Bug fixes and API integrations
Got a broken feature, a failing integration, or an API that will not behave? I will diagnose and fix it fast.
What I do:
- Bug fixing in Node.js, Python, React, TypeScript codebases — reproduction, root cause, clean fix, regression-safe
- REST API integrations: payment gateways (Stripe, crypto processors, NowPayments/BTCPay), Telegram API, CRMs, third-party services
- Webhook debugging: signature verification, retries, idempotency, duplicate-event protection
- Database issues: slow queries, N+1, indexing (MySQL, PostgreSQL, MongoDB, SQLite)
How we work: you share the repo or a detailed bug description, I reply with diagnosis and fixed price within a few hours. Small fixes done in 1-3 days. Clean commits, short report of what was wrong and what changed.
I maintain my own production services with live payments — I treat your bug like it is costing me money.
