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$
USD
I will fix node js bugs, express backend errors, and code issues
David S
About this gig
Is your Node.js server crashing? Getting frustrating CORS, JWT, or MongoDB errors? Don't panic. As a Full-Stack Developer, I specialize in deep debugging, backend refactoring, and server optimization to fix your issues fast.
What I Can Fix For You:
- Node.js/Express: Server crashes, routing bugs, middleware issues.
- Databases: MongoDB/Mongoose connection drops, slow queries, validation errors.
- Auth & Security: JWT expiration, Passport.js, OAuth 2.0, bcrypt hashing.
- API Integration: Broken RESTful APIs, third-party API and JSON parsing errors.
- Deployment/CORS: Environment variables fixes, CORS, deployment issues.
Why Choose Me?
- Clean Code: I write clean, maintainable, and secure JavaScript/TypeScript.
- Fast Communication: Quick response times and clear status updates.
- Support: 100 percent satisfaction guaranteed before final delivery.
How It Works:
1. Share your code repository or error logs.
2. I diagnose the root cause of the issue.
3. I safely fix the bug and test the solution.
NOTE: Please contact me BEFORE placing an order so we can choose the right package!
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Get to know David S
David S
Fullstack MERN Developer for Modern Web Applications
- FromArmenia
- Member sinceJun 2026
Languages
Armenian, Russian, English
Hi, I'm David — a Fullstack MERN Developer who builds modern web applications with React, Node.js, Express, MongoDB, and TypeScript. I focus on clean architecture, scalable solutions, and maintainable code that lasts. Whether you need a frontend, backend, or a complete full-stack application, I'm committed to delivering reliable, high-quality results with clear communication and attention to detail.
My Portfolio
FAQ
Do I need to contact you before placing an order?
Yes, please contact me first. I need to review your error logs or code snippet to make sure I can fix the issue and to help you choose the correct package.
What programming languages and frameworks do you support?
I specialize in Node.js and Express.js backend development, working with both JavaScript and TypeScript, as well as MongoDB and Mongoose databases.
What do you need from me to start fixing the bug?
I will need a clear description of the error, screenshots or text logs of the crash, and access to the affected source code repository or files.
