Amit Kumar B.

I owned the payments platform behind KFC, Pizza Hut and Hardee's across 10 markets: ~60,000 orders/day and $1.2B+ a year. I build and fix Node.js backends where failures cost real money. 8+ years in backend engineering (Payments Owner at Americana Restaurants, Technical Lead at HCLTech). I've handled payment flows end to end: gateway integrations, webhooks, refunds, fraud rules, and the monitoring that catches failures before customers do. Recent results: • Cut p95 latency on a high-traffic payment-methods API by removing serial downstream calls and middleware overhead • Reduced the error rate on a core payment service and fixed broken New Relic reporting • Built a rule-based fraud prevention engine on Aerospike • Shipped a bank loyalty-points integration into consumer ordering apps • Set up SLOs/SLIs for payment services What I can do for you: ✔ Stripe / PayPal / payment gateway integrations: subscriptions, webhooks, failed-payment fixes ✔ Node.js / TypeScript APIs and microservices (Express, gRPC) ✔ Slow APIs, timeouts, error spikes, production debugging ✔ Kafka, Redis, MongoDB, PostgreSQL, Aerospike ✔ Deploying and monitoring on AWS and Docker, New Relic ✔ Full MVPs and apps built from scratch: React Native mobile apps, React and Next.js websites, admin panels and payments, for booking, food ordering, delivery and marketplace products Clear written updates, fixed-scope quotes, and quick turnaround on urgent fixes.