Browse categories
Explore
Fiverr Pro
English
$
USD
I will debug and fix bugs in nodejs dot net core nextjs or react
Muhammad Anees
About this gig
Most bugs aren't random. They have a traceable root cause. I find it, fix it, and refactor the broken section so it doesn't come back.
I respond to all messages within a hour.
STACKS I DEBUG
- Node.js / Express / .NET Core (C#) API errors routes, middleware, async issues
- React / Next.js rendering bugs, state issues, hydration errors
- PostgreSQL / SQL Server / MongoDB query errors, schema issues
- Redis connection failures, cache invalidation, pub/sub issues
WHAT YOU GET
- Root cause identified
- Clean code along with explanation
- Tested fix with evidence
COMMON ISSUES(Not limited to)
- API returning 500 / 401 / 403 errors unexpectedly
- JWT auth breaking
- Database queries timing out or returning wrong data
- CORS errors, missing headers, broken middleware
- Next.js SSR / SSG data fetching failures or infinite re-renders
WHY THIS IS DIFFERENT
I've debugged production systems under real pressure including a Redis connection pool exhaustion issue across 600K+ concurrent sessions that was causing full production outages at peak traffic.
BEFORE YOU ORDER
Message me first. Share your error, stack trace, or a description of the broken behavior.
NDAs available on request before any code is shared.
Respect third-party rights
Please be aware that it is against Fiverr's policies for sellers to include themes, templates, or any other elements that infringe third-party rights or applicable laws in the delivered work. Read more about in our Guide to Responsible Digital Creation.
Get to know Muhammad Anees
Muhammad Anees
Full Stack Developer, DevOps, Fintech, SaaS Expert
- FromPakistan
- Member sinceJan 2023
- Avg. response time1 hour
Languages
Urdu, English, French, German
Full Stack Software Engineer building scalable SaaS, fintech, and AI-driven web apps. Skilled in React, Next.js, Node.js, and .NET Core, with experience handling 600K+ users and high-throughput systems. I develop secure APIs, responsive UIs, and optimized databases (PostgreSQL, MongoDB, Redis). Experienced in AWS, Docker, and CI/CD for reliable deployments. Focused on clean architecture, performance, and real-world scalability.
My Portfolio
FAQ
What do you need from me to start?
Your codebase (GitHub repo or ZIP), the error message or stack trace, and a description of what's broken and what you expected to happen. The more detail, the faster the fix.
What if you can't find the bug?
I'll tell you before the deadline — not after. If the issue is outside the agreed scope, I'll flag it and advise next steps. You won't be left with nothing.
Do you fix bugs in code you didn't write?
Most orders involve existing codebases I've never seen. That's the job.
Is the fix guaranteed to work?
Every fix is tested before delivery. I provide evidence(screenshot or short video), showing the issue resolved. Revisions are included if the fix doesn't hold.
What if my issue is larger than the Premium package?
Message me before ordering. Complex production issues get a custom quote broken into milestones. I don't cap scope arbitrarily, I scope it honestly.
Do you sign NDAs?
Yes. If your codebase is sensitive, I'll sign an NDA before you share anything. Message me to arrange this before ordering.
