I will fix node js express api bugs and backend errors

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

Over deze dienst

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

    • Op maat

  • Type website

    • E-commerce winkel
    • Zakelijk
    • SaaS
    • Overige

  • Programmeertaal

    • JavaScript
    • TypeScript
Respecteer de rechten van derden

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Maak kennis met Shazzad Hosen

Shazzad Hosen

Backend Developer specializing in NodeJs APIs and AI Integration

  • Afkomstig uitBangladesh
  • Lid sindsjul 2026
  • Gem. reactietijd1 uur

  • Talen

    Bengaals, Engels, 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.

Mijn portfolio

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