I will fix bugs and errors in your node js python go or php backend

Your code was working yesterday. Today it isn't, and the error message tells you nothing useful. I fix backend bugs Node.js, Python, PHP and Go. Not by guessing and patching, but by reproducing the problem first, finding the actual cause, and fixing that. WHAT I FIX - 500 errors, unhandled exceptions, silent failures - API endpoints returning wrong or empty data - Database queries returning duplicates or nothing at all - Authentication and session bugs - Broken third-party integrations (Stripe, Twilio, SendGrid, payment gateways) - Race conditions and async/await bugs - "It works locally but breaks in production" HOW I WORK 1. You send me the code and describe what should happen vs what actually happens 2. I reproduce the bug on my side I don't fix what I can't reproduce 3. I find the root cause and fix it 4. You get the fixed code plus a short written explanation of what was wrong WHY THE EXPLANATION MATTERS I always tell you what caused the bug, not just that it's gone. If the same mistake exists elsewhere in your codebase, you'll know where to look. WHAT I NEED FROM YOU - Access to the code (GitHub, ZIP, or a snippet if the bug is isolated) - The exact error message or a descrip