Software Developer
Cogent Web Services · March 2026 - October 2026
- Developed and hardened payment and lab-booking workflows using Razorpay, PostgreSQL, Redis, and BullMQ, focusing on transaction integrity, idempotency, and reliable webhook processing.- Contributed to server-driven UI (SDUI) infrastructure, implementing configuration validation, versioned snapshots, rollback support, and client-side fallback mechanisms.- Implemented healthcare membership and checkout logic, including subscription benefits, plan-specific quotas, pricing validation, fee waivers, and GST calculations.- Performed API performance testing using k6, identified database scalability bottlenecks, and evaluated composite-index optimizations to improve booking-list API throughput.- Built and executed automated integration and pricing validation tests to identify concurrency issues, prevent duplicate processing, and improve system reliability.