Apr 2025 – Present · 1 yr 2 mos

Jul 2024 – Apr 2025 · 9 mos

• ● Continued working on the ever-increasing scale of UPI ecosystem.
• ● Had pivotal contribution in the end-to-end migration of infrastructure and participated in overhaul of UPI Architecture in just 45 days after embargo on Paytm Payments Bank by building new integrations with multiple sponsor banks, along with performing live migration of running applications without
• downtime.
• ● Created IaC templates from scratch for non-prod environments. This facilitated a one-click process for deploying new testing environments allowing the team to increase their velocity
• several-fold.
• ● Created an inhouse tool that involved a custom implementation of multiplexed NAT Traversal through CG-NAT to enable developers to perform integration testing of inward webhooks from 3rd party applications to developer workstations - massively reducing the time taken for debugging and overall task TATs.
• ● Coordinated delegation of numerous Infrastructure deployments by bridging niche developer requirements to devops actionables.
• ● Performed resolution of several issues relating to Direct Connect, BGP Propagation, Site2Site VPNs, and PrivateLink endpoints with devops and networking teams to facilitate in the migration of data out of Paytm Payments Bank while following strict regulatory requirements.

Jul 2022 – Jun 2024 · 1 yr 11 mos

• ● Worked on core UPI microservices, handling over 120M transactions worth INR 38 Billion daily.
• ● Overhauled reporting mechanisms for timely settlement of merchant accounts.
• ● Worked on wallet interoperability project to enable use of prepaid payment instruments on UPI rails.
• ● Worked on decoupling payment aggregator code to spin off Paytm’s UPI backend as a SaaS offering.
• ● Worked on overhaul of system design to facilitate 2x transaction scale and expedition of time to market for new changes.
• ● Created a DSL-based reconciliation system that discovered financial loss of over 10 Million INR and established a framework for quick discovery and preventive action.
• ● Worked on establishing a cloud presence on AWS, creating an on-premise+cloud hybrid to facilitate impromptu scaling during periods of high traffic, while overcoming higher RTTs of the hybrid architecture.
• ● Single-handedly overhauled local development process by creating production-replicating stubs of all 3rd party APIs involved in a transaction. Facilitating an 80% reduction in development time of new APIs.
• ● Discovered and reported a critical security vulnerability in the protocol used for communicating with the Core Banking System (CBS) Software.

Jan 2022 – Jun 2022 · 5 mos