Ramakrishnan M

Engineered and maintained scalable payment infrastructure, migrating legacy Hapi.js-based systems to a new SparrowPay microservice built with NestJS, TypeScript, and PostgreSQL.

Led the integration of advanced Stripe payment flows, ensuring compliance with global financial regulations, including the RBI (INR)5000 recurring charge limit.

Designed and delivered key billing system features, including automated card expiration notifications and subscription renewal mechanisms, enhancing operational efficiency.

Developed a reusable Wallet system, starting with WhatsApp Wallet integration, enabling extensible service integrations and expanding payment options.

Implemented hierarchical Sub-account support, enabling parent-child account relationships and aggregated usage-based billing for complex enterprise structures.

Built scalable backend systems and REST APIs for a Web3 learning platform, supporting robust data exchange and user functionality.

Enhanced frontend user experience using ReactJS and Tailwind CSS, significantly improving platform usability and responsiveness.

Implemented comprehensive course progress tracking features and established backend testing infrastructure, ensuring data integrity and reliability.

Designed and implemented optimized Python-based seat allocation algorithms, efficiently processing 200,000 engineering admissions for TNEA counseling.

Applied basic data analytics using Python libraries (Pandas and NumPy) to improve decision-making and enhance allocation efficiency.

Automated category-based reservation logic, ensuring fairness and accelerating processing across 539 engineering colleges.