At Market2Marketing, I delivered three client projects end-to-end, translating business requirements into production software with cross-functional teams. For ADITI – Defence Magazine Platform, I built a full-stack platform with React, Express.js, and MySQL, integrated Razorpay payments, and deployed it on Hostinger.
I built Orbit, a crypto paper trading platform with live prices for 25 pairs through the Binance API. Server-side order processing uses a single database transaction to keep balances correct during concurrent trades.
On Orbit, I also built a token bucket rate limiter with four request tiers and added 17 integration tests using a real PostgreSQL database. GitHub Actions runs the tests automatically.
I also built Royal Mint, a banking application with idempotency keys and MongoDB transactions to prevent duplicate transfers and keep updates consistent. Its immutable double-entry ledger records corrections as reversal entries.
