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I will reliably debug fix and optimize your nodejs backend and express API
Alex
About this gig
I will debug, fix, and optimize your Node.js backend, Express.js API, or server-side application.
I specialize in troubleshooting Node.js backend issues involving REST APIs, Express.js, MongoDB, PostgreSQL, authentication, validation, middleware, database queries, and slow endpoints.
Ill identify the root cause, implement a clean and reliable fix, and test the affected functionality to make sure your backend works as expected.
I can help with:
Node.js & Express.js bugs
REST API errors
MongoDB & PostgreSQL issues
Authentication & authorization
Validation & middleware problems
Database queries and performance
Server-side errors and crashes
Backend optimization
Get to know Alex
Alex
Backend Developer
- FromNigeria
- Member sinceJun 2026
Languages
English
Hi, I’m Alex, a Backend Developer specializing in JavaScript, Node.js, Express.js, MongoDB, PostgreSQL, and REST APIs. I build secure and scalable backend systems, APIs, authentication systems, database solutions, and custom business applications. I also have experience integrating AI features and third-party APIs into web applications. I focus on clean, maintainable code, reliable solutions, clear communication, and on-time delivery. If you need a professional Node.js backend developer to build, fix, or improve your application, I’m ready to help.
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FAQ
What problem are you experiencing?
Please describe the bug or issue and what you expected to happen.
What error are you receiving?
Please provide the exact error message, API response, console output, or logs if available.
How can I reproduce the problem?
Provide the endpoint, steps, request body, parameters, or actions that trigger the issue.
Do you follow security best practices when fixing backend issues?
Yes. I follow appropriate security practices when working on backend code, including validating inputs, handling authentication and authorization carefully, avoiding unnecessary exposure of sensitive information, and keeping security considerations in mind when implementing fixes.
