> Markdown version of [/jobs/ext/2259895-back-end-developer](https://www.wearedevelopers.com/jobs/ext/2259895-back-end-developer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Back End Developer - **Company:** Atrium (EMEA) - **Location:** London, UK - **Experience:** Expert - **Salary:** £175,531.0 - **Contract:** Temporary contract - **Skills:** Java (Programming Language), JIRA, Unit Testing, Code Reuse, Code Review, Continuous Integration, Java Platform Enterprise Edition (J2EE), Design of User Interfaces, Hypertext Transfer Protocols (HTTP), Junit, MongoDB, NoSQL, Scrum Methodology, Blockchain, Systems Integration, TypeScript, Spring-boot, Backend, Git, Spring Data, Build Management, Hyperledger, AngularJS, Ethereum, Apache Kafka, Front End Software Development, Restful APIs, Spring Batch, Microservices - **Published:** August 26, 2026 - **Apply:** https://www.collegerecruiter.com/job/2815179120-back-end-developer ## About the Role YOU MUST HAVE BLOCKCHAIN EXPERIENCE - Smart contracts / Ethereum and etc., * Strong experience with Core and Advanced Java, including J2EE * Proven experience building and deploying microservices using Spring Boot, Spring Batch, and Spring Data * Solid understanding of REST API principles and HTTP protocols * Experience with NoSQL databases such as CosmosDB or MongoDB * Hands-on experience with Git, CI/CD pipelines, and Agile delivery environments * Familiarity with JIRA, JUnit, and Apache Kafka * Strong communication skills and experience working in collaborative, cross-functional teams ## Description Senior Back-End Developer (Java Microservices) Duration: 12 months Location: London, UK Working hours: Full time Onsite requirements: 4 days in the office Day Rate / Hourly Rate: £84.39 per hour PAYE (inclusive of holiday) OR £100 per hour Umbrella YOU MUST HAVE BLOCKCHAIN EXPERIENCE - Smart contracts / Ethereum and etc. Right to work: Applicants must have the legal right to work in the UK. Sponsorship is not available for this role. This opportunity is with one of Atrium Global's clients operating within the financial services and lending technology sector. Job Overview As a Senior Back-End Developer, you will play a key role in designing, developing, and maintaining the back-end of a complex microservices architecture. Your expertise in Java-based microservices will be critical in delivering a scalable, high-performance, next-generation loans processing application. Responsibilities * Collaborate closely with cross-functional teams including Product Owners, Business Analysts, Scrum Masters, and front-end and back-end developers * Design, develop, and implement microservices using Java and Spring Boot, ensuring modular, testable, and reusable code * Contribute to the development of responsive and intuitive user interfaces using Angular and TypeScript where required * Ensure seamless integration and communication between front-end and back-end systems * Design and build RESTful APIs and gRPC services for internal and external system integration * Conduct regular code reviews, unit testing, and support CI pipelines to maintain high code quality * Produce and present high-level technical designs and proposals to stakeholders * Support delivery flow by identifying blockers, contributing to technical decision-making, and assisting with backlog refinement * Promote collaboration and knowledge sharing across pods and teams * Mentor and support team members, helping resolve technical challenges and maintain alignment with delivery goals Requirements * Strong experience with Core and Advanced Java, including J2EE * Proven experience building and deploying microservices using Spring Boot, Spring Batch, and Spring Data * Solid understanding of REST API principles and HTTP protocols * Experience with NoSQL databases such as CosmosDB or MongoDB * Hands-on experience with Git, CI/CD pipelines, and Agile delivery environments * Familiarity with JIRA, JUnit, and Apache Kafka * Strong communication skills and experience working in collaborative, cross-functional teams NICE TO HAVE * Experience with Ethereum, Hyperledger Besu, or other EVM-based platforms ## Related Videos - [Meet Your New BFF: Backend to Frontend without the Duct Tape](https://www.wearedevelopers.com/videos/682-meet-your-new-bff-backend-to-frontend-without-the-duct-tape) - [How Unit Testing Saved My Career](https://www.wearedevelopers.com/videos/1642-how-unit-testing-saved-my-career) - [Improving quality with Agentic AI with Rovo Dev and Xray](https://www.wearedevelopers.com/videos/2005-improving-quality-with-agentic-ai-with-rovo-dev-and-xray) - [How a Small Team Shrank a Microsoft Monorepo by 94%](https://www.wearedevelopers.com/videos/1236-how-a-small-team-shrank-a-microsoft-monorepo-by-94) - [​Road to Web3](https://www.wearedevelopers.com/videos/584-road-to-web3) - [From boy scouting to redrawing the landscape](https://www.wearedevelopers.com/videos/1140-from-boy-scouting-to-redrawing-the-landscape) ## Related Articles - [7 tips on how to become a blockchain developer](https://www.wearedevelopers.com/magazine/53-7-tips-on-how-to-become-a-blockchain-developer) - [What’s the Difference Between Frontend and Backend Development?](https://www.wearedevelopers.com/magazine/240-what-s-the-difference-between-frontend-and-backend-development) - [Find a Developer Job: 12 Best Job Sites For Developers](https://www.wearedevelopers.com/magazine/165-find-a-developer-job-12-best-job-sites-for-developers) - [Top-Paying Tech Jobs (with Salaries)](https://www.wearedevelopers.com/magazine/372-top-paying-tech-jobs-with-salaries) - [Why Blockchain? A Developer’s Perspective](https://www.wearedevelopers.com/magazine/616-why-blockchain-a-developer-s-perspective) - [20 Essential Tools For Backend Development](https://www.wearedevelopers.com/magazine/218-20-essential-tools-for-backend-development)