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Fiverr Pro
English
$
USD
I will debug and fix python, javascript, API, or backend code
Naweid H
About this gig
I will diagnose and fix bugs in Python, JavaScript, APIs, backend services, databases, and web applications.
If your application is crashing, returning errors, failing after an update, timing out, behaving inconsistently, or simply not working as expected, I can investigate the root cause and implement a proper fix.
I can help with issues such as:
- Python and JavaScript bugs
- FastAPI, Flask, Node.js, Express, and backend errors
- REST API failures and integration problems
- Database and SQL issues
- Authentication and authorization bugs
- Webhook and third-party API failures
- Deployment and environment-related errors
- Performance and timeout problems
- Broken business logic
- Async, concurrency, and background-task issues
- Supabase and database-backed application bugs
- Regression bugs after code changes or upgrades
My process is focused on finding the actual cause rather than applying temporary patches. I will inspect the relevant code and logs, reproduce the problem when possible, implement the fix, and verify that the affected functionality works correctly afterward.
For larger or unclear issues, please message me before ordering so I can review the scope and recommend the correct package.
Get to know Naweid H
Naweid H
Software Engineer
- FromUnited States
- Member sinceApr 2026
- Avg. response time3 hours
Languages
English, Persian
I’m a software engineer with a background in Computer Science, Mathematics, and Cybersecurity. I specialize in building modern, responsive websites and full-stack web applications for businesses, startups, and professionals.
I have hands-on experience designing and developing production software, including full-stack platforms, dashboards, authentication systems, databases, APIs, payment integrations, automation tools, and cloud deployments.
I can help with everything from landing pages and business websites to more advanced web applications and backend integrations.
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Other Software Development Services I Offer
FAQ
Can you fix a bug if I do not know what is causing it?
Yes. Diagnosing the root cause is part of the service. Please provide the symptoms, error messages, logs, and access to the relevant code or environment when possible.
What programming languages and technologies can you work with?
My primary work includes Python, JavaScript/TypeScript, APIs, FastAPI, Flask, Node.js, databases, Supabase, integrations, automation, and backend systems.
Can you fix bugs in an existing codebase written by another developer?
Yes. I can review unfamiliar repositories, trace the relevant execution path, reproduce the problem, and make targeted changes without unnecessarily rewriting the application.
What if the bug turns out to be larger than expected?
If the investigation shows that the problem is significantly outside the purchased scope, I will explain what I found before doing additional work. We can then use a Gig Extra or custom offer.
Do you test the fix before delivery?
Yes. I verify the affected functionality after implementing the fix and, where appropriate, add or run tests to reduce the chance of regression.
