I will fix node js express api bugs and backend errors

S
shazzadbackend
S
shazzadbackend
Shazzad Hosen
fix node js express api bugs and backend errors
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fix node js express api bugs and backend errors

About this gig

Is your Node.js or Express API throwing errors, crashing under load, or just not behaving the way it should? You're in the right place.

I specialize in debugging and repairing backend systems REST APIs, authentication flows, and database logic so they hold up under real use, not just in a demo.

What I Offer:

  • Debugging Node.js and Express backend errors, crashes, and unexpected behavior
  • REST API bug fixes broken routes, failed requests, incorrect responses
  • Authentication and JWT-related bug fixes
  • Database query and connection issue debugging (MongoDB, PostgreSQL)
  • Clear explanation of what was broken and why, alongside the fix
  • Clean, tested code no quick patches that break something else later

Why Work With Me:

  • I read your existing code before touching anything no guesswork fixes
  • Security-conscious debugging, especially around auth and data handling
  • Fast turnaround for urgent, live-project issues
  • Clear communication throughout you'll know exactly what was wrong

Send me your error logs, repo access, or a description of the bug before ordering so I can confirm scope and timeline.

  • Platform

    • Custom

  • Website type

    • E-Commerce store
    • Business
    • Saas
    • Other

  • Programming language

    • JavaScript
    • TypeScript
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Get to know Shazzad Hosen

Shazzad Hosen

Backend Developer specializing in NodeJs APIs and AI Integration

  • FromBangladesh
  • Member sinceJul 2026
  • Avg. response time1 hour

  • Languages

    Bengali, English, Hindi
I build secure, production-ready backend systems using Node.js, Express, and Fastify — REST APIs, auth flows, and AI-integrated features. I focus on what's easy to get wrong: JWT auth with refresh token rotation, Redis rate limiting, and clean database design (MySQL, MongoDB, PostgreSQL). Recent work: a production auth API deployed on Render, Aiven, and Upstash, plus LogForge, an AI log intelligence platform. I also fix backend issues in AI-generated apps (Lovable, Bolt.new, Replit). Pursuing a B.Sc. in Physics alongside. Open to freelance work, async-first.

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