Aug 2024 – Jul 2025 · 11 mos · Gurugram, Haryana, India · Hybrid

• Led the migration of 3 lakh merchants from the legacy payment gateway Checkout to the new system SPG, designing and implementing the complete backend solution. Engineered a safe and scalable traffic migration mechanism to prevent duplicate transactions during merchant cutover. Acted as the sole on-call engineer for Checkout, ensuring operational stability and timely incident resolution during the migration. Automated merchant validation and gap detection within the SPG codebase, minimizing manual checks and post-migration issues. Delivered targeted bug fixes for merchants post-migration, improving transaction success rate and system reliability.

Jul 2023 – Jul 2024 · 1 yr · Noida, Uttar Pradesh, India · Remote

• Maintained backend systems using Spring Boot for the Acquirer team for NCMC cards and PG integration, handling 2 lakh API requests/day. Automated dynamic property configuration through DB for the NCMC dashboard, removing code-level changes. Improved system efficiency by removing PG library dependencies and implementing customized solutions to reduce latency. Documented APIs via Swagger, enabling smooth QA/staging testing. Increased code coverage to 90% with JUnit. Monitored APIs via Grafana/Kibana; integrated metric exports into dashboards. Automated CSV-based report generation for NCMC dashboard.

Jan 2023 – Jun 2023 · 5 mos · Noida, Uttar Pradesh, India · Remote

• Improved code quality by adhering to SonarQube principles. Delivered audit-related changes to ensure stable, compliant systems.