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Fiverr Pro
English
$
USD
I will fix bugs in your node,js or express,js backend
i build systems not the basic coder
I'm a full-stack developer specialising in React, Next.js, Express.js and Node.js with a good amount of hands-on experience. I build fast, clean, and modern websites and landing pages that actually co...
About this Gig
Server crashing? API returning the wrong data? Routes not connecting? I'll dig into your Node.js/Express backend, find the actual root cause (not just a band-aid fix), and get it working properly.
What I can fix:
- API endpoints not returning correct responses
- Server crashes and unhandled errors
- Database connection issues (MongoDB, PostgreSQL, Supabase)
- Authentication/authorization bugs (JWT, sessions, RLS issues)
- Middleware and routing conflicts
- Async/await and Promise-related bugs
- Performance issues (slow queries, memory leaks)
How I work:
- You share your repo/code and describe the issue
- I reproduce the bug and trace the root cause
- I fix it and test thoroughly
- I explain what caused it (so it doesn't happen again)
I work regularly with Node.js, Express.js, REST APIs, Supabase, MongoDB, and have hands-on experience with real-time systems and secure data access patterns (like Row-Level Security), so I can debug both surface-level and deeper architecture issues.
FAQ
Do I need to share my full codebase?
Just the relevant files/routes usually — but if the bug is hard to isolate, full repo access helps speed things up.
What if there are more bugs than expected once you start?
I'll let you know immediately and we can adjust the package or scope before continuing — no surprise charges.
Can you also explain the fix to me?
Yes, a brief explanation is included; a full written report is available as an add-on.
Do you work with TypeScript backends too?
Yes, I work with both JavaScript and TypeScript Node.js/Express projects.
What if the bug isn't actually in the backend?
I'll let you know if it's a frontend or infra issue and point you in the right direction
