Tarun Vamsi Pusarla

Hatio Innovations (a BillDesk company)

• Building an escrow ledger system from the ground up for one of India's largest payment gateways, processing 10–15 million transactions daily across PG, BMS, and CardPay systems, spanning multiple lines of business.
• Designed and developed backend services in Java/Spring Boot with REST APIs to support high-throughput transaction processing, ledger accounting, and reconciliation workflows in a regulated fintech environment.
• Built and optimized Spring Batch pipelines for large-scale financial data processing, handling 250+ Cr transaction records with significant gains in throughput and reliability.
• Worked extensively with Oracle and PostgreSQL - writing and tuning complex SQL, stored procedures, and triggers to support financial reporting, audits, and compliance requirements.
• Designed a scalable multi-tier architecture for financial workflows, maintaining clean separation between frontend, backend services, and data layers.
• Benchmarked and load-tested systems under production-scale volumes (millions of transactions), driving measurable improvements in scalability and release stability.
• Set up and automated CI/CD (GitLab) and UAT infrastructure to streamline testing and deployment for a high-stakes financial platform.
• Improved system reliability through unit and integration testing, reducing production defects on a high-volume financial system.
• Contributed to frontend development using React.js, TypeScript, and Redux - building reusable UI components and a real-time metrics dashboard for transaction monitoring.