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I will fix react, next js, nestjs and node js bugs, API and database issues
Tariq Khan
About this gig
Is your React, Next.js, Node.js or NestJS app crashing, throwing errors or returning 500s? I'll find the real cause and fix it properly not patch over it.
I'm a full-stack JavaScript developer with 5+ years in React, Next.js, Node.js, Express, NestJS, MongoDB and PostgreSQL. I work inside existing codebases every day, so I can get into yours quickly.
What I fix:
React / Next.js: crashes, blank pages, hydration and build errors, broken forms or state
Node.js / Express / NestJS: 500 errors, failing routes, JWT and auth, guards, CORS, timeouts
PostgreSQL / MongoDB: connection errors, failed migrations, wrong data, slow queries (TypeORM, Prisma, Mongoose)
API, payment and third-party integration bugs
TypeScript errors and failed builds or deployments
What you get:
The fix pushed to your repo (or a patch file)
A short note on the cause and what changed
Confirmation that the related flows still work
Not sure which package fits? Send me the error before ordering and I'll tell you honestly what it needs.
Get to know Tariq Khan
Tariq Khan
Full Stack Developer
- FromPakistan
- Member sinceSep 2022
- Avg. response time1 hour
Languages
English, Urdu
Full-stack developer with 5+ years turning ideas into production-ready web apps — from database design to the UI your users see.
→ Backend — Node.js, Express, NestJS, REST/GraphQL APIs, microservices for real traffic
→ Database — PostgreSQL & MongoDB, optimized for scale
→ Frontend — React.js & Next.js, production-grade UIs
→ Cloud — AWS Lambda & Docker, cost-efficient deployment
You'll get clean, documented code, clear communication every step of the way, and realistic timelines.
Send me your project details — I'll reply within a few hours with a clear plan.
My Portfolio
Other Software Development Services I Offer
FAQ
What kinds of bugs can you fix?
Anything in a React, Next.js, Node.js, Express, NestJS, MongoDB or PostgreSQL app: crashes and console errors, broken forms or logic, failing API routes and 500 errors, auth and CORS problems, database connection or data issues,
Can you fix backend and API errors, not just the React side?
Yes. Many bugs sit between the frontend and the API. I work across both, including Node.js, Express and NestJS backends.
Can you fix database-related errors?
Yes, for MongoDB (Mongoose) and PostgreSQL (Prisma, TypeORM or raw SQL): connection failures, schema and validation errors, duplicate keys, wrong query results, and slow queries caused by a bug.
Can you add a small feature at the same time?
Yes, in the Standard and Advanced packages, as long as it lives inside an existing feature (a new field, filter, validation or endpoint change). Larger features belong to my full-stack or MERN development projects.
What if my issue turns out to be bigger than the package?
I tell you as soon as I know, before doing extra work. We then either add an add-on, move to the right package, or I return what I have found so you can decide.
