Pine Labs Private Limited
Jul 2022 – May 2024
Overview
At Pine Labs, I was part of the core backend engineering team responsible for building and scaling the Subscription Model Application and enhancing payment services for UPI and card transactions. The role demanded strong architectural thinking, low-latency service design, and real-time data handling in a high-traffic environment.
My Role
As an SDE I, I led the design and development of key API services, focusing on performance, scalability, and secure integrations. I worked extensively on asynchronous REST APIs, database optimization, Kafka-based communication, and payment service enhancements.
Skills Acquired
Object-Oriented Design (HLD & LLD), API architecture
Spring WebFlux, JWT-based authentication, and custom filters
Performance tuning for SQL and Redis-based caching
Kafka Producer/Consumer design with retry and fallback mechanisms
Deep understanding of asynchronous programming and scalable microservices
Impact
Boosted system throughput by 30% through optimized API design for subscription services
Improved API response time by 50% with high-performance async WebFlux APIs
Strengthened security by 25% with robust JWT-based auth and custom filters
Reduced latency by 30% and improved scalability via Redis and optimized DB queries
Increased TPS by 200% in payment services, enhancing system reliability during peak load
Improved microservice communication efficiency by 40% with Kafka pipelines and fault-tolerant messaging