> Markdown version of [/jobs/ext/2250143-back-end-developer](https://www.wearedevelopers.com/jobs/ext/2250143-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:** Lorien - **Location:** Leeds, UK - **Experience:** Expert - **Contract:** Temporary contract - **Skills:** Java (Programming Language), Agile Methodology, Amazon Web Services, Automation of Tests, Software Quality, Software Debugging, DevOps, Fault Tolerance, Hardware Interface Design, Spring Framework, Python (Programming Language), Enterprise Messaging Systems, NoSQL, Open Source Technology, RabbitMQ, Scala (Programming Language), SQL Databases, TypeScript, Technical Debt, Backend, Build Management, Information Technology, Apache Kafka, Graphql, Functional Programming, Docker, Service Stack, Microservices - **Published:** August 26, 2026 - **Apply:** https://www.collegerecruiter.com/job/2815191414-back-end-developer ## About the Role * 5+ years of professional Java development experience * Deep expertise in Spring Framework and microservices architecture * Proven ability to mentor and develop engineering talent * Strong background in messaging systems (Kafka, RabbitMQ) * Proficiency with AWS, Docker, SQL/NoSQL, and automated testing * Experience in Agile environments with a DevOps mindset Mindset & Skills * Ownership mentality with a focus on delivering customer value * Strategic thinker with a bias for action and simplicity * Passionate about learning, teaching, and raising the bar * Comfortable working flexibly to support US-based teams * Strong communicator and effective collaborator across disciplines, * Degree in Computer Science or related field * Experience with Python, TypeScript, Scala, or GraphQL * Familiarity with advanced AWS services and hardware interfaces #J-18808-Ljbffr ## Description Location: Leeds ( 1- day onsite per week) Duration: 6 Months Description About the Role Join our US Product Development team, where we build innovative retail systems for Sportsbooks and hotel check-in kiosks across the US. As a senior developer, you'll lead backend development, mentor engineers, and shape the future of our technology stack. We're looking for a collaborative, results-driven professional who values simplicity, ownership, and continuous learning. Key Responsibilities Technical Leadership * Design and build Java microservices using modern Java and Spring Framework * Architect scalable, fault-tolerant, high-performance systems * Lead initiatives to improve code quality, reduce technical debt, and enhance CI/CD pipelines * Promote functional programming and internal open-source practices * Mentor junior and mid-level developers, fostering a culture of growth and excellence * Facilitate team debugging and problem-solving sessions Strategic Impact * Influence architecture and technical direction across the team * Write clean, maintainable code that supports long-term scalability and team contributions * Define and uphold development standards and best practices * Lead and participate in production support, including on-call rotation * Work closely with QA to ensure high-quality software delivery * Contribute to a culture of continuous improvement and innovation * Collaborate across teams and time zones to deliver impactful solutions * Help drive the evolution of next-generation sports betting technology What You'll Bring Experience * 5+ years of professional Java development experience * Deep expertise in Spring Framework and microservices architecture * Proven ability to mentor and develop engineering talent * Strong background in messaging systems (Kafka, RabbitMQ) * Proficiency with AWS, Docker, SQL/NoSQL, and automated testing * Experience in Agile environments with a DevOps mindset Mindset & Skills * Ownership mentality with a focus on delivering customer value * Strategic thinker with a bias for action and simplicity * Passionate about learning, teaching, and raising the bar * Comfortable working flexibly to support US-based teams * Strong communicator and effective collaborator across disciplines Bonus Points * Degree in Computer Science or related field * Experience with Python, TypeScript, Scala, or GraphQL * Familiarity with advanced AWS services and hardware interfaces ## Related Videos - [Leveraging Real time data in FSIs](https://www.wearedevelopers.com/videos/806-leveraging-real-time-data-in-fsis) - [Docker Compose: Rediscovered](https://www.wearedevelopers.com/videos/1978-docker-compose-rediscovered) - [From DevOps to Scaled DevOps: How We’re Rebuilding Continuous Delivery as a Platform](https://www.wearedevelopers.com/videos/100018-from-devops-to-scaled-devops-how-we-re-rebuilding-continuous-delivery-as-a-platform) - [Coffee with developers - Brian Morrison](https://www.wearedevelopers.com/videos/902-coffee-with-developers-brian-morrison) - [NoSQL Data Modeling for Front-end Developers](https://www.wearedevelopers.com/videos/297-nosql-data-modeling-for-front-end-developers) - [The user in the eye of the Cargo1492 storm](https://www.wearedevelopers.com/videos/96-the-user-in-the-eye-of-the-cargo1492-storm) ## Related Articles - [The 7 Most Popular Backend Frameworks for Developers](https://www.wearedevelopers.com/magazine/403-the-7-most-popular-backend-frameworks-for-developers) - [Software Engineer Salary London](https://www.wearedevelopers.com/magazine/252-software-engineer-salary-london) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [20 Essential Tools For Backend Development](https://www.wearedevelopers.com/magazine/218-20-essential-tools-for-backend-development) - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline)