Fix React/Next.js Bugs, API Errors & Performance Issues
Professional bug fixing for React, Next.js, Node.js, and MongoDB — fast, clean, and without breaking your existing code.
Is your React/Next.js site crashing? API failing? Slow loading? I fix it — fast.
I specialize in debugging React, Next.js, Node.js, and MongoDB applications. Whether it's a frontend bug, backend crash, API error, or performance bottleneck — I solve it without breaking your existing code.
What I fix:
• React/Next.js errors (hydration, routing, state issues)
• Node.js/Express API failures
• MongoDB query timeouts & connection errors
• Slow loading (Lighthouse 40 → 95+)
• Security vulnerabilities (XSS, CORS, auth leaks)
What you get:
• Clean, maintainable code
• 95+ Lighthouse score (speed + SEO)
• Secure backend & database
• 7-day free support
• Same-day delivery for urgent fixes
Tech: React • Next.js • Node.js • MongoDB • Express.js • Tailwind CSS
Key Features
- React/Next.js debugging (hydration, routing, state)
- Node.js/Express API error fixing
- MongoDB query optimization
- Performance tuning (Lighthouse 90+)
- Security patches (XSS, CORS, auth)
Challenge
Identifying root causes of complex bugs across full-stack applications without breaking existing functionality.
Solution
Used systematic debugging: reproduce the issue, analyze logs, isolate the problem, fix with minimal code changes, and test thoroughly.