Sai Kiran

At WAFU Technologies, I build and own backend platforms for clients across India, the USA, and Cambodia, covering architecture, APIs, integrations, AWS deployments, and production monitoring.

I led EKO's quick-commerce backend from its first commit through AWS deployment and client handover for a platform serving about 10K users and 2K+ products. I built carts, orders, payments, riders, zones, notifications, reports, search, sustainability tracking, and React admin experiences.

For retail and marketplace products, I've integrated Razorpay, PhonePe, PayG, ABA, Porter, Dunzo, Flash Express, Pandago, Firebase, and FCM. My work has reduced delivery assignment time by 50%, manual shipping coordination by 60%, and post-deployment bugs by about 40%.

I use Node.js, TypeScript, Express.js, MongoDB, Redis, BullMQ, AWS, Docker, Prometheus, and Grafana to run reliable systems. Through caching, indexing, load balancing, and monitoring, I've helped achieve 99.9% uptime while lowering database load and API latency.