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I will fix backend bugs and API issues
Lee Adams
About this gig
Backend bugs and API issues can block users, break integrations and slow down development.
I will investigate, debug and fix backend/API problems in your existing project, with a focus on reliable fixes rather than random patches.
I can help with Node.js, Express.js, JavaScript, TypeScript, FastAPI, Django, Python, Spring, REST APIs, authentication, databases, webhooks, server errors and performance issues.
What I can fix:
- Broken API endpoints and failed requests
- Backend logic errors and server crashes
- Authentication, token and session issues
- Database query, schema or connection problems
- Webhook failures and integration bugs
- Slow endpoints, timeouts and reliability issues
- Build, dependency or environment-related errors
I focus on clear investigation, maintainable fixes, useful delivery notes and testing where possible, so you understand what changed and why.
This gig is best for clients who already have a backend, API, app or integration that needs debugging or reliability improvements.
Please message me before ordering so I can review the issue, confirm the scope and recommend the right package.
Get to know Lee Adams
Lee Adams
Software Engineer for Code Cleanup, Backend Debugging and Automation
- FromUnited Kingdom
- Member sinceMar 2023
- Avg. response time4 hours
- Last delivery2 weeks
Languages
English
I’m a UK-based, self-taught software engineer with 6+ years of programming experience and a strong freelance background. I help clients clean up, debug, automate and improve existing software using Python, JavaScript, TypeScript and Java. I’ve built real projects across APIs, backend systems, dashboards, automation, data tools and AI-assisted workflows. I focus on clear communication, reliable delivery, maintainable code, useful documentation and practical technical solutions.
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FAQ
What kind of backend bugs can you fix?
I can help with broken API endpoints, server errors, failed requests, authentication issues, database problems, webhook failures, environment errors, slow responses, dependency issues and backend logic bugs.
Do you need access to my full codebase?
Usually, I need enough code to reproduce and fix the issue. A GitHub repository or ZIP file is ideal. If the issue is isolated, I may only need the relevant files, error logs and setup instructions.
Can you fix Node.js or Express API issues?
Yes. I can work with Node.js, Express.js, JavaScript and TypeScript backend projects, including REST APIs, middleware, auth logic, database calls, webhooks, routing issues and server-side errors.
Can you work with Python or Java backends too?
Yes. Although the gig metadata focuses on JavaScript, I can also work with Python backends such as FastAPI and Django, as well as Java/Spring backend systems where the scope fits the package.
What if I do not know what is causing the bug?
That is fine. Please explain what should happen, what currently happens, and share any error messages, logs or screenshots. I will investigate the issue and identify the likely cause before applying a fix.
Can you fix database-related backend issues?
Yes. I can help with query errors, schema problems, failed connections, ORM issues, migrations, broken data flow and API-to-database bugs. The exact scope depends on the package and project access.
Can you help with deployment or environment errors?
Yes, if the issue relates to backend configuration, dependencies, environment variables, build errors or server runtime problems. Hosting access may be needed depending on the issue.
Will you explain what you changed?
Yes. I include fix documentation or delivery notes explaining the issue, what was changed and anything important to know after delivery. Larger packages may include more detailed code comments.
What counts as a revision?
A revision covers reasonable adjustments related to the agreed bug fix. New bugs, unrelated features, extra endpoints, new integrations or wider refactoring are outside the original scope and may need an extra or custom offer.
Should I message you before ordering?
Yes. Backend bugs can vary a lot in complexity. Please message me first so I can review the issue, confirm the right package and avoid scope problems before the order starts.
