42 java developer jobs found in London

About Synechron: Synechron is a leading digital transformation consulting firm dedicated to delivering innovative technology solutions within banking, financial services, and insurance. We thrive on engineering excellence, collaboration, and a passion for cutting-edge technologies. Job Location: London (Hybrid - 3 days in the office) About the role: We are seeking a highly experienced Senior Java Developer with over 10 years of hands-on Java development experience and extensive exposure to AI/ML-driven systems . The ideal candidate will design, build, and scale enterprise-grade applications while integrating modern AI capabilities such as machine learning models, generative AI, and intelligent automation into Back End systems. Key Responsibilities Design, develop, and maintain high-performance, scalable Java applications using modern frameworks. Architect and implement AI-enabled solutions , integrating ML/AI models into Java-based platforms....

About Synechron: Synechron is a leading digital transformation consulting firm dedicated to delivering innovative technology solutions within banking, financial services, and insurance. We thrive on engineering excellence, collaboration, and a passion for cutting-edge technologies. Job Location: London (Hybrid - 3 days in the office) About the role: We are seeking a highly experienced Senior Java Developer with over 10 years of hands-on Java development experience and extensive exposure to AI/ML-driven systems . The ideal candidate will design, build, and scale enterprise-grade applications while integrating modern AI capabilities such as machine learning models, generative AI, and intelligent automation into Back End systems. Key Responsibilities Design, develop, and maintain high-performance, scalable Java applications using modern frameworks. Architect and implement AI-enabled solutions , integrating ML/AI models into Java-based platforms....

About Synechron: Synechron is a leading digital transformation consulting firm dedicated to delivering innovative technology solutions within banking, financial services, and insurance. We thrive on engineering excellence, collaboration, and a passion for cutting-edge technologies. Job Location: London (Hybrid - 3 days in the office) About the role: We are seeking a highly experienced Senior Java Developer with over 10 years of hands-on Java development experience and extensive exposure to AI/ML-driven systems . The ideal candidate will design, build, and scale enterprise-grade applications while integrating modern AI capabilities such as machine learning models, generative AI, and intelligent automation into Back End systems. Key Responsibilities Design, develop, and maintain high-performance, scalable Java applications using modern frameworks. Architect and implement AI-enabled solutions , integrating ML/AI models into Java-based platforms....

We are looking for Senior Java Developers to join on a contract basis (Inside IR35) . The ideal candidate will have experience building scalable microservices, working with event-driven systems, and deploying applications using containerized and cloud technologies. You will contribute to developing reliable backend services and help modernize legacy systems into cloud-ready architectures. Key Skills & Responsibilities Strong experience with Java (latest versions) and Spring Boot Experience designing and developing Microservices architectures Solid understanding of backend design patterns and best practices Experience working with SQL databases, particularly PostgreSQL Knowledge of Object-Oriented programming principles (OCP) Experience with event streaming platforms such as Kafka or RabbitMQ Hands-on experience with Docker and Kubernetes Experience working with AWS or other cloud platforms Ability to build scalable, reliable, and...

We are looking for Senior Java Developers to join on a contract basis (Inside IR35) . The ideal candidate will have experience building scalable microservices, working with event-driven systems, and deploying applications using containerized and cloud technologies. You will contribute to developing reliable backend services and help modernize legacy systems into cloud-ready architectures. Key Skills & Responsibilities Strong experience with Java (latest versions) and Spring Boot Experience designing and developing Microservices architectures Solid understanding of backend design patterns and best practices Experience working with SQL databases, particularly PostgreSQL Knowledge of Object-Oriented programming principles (OCP) Experience with event streaming platforms such as Kafka or RabbitMQ Hands-on experience with Docker and Kubernetes Experience working with AWS or other cloud platforms Ability to build scalable, reliable, and...

We are looking for Senior Java Developers to join on a contract basis (Inside IR35) . The ideal candidate will have experience building scalable microservices, working with event-driven systems, and deploying applications using containerized and cloud technologies. You will contribute to developing reliable backend services and help modernize legacy systems into cloud-ready architectures. Key Skills & Responsibilities Strong experience with Java (latest versions) and Spring Boot Experience designing and developing Microservices architectures Solid understanding of backend design patterns and best practices Experience working with SQL databases, particularly PostgreSQL Knowledge of Object-Oriented programming principles (OCP) Experience with event streaming platforms such as Kafka or RabbitMQ Hands-on experience with Docker and Kubernetes Experience working with AWS or other cloud platforms Ability to build scalable, reliable, and...

Job Title: Full Stack Developer (Java, Spring, React) - contract Location: London Hybrid. Travel to the London office on 3 days a week Duration: 11 months Contract Start Date: ASAP *note client onboarding takes 6 weeks from offer Day Rate: Competitive (Inside IR35)   Deloitte Working with the Deloitte Associate (Contractor) Programme means we can offer you the opportunity to work on a variation of industry and client related projects. Our aim is to retain the best talent and so when your project end date nears our team of Talent Community Advisors will be working with you to look at alternative projects within the firm that suit your experience should you wish to continue with Deloitte.   The Role We are looking for an experienced Full Stack Developers to work in the Technology and Transformation Team at Deloitte. You will work with one of our global financial services clients. This position requires an...

About Synechron: Synechron is a leading digital transformation consulting firm dedicated to delivering innovative technology solutions within banking, financial services, and insurance. We thrive on engineering excellence, collaboration, and a passion for cutting-edge technologies. Job Location: London (Hybrid - 3 days in the office) About the role: We are seeking a highly experienced (10+ years ) Java Full-Stack Lead Developer with strong system architecture expertise to lead the design and delivery of scalable, distributed systems. This is a hands-on leadership role where you will define architecture, guide a globally distributed engineering team, and ensure high standards in both Back End and Front End development. Key Responsibilities Lead the architecture design of complex, scalable and high-availability systems Make critical decisions on system design, tech stack, and trade-offs Drive end-to-end development across Back End and Front End...

Job Summary We are seeking an experienced Java Back-end Developer specialised in cloud platforms such as Azure and AWS to join our dynamic development team. The successful candidate will be responsible for designing, developing, and maintaining scalable back-end services and APIs, ensuring seamless integration with front-end applications and third-party systems. This role offers an exciting opportunity to work on innovative projects within a collaborative environment, contributing to the realisation of cutting-edge solutions that meet business needs. Responsibilities Liaise with fellow developers Designing and implementing microservices which use the spring boot framework. Working in compliance with the full Software Development Life Cycle. Connecting microservices to interact with databases. Understanding of how streaming technologies work such as Kafka. Build Azure/AWS pipelines Identifying and finding solutions to bugs. Ensure you've...

Job Title: Junior Full Stack Java Web Developer (Hybrid Contractor) About ReachX ReachX is at the forefront of the digitalization of financial services and is a leader in the future of work. ReachX services are specifically designed for Institutional Investors, Corporates, and Professional Services Firms. Our tech platform will enable you to access more than 4000 vetted Advisors and connect with more than 500 Institutional Investors active in private markets. Our mission is to make financial services more efficient and generate unique growth opportunities for our Clients, Partners, and Advisors. Examples of our Institutional Investors include Private Equity, VC, and Family offices predominantly based across the UK and Europe, and projects are typically paid on a day rate or through a success or transaction fee. Interim M&A Advisors might also have a background as: Corporate Finance Advisors CFOs and Finance Directors Investment Banking...

OneAPPS Consulting (www.oneapps.com) is a Technology consulting firm based out of London and offices across Europe. We are working on various projects involving diverse, multicultural teams with clients across the Europe. We are an invaluable partner and our teams have collaborated to support the growth of our clients. With more than 7 locations worldwide we help our clients to deliver their projects smoothly. We look forward to getting to know you and working with you. Fullstack Developer - Java/React.JS Location: Burgess Hill Work Mode: Hybrid: 3 Days/week from office Inside IR35 Contract Required technical experience: Java, Spring boot, Microservices, RestAPI, React, Redux, JS, HTML, CSS, CICD Required Experience/Skillset: -Development experience in developing enterprise-grade applications involving both front end (UI) and back end (server side). -Strong programming skills in Java, Data structures and algorithms, Web services, REST APIs, JSON, XML etc....

Are you a highly experienced front-end engineer passionate about building robust, high-performance systems? Do you want to be part of a global organisation that ensures the stability and efficiency of the world’s financial ecosystem? Synechron is looking for a talented Front-End Lead to spearhead our front-end transformation for post-trade services. This is a unique opportunity to work on cutting-edge technology within a prestigious, systemically important infrastructure provider. As the Lead Front-End Developer, you will be instrumental in rewriting and refactoring existing UI applications like Margin Manager and Collateral Manager using our strategic workspace UI components. You will design and build a unified portal to provide seamless access across various internal systems, ensuring a cohesive look and feel. Your expertise will help champion clean, maintainable code and uphold strict resiliency standards within an AWS environment. You will collaborate closely with...

  Job Title: Senior Full Stack Developer (contract) Location: London Hybrid. Travel to the London office 3 days a week Duration: 11 months Contract Start Date: ASAP *note client onboarding takes 6 weeks from offer Day Rate: Competitive (Inside IR35)   Deloitte Working with the Deloitte Associate (Contractor) Programme means we can offer you the opportunity to work on a variation of industry and client related projects. Our aim is to retain the best talent and so when your project end date nears our team of Talent Community Advisors will be working with you to look at alternative projects within the firm that suit your experience should you wish to continue with Deloitte.   The Role We are looking for Senior Full Stack Developers to work in the Technology and Transformation Team at Deloitte. You will work with one of our global financial services clients. This position...

  Job Title: Full Stack Developer (contract) Location: London Hybrid. Travel to the London office on 3 days a week Duration: 11 months Contract Start Date: ASAP *note client onboarding takes 6 weeks from offer Day Rate: Competitive (Inside IR35)   Deloitte Working with the Deloitte Associate (Contractor) Programme means we can offer you the opportunity to work on a variation of industry and client related projects. Our aim is to retain the best talent and so when your project end date nears our team of Talent Community Advisors will be working with you to look at alternative projects within the firm that suit your experience should you wish to continue with Deloitte.   The Role We are looking for an experienced Full Stack Developers to work in the Technology and Transformation Team at Deloitte. You will work with one of our global financial services clients. This position...

Fliprly is the world’s first and only mobile app dedicated to buying and selling domains, websites, mobile apps, and other digital assets. Our iOS app and web platform are live, and we’re now ready to expand our reach with a robust Android app. Join us on this exciting journey to revolutionize the digital asset marketplace! What We’re Looking For We’re seeking a skilled Android Developer (freelancer or agency) to build the Android version of Fliprly from scratch. You’ll work closely with our existing team and leverage our iOS/web apps as references for functionality and design consistency. Responsibilities Build a high-performance Android app using Java. Translate our iOS design and features into the Android ecosystem. Integrate APIs and backend services (already available). Ensure a smooth, responsive, and bug-free user experience. Requirements Proven experience building Android apps (at least 4 solid live...

  London, England, United Kingdom (Hybrid)   Contract (1 year)   Published 19 days ago Data Java artificial intelligence Python GCP Machine Learning Azure microservices Job Title: Data Scientist Job Location: Canary Wharf (Hybrid- 4 days in office, 1 from home) Contract Length: Until 31/12/2026 Industry: Oil and Energy, Tech Working Hours: 8 per day/40 per week   Role Overview: Design, develop, and maintain production-grade AI applications and services using modern software engineering practices (CI/CD, testing, observability, cloud-native design). Define and implement foundational platforms and tools (e.g., conversational bots, AI-powered search, unstructured data processing, GenBI) that are reusable and scalable across the enterprise. Participate in cross functional team...

  Job Title: Senior Full Stack Developer (contract) Location: London Hybrid. Travel to the London office 3 days a week Duration: 11 months Contract Start Date: ASAP *note client onboarding takes 6 weeks from offer Day Rate: Competitive (Inside IR35)   Deloitte Working with the Deloitte Associate (Contractor) Programme means we can offer you the opportunity to work on a variation of industry and client related projects. Our aim is to retain the best talent and so when your project end date nears our team of Talent Community Advisors will be working with you to look at alternative projects within the firm that suit your experience should you wish to continue with Deloitte.   The Role We are looking for Senior Full Stack Developers to work in the Technology and Transformation Team at Deloitte. You will work with one of our global financial services clients. This position...

  Job Title: Full Stack Developer (contract) Location: London Hybrid. Travel to the London office on 3 days a week Duration: 11 months Contract Start Date: ASAP *note client onboarding takes 6 weeks from offer Day Rate: Competitive (Inside IR35)   Deloitte Working with the Deloitte Associate (Contractor) Programme means we can offer you the opportunity to work on a variation of industry and client related projects. Our aim is to retain the best talent and so when your project end date nears our team of Talent Community Advisors will be working with you to look at alternative projects within the firm that suit your experience should you wish to continue with Deloitte.   The Role We are looking for an experienced Full Stack Developers to work in the Technology and Transformation Team at Deloitte. You will work with one of our global financial services clients. This position...

About Fliprly Fliprly is the world’s first and only mobile app dedicated to buying and selling domains, websites, mobile apps, and other digital assets. Our iOS app and web platform are live, and we’re now ready to expand our reach with a robust Android app. Join us on this exciting journey to revolutionize the digital asset marketplace! What We’re Looking For We’re seeking a skilled Android Developer (freelancer or agency) to build the Android version of Fliprly from scratch. You’ll work closely with our existing team and leverage our iOS/web apps as references for functionality and design consistency. Responsibilities Build a high-performance Android app using Java. Translate our iOS design and features into the Android ecosystem. Integrate APIs and backend services (already available). Ensure a smooth, responsive, and bug-free user experience. Requirements Proven experience building Android apps (at...

Job Title: Data Scientist Job Location: Canary Wharf (Hybrid- 4 days in office, 1 from home) Contract Length: Until 31/12/2026 Industry: Oil and Energy, Tech Working Hours: 8 per day/40 per week   Role Overview: Design, develop, and maintain production-grade AI applications and services using modern software engineering practices (CI/CD, testing, observability, cloud-native design). Define and implement foundational platforms and tools (e.g., conversational bots, AI-powered search, unstructured data processing, GenBI) that are reusable and scalable across the enterprise. Participate in cross functional team initiatives-embedded projects with business stakeholders-to rapidly build and deploy AI solutions that solve high-priority business problems. Evaluate and integrate existing AI tools, frameworks, and APIs (e.g., LLMs, vector DBs, retrieval-augmented generation, AI agents) into robust applications....