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English
$
USD
I will fix typescript errors, react bugs, and next js issues fast
Musadaq Hanif
Level 1
About this gig
TypeScript/React/Next.js project broken? I fix it fast.
Errors in console. Build failing. White screen. Deployment broken I know how stressful that is when your deadline is tomorrow.
I find the root cause and deliver a clean, stable fix that doesn't break anything else.
What I Fix:
- TypeScript errors, strict mode & config issues
- React crashes, hook errors, component bugs
- Next.js build errors, routing & deployment failures
- Node.js/Express API bugs, CORS & middleware errors
- MongoDB, PostgreSQL, Firebase connection errors
- JWT/OAuth bugs, performance issues, memory leaks
- AI/LLM integration bugs (OpenAI, LangChain, Claude API)
Tech Stack:
- Frontend: TypeScript, React, Next.js, TailwindCSS
- Backend: Node.js, Express, NestJS, REST, GraphQL
- DB: MongoDB, PostgreSQL, Firebase, Supabase, Prisma
- DevOps: Vercel, AWS, Docker, CI/CD
Why Choose Me:
- Root cause fixes not patches
- AI-assisted debugging for faster results
- Clean, production-ready code
- Clear communication, no ghosting
- Post-delivery support on every order
Urgent issue? Message me first I'll review before you order.
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 Musadaq Hanif
Musadaq Hanif
Full Stack Web Developer React, Next js, TypeScript, MERN
Level 1
- FromPakistan
- Member sinceDec 2022
- Avg. response time1 hour
- Last delivery1 month
Languages
English, German, French, Italian
I’m a Full Stack Web Developer with 5+ years of experience, specializing in React, Next.js, TypeScript, and MERN Stack. I build custom, scalable, and high-performing web applications tailored to your business needs.
✔ 5+ Years Expertise in modern web technologies
✔ Custom UI Components & Responsive Design
✔ Next.js 14, React, Node.js & Express Apps
✔ Database Integration (MongoDB, Firebase, Supabase)
✔ Authentication Systems (JWT, OAuth, Firebase Auth)
✔ Domain Setup & Hosting (Vercel, Netlify, AWS)
My focus is on clean code, optimized performance, and long-term client success.
📩 Let’s chat
My Portfolio
FAQ
Do I need to share my full codebase with you?
Not necessarily but it's better to share full. For most bugs, I just need the specific files or components where the issue is occurring, plus any error messages. However, for complex full-stack issues, sharing a GitHub repo (even a private one) helps me deliver a faster and more accurate fix.
What if you can't fix my issue?
I won't take your order if I can't solve it. That's why I ask you to message me first — I'll review the issue and give you an honest assessment before you spend a single dollar. If for any reason an issue turns out to be unsolvable within the agreed scope, I'll work with you on a fair resolution.
How do you fix bugs faster than other developers?
I use AI-assisted debugging tools alongside 5+ years of hands-on TypeScript and React development. This combination lets me identify root causes in minutes that might take hours manually. You get faster delivery without sacrificing code quality.
I'm using an AI coding tool (Cursor, Lovable, Bolt, Replit) and it created bugs. Can you fix those?
Yes, absolutely. AI-generated code is a major source of TypeScript and React bugs right now — type mismatches, broken hooks, incorrect API usage. I specialize in cleaning up and fixing AI-generated codebases and getting them production-ready
Can you fix my issue without breaking the rest of my code?
That's my #1 priority. I always analyze the broader impact of a fix before applying it. Every solution I deliver is tested to ensure it doesn't introduce new problems. Clean, safe fixes — not messy patches.
I have a tight deadline. Can you deliver faster?
Yes! Message me before ordering and explain your urgency. For most issues, I can offer priority delivery. Turnaround depends on complexity, but I'm known for fast responses and delivery — especially on the Basic package.
Do you work with AI / LLM integrations?
Yes. I fix bugs in apps using OpenAI API, Claude API, LangChain, Vercel AI SDK, and other AI tools. Whether it's a streaming response bug, token handling issue, or broken function calling — I can help.
