Job Summary We are seeking a highly experienced Senior Java AWS API/Web Services Developer to design, build, and optimize high-performance, scalable applications handling very high transaction volumes (3000+ TPS). The ideal candidate will bring deep expertise in multithreading, performance tuning, and distributed systems, with prior experience in eCommerce platforms, payment gateways, or other high-throughput environments. This role requires an end-to-end product mindset, covering design, develo