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I will fix node js nestjs backend bugs debug api and boost performance
Mujtaba M.
About this gig
Are you facing issues in your Node.js or NestJS backend API?
I am a professional Node.js backend developer who can quickly fix bugs, debug APIs, and improve backend performance.
What I Will Do
I will help you fix and improve your backend system by providing:
- Fix Node.js backend bugs
- Debug REST API issues
- Resolve NestJS and Express.js errors
- Fix database integration issues (MongoDB, MySQL, PostgreSQL)
- Improve API performance and response time
- Clean and refactor backend code
My Expertise
I specialize in:
- Node.js backend development
- NestJS backend architecture
- REST API development and debugging
- Backend performance optimization
- API integration and error handling
Why Choose Me
- Experienced backend developer (Node.js & NestJS)
- Fast and accurate debugging
- Clean and permanent solutions (not temporary fixes)
- Clear communication and on-time delivery
Common Issues I Fix
- API not working / returning errors
- Server crashes or unexpected behavior
- Authentication issues (JWT login problems)
- Database connection or query errors
- Slow API performance
Important Note
Please contact me before placing an order to discuss your issue in detail.
Get to know Mujtaba M.
Mujtaba M.
Computer Scientist, Software Engineer, Full Stack Developer, AI Expert
- FromPakistan
- Member sinceDec 2019
- Avg. response time1 hour
- Last delivery1 month
Languages
English, Italian, Spanish, German, Arabic, Portuguese, Korean, Romanian, Japanese, Finnish
💻 Software Engineer | Computer Scientist | Full-Stack Developer | MERN/MVEN/MEAN/Django Specialist
Hi, I’m Mujtaba Mubasher, an experienced Software Engineer specializing in modern, user-friendly websites and applications. I work with MERN, MVEN, MEAN stacks, Django, and AI-powered chatbots, focusing on responsive designs, Figma to website conversions, backend systems, and databases like SQL, MySQL, MongoDB. I also handle cloud solutions (AWS, Docker, Kubernetes) for scalable, secure deployments. Let’s turn your ideas into reality with efficient, high-quality solutions! 🚀
My Portfolio
Other Software Development Services I Offer
FAQ
Can you fix Node.js backend bugs in existing projects?
Yes. I can debug and fix bugs in existing Node.js, Express.js, and NestJS backend applications, including API errors, authentication issues, database problems, and server-side bugs.
Do you work with NestJS backend applications?
Absolutely. I specialize in NestJS backend development and can fix NestJS bugs, module issues, dependency injection errors, authentication problems, and API-related issues.
Can you debug and fix REST API issues?
Yes. I can troubleshoot and resolve REST API issues such as incorrect responses, endpoint failures, validation errors, authentication problems, and API integration bugs.
Can you improve backend performance?
Yes. I can optimize your Node.js backend by identifying bottlenecks, improving database queries, reducing response times, and enhancing overall API performance.
Which technologies do you support?
I work with: Node.js NestJS Express.js TypeScript MongoDB PostgreSQL MySQL REST APIs API Integrations
What do you need before starting the work?
Please provide: 1: Project source code (GitHub or ZIP) 2: Error logs or screenshots 3: Clear description of the issue 4: Expected behavior of the application This helps me diagnose and fix the issue quickly.
Do you fix database-related backend issues?
Yes. I can resolve database connection issues, query errors, schema problems, ORM issues, and performance-related database bottlenecks.
Should I contact you before placing an order?
Yes. For complex backend systems or large applications, please contact me first so I can review the issue and recommend the most suitable package.
