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I will fix bugs, errors, and issues in your mern stack web application fast
Jay Sakhiya
About this gig
MERN Stack Bug Fixing Expert Fast, Clean & Reliable
Is your React, Node.js, Express, or MongoDB application throwing errors? I specialize in diagnosing and fixing all types of bugs, errors, and performance issues in MERN stack web applications fast.
What I fix:
React component errors, state management & hook issues
Node.js / Express API errors, route issues & middleware bugs
MongoDB / Mongoose query errors & connection issues
JWT authentication & authorization bugs
REST API integration errors & CORS issues
Deployment errors (Heroku, Vercel, Netlify, AWS)
Performance optimization & slow API responses
Console errors, TypeScript errors & build failures
My Process:
1. Review your codebase & reproduce the bug
2. Identify root cause & provide a clear explanation
3. Deliver clean, tested, production-ready fix
Why hire me?
3+ years of MERN stack development experience
Clean, commented code with no shortcuts
I explain what was wrong so you learn too
Fast communication & quick turnaround
Message me before ordering share your issue and I'll confirm I can fix it!
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 Jay Sakhiya
Jay Sakhiya
Senior MERN Stack and NextJS Developer
- FromIndia
- Member sinceMar 2026
- Avg. response time1 hour
Languages
Gujarati, English, Hindi
Looking for a clean Next.js architecture or a scalable MERN stack application built to enterprise standards? I am a Senior Full Stack Developer specializing in writing clean, type-safe TypeScript code backed by rock-solid Node.js and NestJS backends.
What I Focus On:
• High-performance Next.js and MERN stack systems.
• Flawless MongoDB schema design and query optimization.
• Secure JWT authentication and API integrations.
No boilerplate templates. Just optimized, premium engineering. Please message me before ordering to discuss your architecture!
My Portfolio
FAQ
What types of bugs can you fix in a MERN stack app?
I fix all types of bugs including React state and rendering errors, Next.js App Router and SSR issues, Node.js and Express backend crashes, MongoDB query and connection errors, TypeScript compilation errors, authentication issues, and API integration failures with services like Stripe, Firebase, and
Can you fix Next.js build errors and Vercel deployment failures?
Yes. I specialise in Next.js 14 and 15 App Router issues including build failures on Vercel and Netlify, SSR/SSG hydration errors, API route errors, dynamic routing problems, and environment variable configuration issues. Share your error log and I will diagnose it immediately.
How quickly can you fix my bug?
Most single bugs are fixed within 24 hours. Complex issues or multiple bugs may take 2–3 days. Please message me first with your error details and I will give you an honest delivery estimate before you place an order.
What information do I need to provide?
Please share your error message or console log, a brief description of the problem, and access to your code (GitHub repo, ZIP file, or CodeSandbox link). The more context you provide, the faster I can fix the issue.
Will the bug come back after you fix it?
I fix the root cause, not just the symptom. I also provide a 7-day free re-check guarantee — if the same bug returns within 7 days of delivery, I will fix it again at no cost.
Can you fix TypeScript and JavaScript errors too?
Yes. I regularly fix TypeScript type errors, interface mismatches, generics issues, and JavaScript runtime errors including undefined references, async/await problems, promise rejections, and CORS errors in both frontend and backend code.
Do you offer ongoing maintenance after the bug fix?
Yes. My Premium package includes ongoing support. I also offer custom maintenance packages for clients who need regular code reviews, bug monitoring, and performance optimisation for their React, Next.js, or MERN stack applications.
