• Worked on the ONDC (Open Network for Digital Commerce) E-commerce platform at Paytm.• Reduced cart page errors from 3% to 0.75% by implementing preemptive checks on sellers and closingstores dynamically based on error rates.• Implemented a daily cron job that disables approximately 5% of merchants which are inactive or stale from thecatalog, ensuring a fresh and relevant shopping experience for users.• Implemented ONDC ingestion flow to onboard or update the catalogs of over 200,000 merchants daily.• Implemented JSON Schema validation to identify and process requests that don’t adhere to the network’sprotocol.• Implemented a Merchant blacklisting feature to gain greater control over the ingestion process and enhanceuser experience.• Improved customer service by implementing ONDC’s Issue and Grievance Management Protocol. Reducedresolution time from 12 hours to under 2 hours.• Enhanced deployment efficiency by 15% using Spring Cloud Config Server, ensuring zero downtime for 10+microservices.• Developed Merchant Visibility API to streamline debugging and provide a unified view of merchant visibilitystatus across Paytm. This tool increased efficiency by over 70% and supported various teams likeBusiness/Growth/Product/Dev in their work.• Developed Ondc Confirm API and Consumer(Kafka) layer for ONDC-Seller App.• Developed Payouts Service for ONDC-Seller app, a crucial component for calculating transaction charges andtaxes.• Achieved 90%+ code coverage for Unit Test cases by using AI tools to enhance development efficiency.