upgrading existing systems. Experience needed – Java 21 TDD AWS They’re also looking for people who have worked within a fast paced Startup/scaleup company. What is in it for you? Hybrid working More ❯

solutions to our global clients. Our collaborative culture, global footprint, and commitment to continuous learning create an environment where innovation thrives and careers grow. Role Summary We are hiring: Java Architect -Devops &AWS || HCLtech || Java Technical Specialist with DevOps,AWS Architecture. Job Summary : The Technical Specialist will be responsible for managing DevOps solutions, AWS architecture, and Java applications. The role … involves ensuring efficient and reliable operation of cloud based systems, implementing automation processes, and optimizing Java applications. The Technical Specialist will collaborate with cross functional teams to drive innovation and continuous improvement in software development processes. Key Responsibilities : Design and implement devops solutions to automate and streamline operations. Create and maintain aws cloud architectures for scalability, security, and performance. Develop … and maintain java applications with a focus on efficiency and reliability. Monitor system performance and implement optimizations as needed. Collaborate with software development teams to troubleshoot issues and implement solutions. Stay updated on emerging technologies and best practices in devops, aws, and java development. Skill Requirements: Proficient in devops methodologies and tools such as jenkins, docker, and kubernetes. Strong understanding More ❯

solutions to our global clients. Our collaborative culture, global footprint, and commitment to continuous learning create an environment where innovation thrives and careers grow. Role Summary We are hiring: Java Architect -Devops &AWS || HCLtech || Java Technical Specialist with DevOps,AWS Architecture. Job Summary : The Technical Specialist will be responsible for managing DevOps solutions, AWS architecture, and Java applications. The role … involves ensuring efficient and reliable operation of cloud based systems, implementing automation processes, and optimizing Java applications. The Technical Specialist will collaborate with cross functional teams to drive innovation and continuous improvement in software development processes. Key Responsibilities : Design and implement devops solutions to automate and streamline operations. Create and maintain aws cloud architectures for scalability, security, and performance. Develop … and maintain java applications with a focus on efficiency and reliability. Monitor system performance and implement optimizations as needed. Collaborate with software development teams to troubleshoot issues and implement solutions. Stay updated on emerging technologies and best practices in devops, aws, and java development. Skill Requirements: Proficient in devops methodologies and tools such as jenkins, docker, and kubernetes. Strong understanding More ❯

Senior Software Engineer – Backend (Java) 📅 6-Month Contract | 🏢 Hybrid (2 Days in Office) | 💷 £600 p/d inside ir35 We’re looking for a skilled Backend Java Engineer to join an innovative team on a 6-month contract. If you love solving complex problems, mentoring others, and working on cutting-edge data platforms at scale- this one’s for you … What you’ll do: 💻 Develop and maintain scalable, data-driven applications in Java 🛠️ Lead on requirements, design workshops, and solutioning 🤝 Mentor junior engineers and share best practices ☁️ Implement & optimise microservices and distributed systems on GCP (GKE, PubSub, BigQuery, Dataflow) using Docker & Kubernetes 🔄 Build and manage efficient data pipelines with streaming tech + relational/NoSQL databases ✅ Ensure high quality through … integration, and non-functional testing ⚡ Contribute to CI/CD practices with Jenkins and Git 🕵️ Troubleshoot, propose improvements, and stay ahead of emerging technologies 💡 What you’ll bring: 🔑 Strong Java & OOP experience 📊 Background in data platforms, frameworks & streaming technologies 🧩 Familiarity with microservices & distributed systems ☁️ Exposure to GCP (GKE, PubSub, BigQuery) 🗄️ Experience with relational/NoSQL databases 🐳 Proficiency with Docker & Kubernetes More ❯

Senior Software Engineer – Backend (Java) 📅 6-Month Contract | 🏢 Hybrid (2 Days in Office) | 💷 £600 p/d inside ir35 We’re looking for a skilled Backend Java Engineer to join an innovative team on a 6-month contract. If you love solving complex problems, mentoring others, and working on cutting-edge data platforms at scale- this one’s for you … What you’ll do: 💻 Develop and maintain scalable, data-driven applications in Java 🛠️ Lead on requirements, design workshops, and solutioning 🤝 Mentor junior engineers and share best practices ☁️ Implement & optimise microservices and distributed systems on GCP (GKE, PubSub, BigQuery, Dataflow) using Docker & Kubernetes 🔄 Build and manage efficient data pipelines with streaming tech + relational/NoSQL databases ✅ Ensure high quality through … integration, and non-functional testing ⚡ Contribute to CI/CD practices with Jenkins and Git 🕵️ Troubleshoot, propose improvements, and stay ahead of emerging technologies 💡 What you’ll bring: 🔑 Strong Java & OOP experience 📊 Background in data platforms, frameworks & streaming technologies 🧩 Familiarity with microservices & distributed systems ☁️ Exposure to GCP (GKE, PubSub, BigQuery) 🗄️ Experience with relational/NoSQL databases 🐳 Proficiency with Docker & Kubernetes More ❯

Senior Java Software Engineer/Team Lead (FX Trading) London to £135k Do you have advanced Java technical knowledge combined with team leadership skills and a strong knowledge of Capital Markets? You could be progressing your career at the Investment Management arm of a global bank. As a Senior Java Software Engineer/Team Lead you will head up a … small, globally distributed team responsible for writing production quality Java code used for pricing and hedging FX instruments and overseeing the algorithms' performance intraday. You'll spearhead a project to modernise the FX Risk and post-trade platform to a modern microservices environment, collaborating with the business and providing technical guidance, code reviews and 1-2-1s to develop … Location/WFH: You'll be based in the London office and have flexibility to work from home once a week. About you: You have a deep knowledge of Java including multithreading You have team leadership experience, including technical project leadership, code reviews, 1-2-1s, developing others You have experience in a Capital Markets environment, FX preferred You More ❯

coding practices, system design, but also importantly be responsible for managing and inspiring their squad to achieve their performance metrics. You can have a background in any language ( Python, Java, .Net, etc) although the squad will be formed of Ruby Developers. Requirements: Ideally a Comp Sci degree or related discipline Prior hands on programming experience in any OOP language More ❯

and support of OpenLink Endur products (incl. cMotion, pMotion or gMotion) or similar/competing solutions packages. Technical expertise in areas like AVS, Connex Frameworks (including exposure to OpenLinks Java Framework and TIBCO integration), VB toolkit, JVS, OpenComponents, or equivalent of other packages Familiar with E/CTRM architecture (functional and deployment) and data model. Product configuration expertise (applicable to More ❯

coding practices, system design, but also importantly be responsible for managing and inspiring their squad to achieve their performance metrics. You can have a background in any language ( Python, Java, .Net, etc) although the squad will be formed of Ruby Developers. Requirements: Ideally a Comp Sci degree or related discipline Prior hands on programming experience in any OOP language More ❯

and support of OpenLink Endur products (incl. cMotion, pMotion or gMotion) or similar/competing solutions packages. Technical expertise in areas like AVS, Connex Frameworks (including exposure to OpenLinks Java Framework and TIBCO integration), VB toolkit, JVS, OpenComponents, or equivalent of other packages Familiar with E/CTRM architecture (functional and deployment) and data model. Product configuration expertise (applicable to More ❯

post-placement follow-up Build and maintain strong client relationships, understanding their hiring needs and providing market insights Source and screen candidates for technical roles (SAP, ERP, CRM, DevOps, Java, Cloud, Digital, Blockchain, etc.) Negotiate offers and manage the end-to-end placement process Meet and exceed agreed KPIs and revenue targets Requirements Minimum 12 months 360 recruitment experience (tech More ❯

on, resilient, and ready to build from the ground up. 🧬 Culture Snapshot 🏢 Hybrid working (Tues & Thurs in-office, flexibility expected). 👕 No dress code – substance over style. 🧑 💻 Tech-first, Java-based stack, bespoke systems. 💼 Flat structure, direct access to leadership. 💰 Debt-free, cash-rich, consistently profitable. 🚀 Opportunity to shape a new function and drive real impact. More ❯

on, resilient, and ready to build from the ground up. 🧬 Culture Snapshot 🏢 Hybrid working (Tues & Thurs in-office, flexibility expected). 👕 No dress code – substance over style. 🧑 💻 Tech-first, Java-based stack, bespoke systems. 💼 Flat structure, direct access to leadership. 💰 Debt-free, cash-rich, consistently profitable. 🚀 Opportunity to shape a new function and drive real impact. More ❯

Lead Java Architect – Greenfield Digital Asset Platform (12 Month Extendable Contract Inside IR35 - mostly remote - City of London) Are you a hands-on Architect with a "builder" mindset, ready to lead the development of a ground-breaking FinTech platform from the ground up? We are seeking an exceptional Lead Java Architect to spearhead a speculative, greenfield project aimed at revolutionising … What you'll bring to the table: Proven "Builder" Experience: A demonstrable history of architecting and building complex, greenfield systems from concept to a fully deployed product. Expert-Level Java Architecture: Deep expertise within the JVM ecosystem, with extensive experience using modern frameworks like Spring Boot to build robust microservices and a strong grasp of enterprise patterns (e.g., event-driven More ❯

Lead Java Architect – Greenfield Digital Asset Platform (12 Month Extendable Contract Inside IR35 - mostly remote - City of London) Are you a hands-on Architect with a "builder" mindset, ready to lead the development of a ground-breaking FinTech platform from the ground up? We are seeking an exceptional Lead Java Architect to spearhead a speculative, greenfield project aimed at revolutionising … What you'll bring to the table: Proven "Builder" Experience: A demonstrable history of architecting and building complex, greenfield systems from concept to a fully deployed product. Expert-Level Java Architecture: Deep expertise within the JVM ecosystem, with extensive experience using modern frameworks like Spring Boot to build robust microservices and a strong grasp of enterprise patterns (e.g., event-driven More ❯

Remote with rare travel to site in London My client, a government body are looking for a Senior SDET to join their fast-paced team with some experience in Java coding (OOP, SOLID), Building automation platforms and frameworks. This role will include but is not limited to: Working with the product team to define the acceptance criteria and testing DOD … ensure test best practice, continual improvements and appropriate standards are adhered to Must have excellent written and verbal communication skills, experience working in Agile delivery teams using TDD with Java and be able to work autonomously. Experience of PACT frameworks that enable Consumer Driven Contract testing is desirable Understanding of CI/CD pipelines and their importance in Automation Testing More ❯

Exchange Trading Location: London (Hybrid) About the Role: We are working on behalf of a leading player in the digital asset and trading infrastructure space, currently hiring a Senior Java Software Developer to join their high-performance trading systems team. This position focuses on exchange connectivity and ultra-low latency trading infrastructure, supporting both spot and derivative markets across global … hybrid infrastructure stack. Ensure compliance with rigorous uptime, latency, and security standards. Drive automation to streamline trading workflows and reduce operational risk. Key Skills & Experience: 10+ years of commercial Java development experience in performance-critical environments. Strong understanding of exchange-facing protocols (e.g., FIX, binary, custom APIs). Advanced skills in JVM tuning, garbage collection optimisation, and memory management. Expertise More ❯

Exchange Trading Location: London (Hybrid) About the Role: We are working on behalf of a leading player in the digital asset and trading infrastructure space, currently hiring a Senior Java Software Developer to join their high-performance trading systems team. This position focuses on exchange connectivity and ultra-low latency trading infrastructure, supporting both spot and derivative markets across global … hybrid infrastructure stack. Ensure compliance with rigorous uptime, latency, and security standards. Drive automation to streamline trading workflows and reduce operational risk. Key Skills & Experience: 10+ years of commercial Java development experience in performance-critical environments. Strong understanding of exchange-facing protocols (e.g., FIX, binary, custom APIs). Advanced skills in JVM tuning, garbage collection optimisation, and memory management. Expertise More ❯

will have good solid experience of having work on Genesys Clould projects. The Technical Architect will have experience in; - Genesys Cloud - Genesys Engage - AI/Ml - CRM - API Integration - Java/Pyton Experience Technical Architect - Genesys Cloud - 6 Months - Inside IR35 Randstad Technologies is acting as an Employment Business in relation to this vacancy. More ❯

architecture with direct ownership of RFx processes and multiple successful £5m+ bids Broad architecture experience across cloud platforms, application integration, and modernisation strategies Strong technical foundation in backend engineering (Java, C#) and modern application development practices Consultative selling expertise with ability to shape client requirements and drive solution differentiation Exceptional presentation and stakeholder management skills - comfortable influencing procurement committees and More ❯

architecture with direct ownership of RFx processes and multiple successful £5m+ bids Broad architecture experience across cloud platforms, application integration, and modernisation strategies Strong technical foundation in backend engineering (Java, C#) and modern application development practices Consultative selling expertise with ability to shape client requirements and drive solution differentiation Exceptional presentation and stakeholder management skills - comfortable influencing procurement committees and More ❯

Fidessa Developer (Java Spring Boot API) London to £135k Do you have strong Java coding skills combined with experience of developing on the Fidessa order management system? You could be progressing your career at the Investment Management arm of a global bank, gaining an indepth knowledge of Capital Markets. As a Fidessa Developer you will design and develop new features … Location/WFH: You'll be based in the London office and have flexibility to work from home once a week. About you: You have a deep knowledge of Java including Spring Boot and APIs You have strong experience of developing on Fidessa You have an understanding of Capital Markets You have excellent communication and collaboration skills You are degree … educated in Computer Science or similar technical or numerate discipline What's in it for you: As a Fidessa Developer (Java Spring Boot API) you will receive a competitive Salary to £135k Bonus Pension One day work from home per week Continuous training and career progression opportunities Apply now to find out more about this Fidessa Developer (Java Spring Boot More ❯

currently going through a period of exponential growth and are enjoying record profits The business is actively expanding as there is additional headcount for a number trade platform specialist Java Development with a focus on either/or Quantitative Development or low-latency performance optimization. You will be working on greenfield projects to build out and enhance their low latency … alerting, and fault tolerance SKILL/EXPERIENCE REQUIRED: Expertise in market-making or algorithmic trading, including deep understanding of order book dynamics and pricing techniques Proven track record in Java programming, specifically in building fast, low-latency trading systems Strong familiarity with market data and order execution protocols (e.g. FIX, binary, or custom APIs) Hands-on experience with JVM tuning More ❯

Graduate/Junior Developer, Python, Linux, C#, Java - London (Teck stack: Graduate/Junior Developer, Python, Linux, C#, Java, .NET 9, C#, J2EE, Agile, TDD, BDD, Graduate/Junior Developer) Since 2006 our client's revolutionary marketing software platform has been helping businesses all over the world to attract, engage, and delight customers by delivering inbound experiences that are relevant … helpful, and personalized. Having recently launched in the UK, they looking to hire Graduate/Junior Developer (Python, Linux, C#, Java)) to become a part of their ever-growing family. They believe that individual developers are in the best position to make decisions about what should be created, and how it should be built. Within their setup those decisions are … roles would be suitable Graduate/Junior Developer who have recently graduated from university and have a basic understanding of any of the following technologies: Python, Linux, C# or Java; which might have been acquired as part of your degree course or through a placement year in industry. At the center of our client's culture is freedom and openness More ❯

Engineer to join on a contract basis, contributing to the design and development of scalable web applications. You will work across the full stack, with a focus on React, Java, TypeScript, and Spring , helping deliver high-quality, maintainable, and performant software in a collaborative environment. Key Responsibilities Design, develop, and maintain scalable web applications and APIs. Work across the stack … with React (front end) and Java/Spring (back end) . Write clean, maintainable, and testable code using TypeScript and modern development practices. Collaborate with cross-functional teams including product, design, and QA. Contribute to technical discussions, architecture decisions, and best practices. Troubleshoot, debug, and optimise applications for maximum performance. Key Skills & Experience Strong commercial experience with React, TypeScript, Java More ❯