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I will fix bugs and errors in your javascript web application
Antonio Manzano
About this gig
Is your JavaScript web application showing errors, broken features, or unexpected behavior?
I specialize in diagnosing and fixing issues in React, Next.js, Node.js, Express.js, APIs, and database integrations.
I can help with:
· Frontend and UI bugs
· Backend and API errors
· Forms, authentication, routing, and state issues
· Database and integration problems
· Build, dependency, deployment, and performance issues
Why work with me?
· Clear communication and realistic expectations
· Root-cause analysis, not temporary patches
· Clean, maintainable, and tested code
· A clear summary of the changes made
Please contact me before ordering and send the source code or repository access, error messages, steps to reproduce the issue, expected behavior, and relevant screenshots or logs.
The Basic package covers one small and clearly reproducible bug. Complex, unclear, multiple, or environment-specific issues may require a higher package or custom offer. Revisions cover only the originally agreed issue. New features and unrelated bugs are not included.
Get to know Antonio Manzano
Antonio Manzano
Software Developer, Web Apps, Automation and APIs
- FromSpain
- Member sinceJul 2026
- Avg. response time1 hour
Languages
Spanish, English
I am a Computer Engineering student currently entering my fourth year, focused on software development, automation, and practical digital solutions. I can help you build scripts, web applications, custom tools, API integrations, and automation workflows, as well as fix bugs, improve existing code, and create clear technical documentation. I approach every project with attention to detail, transparent communication, and a strong commitment to delivering reliable, well-structured, and maintainable results.
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FAQ
What information do you need before starting?
Please provide the source code or repository access, error messages, screenshots, steps to reproduce the issue, the expected behavior, and any relevant environment details. Contact me before ordering so I can confirm the correct package.
Can you fix any JavaScript web application?
I work with JavaScript applications using technologies such as React.js, Next.js, Node.js, Express.js, APIs, and databases. Please contact me first because some projects may require specific access, tools, or additional investigation.
Is my source code kept confidential?
Yes. Your source code, credentials, project information, and business data will be treated as confidential and used only to complete the agreed work. Please use temporary credentials whenever possible.
What is included in a revision?
A revision covers adjustments directly related to the originally agreed bug. New features, unrelated errors, design changes, or additional functionality are not included and may require an extra or a separate order.
Do you test the fix before delivery?
Yes. I will test the agreed issue using the information and environment available. You should also verify the fix in your production or final deployment environment before releasing it to users.
