I've contributed end-to-end to Rapidor V1 and V2, ONDC PlaceOrder, and Crux Payment Service at Acelrtech Labs using Django, FastAPI, PostgreSQL, Redis, Kafka, Celery, and AWS.
I reduced SAP bulk-import API latency by 99%, improved PostgreSQL query performance from 1200 ms to 300 ms, and redesigned parallel cache updates to eliminate recurring P1 incidents.

