Senior Software Engineer at Useful Tech (Copi)

Architected and owned end-to-end backend services for a financial assistant platform using Node.js, TypeScript, and Express; established backward-compatible REST APIs, pagination contracts, and service boundaries to enable rapid product iteration with zero-downtime deployments. Implemented secure authentication/authorization using Auth0 and JWT with user-scoped access controls, token refresh workflows, and role-based permissions across distributed microservices. Designed fault-tolerant Plaid integration delivering 98.9% pipeline reliability with incremental sync, idempotent upserts, and deduplication logic while handling API failures gracefully. Built production multi-agent AI evaluation system using LangGraph and RAG over financial documents to reduce hallucinations and maintain sub-second p95 latency.

Manager, Software Development Engineer at Reliance Jio (Retail POS Team)

Owned architecture and scaling of distributed billing platform serving 440M+ active users, guiding decisions on consistency guarantees, fault isolation, sharding strategies, and operational excellence in high-throughput payment environments across India's largest telecom network. Delivered BNPL integrations with 4 major banks (ICICI, IDFC, HDFC, DMI) using Vitess-sharded MySQL and Kafka, improving payment success from 91.5% to 97.3% and achieving 99.79% idempotency through distributed transaction coordination. Reduced API p95 latency by 40% (450ms to 270ms) via geohash-based indexing, intelligent sharding for location queries, and multi-tier Redis caching achieving 80.2% cache hit rate with p95 85ms on hot paths. Shipped high-volume KYC verification system with face-scan, liveness detection, OCR, reducing onboarding time from 12min to 7.2min and driving 50K+ monthly SIM activations. Led and mentored a cross-functional team of 10+ engineers, owning technical roadmap, architecture review