Job Title: Senior Java Developer

Location: Manchester / Hybrid

Contract Length: 6 months

Day Rate: £600 per day

Industry: Global eCommerce

About the Role

I am seeking a Senior Java Developer contractor to join a global eCommerce business. As a Senior Java Developer, you will play a key role in building scalable backend systems that support millions of users worldwide, driving performance, reliability, and maintainability. You’ll be working in a fast-paced, agile environment, collaborating with cross-functional teams to deliver high-quality software that directly impacts customer experience.

Key Responsibilities

• Design, develop, and maintain scalable Java-based backend systems
• Collaborate with product owners, architects, and fellow engineers to deliver new features and improve system performance
• Write clean, maintainable, and testable code, following best practices
• Participate in code reviews and mentor junior developers
• Contribute to architectural decisions and technical design discussions
• Integrate with third-party APIs, payment gateways, and microservices
• Ensure the reliability, uptime, and performance of production systems

Tech Stack

• Languages: Java, Spring Boot
• Architecture: Microservices, REST APIs, Event-driven architecture
• Databases: Cockroach DB
• Cloud: AWS (EC2, Lambda, S3, ECS), Docker, Kubernetes
• CI/CD: Jenkins, GitLab CI/CD, Terraform

What We’re Looking For

• 7+ years of Java development experience in high-scale environments
• Strong experience with Spring Boot and building RESTful APIs
• Deep understanding of microservices and distributed systems
• Comfortable working in CI/CD and cloud-native environments (ideally AWS)
• Experience with eCommerce platforms or large-scale transactional systems is a big plus