Senior Java Backend Engineer

Category: Technology Location: We're looking for a Senior Backend Engineer with deep expertise in Java to build resilient, high-throughput, low-latency distributed systems capable of handling tens of thousands of concurrent requests. You'll own end-to-end supplier integrations, working directly with external suppliers to implement REST API and webhooks integrations.The role requires strong product intuition and a deep understanding of the full passenger lifecycle, from bookings and order creation to modifications and cancellations, as well as how these workflows operate reliably across a multi-tenant platform. Own the supplier integrations process from gathering requirements and API design through production deployment and ongoing partner relationships. Integrate with supplier APIs (RESTful/webhooks) by implementing secure, reliable connections that handle authentication, rate limiting, retries, and complex error scenarios. Build event-driven microservices that process high-volume transactions with strict latency requirements across a multi-tenant architecture. Deploy and operate production services on AWS with monitoring and observability, maintaining 99.99% uptime SLA. Requirements 5+ years backend engineering experience with ownership of production systems serving at least 10,000+ daily active users. Ability to gather requirements from suppliers, analyse integration specifications, and communicate effectively with key stakeholders throughout the integration lifecycle. Expe