Senior Software Development Engineer (SDE3) – Java/API/Backend Location: Welwyn Garden City, UK (Hybrid, 2–3 days onsite) Contract: 6 months, with possible extension Overview This role supports the development of a next-generation, scalable, and resilient Fulfilment Platform powering both manual and robotic warehouse operations across multiple product categories. You will join a global Java-focused engineering team working with modern microservices, event-driven architecture, cloud technologies, and a strong DevOps culture. Key Responsibilities * Design & Development: Architect, build, and enhance high-performance Java-based backend applications for new fulfilment capabilities. * System Optimisation: Improve scalability, efficiency, and reliability of mission-critical systems in collaboration with cross-functional teams. * API & Microservices Integration: Develop robust APIs and microservices integrating with enterprise and third-party systems. * Code Quality: Deliver clean, maintainable, well-documented, and test-driven code aligned with industry standards. * Troubleshooting: Diagnose and resolve complex production issues to ensure uninterrupted operational performance. * Mentorship: Support and guide junior engineers while promoting best practices and continuous improvement. * Innovation & Collaboration: Work closely with hardware, data ...