Browse categories
Explore
Fiverr Pro
English
$
USD
I will fix bugs and errors in your web or mobile app
MartinN
About this gig
Having a bug in your web or mobile application?
I will investigate and fix bugs or errors in your existing application.
I can help with:
React / Next.js
React Native / Expo
Flutter / Dart
TypeScript / JavaScript
Supabase
SQLite
UI and functionality issues
Database and data-saving issues
Login and authentication problems
Runtime errors and crashes
Other small to medium development issues
I work with AI-assisted development tools to investigate problems, implement fixes and test the result.
IMPORTANT:
Please contact me before ordering if you are unsure whether your issue is suitable for this Gig. The package price depends on the complexity of the problem. Large projects, complete application development and major feature development are not included in the Basic package.
Get to know MartinN
MartinN
Mobile Network Technician
- FromSlovakia
- Member sinceMar 2025
- Avg. response time1 hour
Languages
English, Slovak, German, Russian
I’m a technical developer focused on building and fixing web and mobile applications. I work with React, Next.js, React Native, Expo, Flutter, Dart, TypeScript, JavaScript, Supabase and SQLite. I have hands-on experience with application development, databases, authentication, local storage and cloud synchronization. I use modern AI-assisted development tools to work efficiently and solve technical problems. My goal is simple: deliver functional solutions, communicate clearly and provide reliable results.
Other Software Development Services I Offer
FAQ
What do you need to start fixing my bug?
I need a description of the problem, the expected behavior, the actual behavior and, if available, the error message or screenshot. If necessary, I may also need access to the relevant project files.
Can you fix bugs in an existing project?
Yes. I can work with existing web and mobile projects and investigate errors in the code.
What technologies do you work with?
I mainly work with React, Next.js, React Native, Expo, Flutter, Dart, TypeScript, JavaScript, Supabase and SQLite.
Can you fix any bug?
No. The Gig is intended for small to medium issues. Please contact me before ordering if the problem is complex or you are unsure whether I can help.
Can you develop a complete application?
Yes, but complete application development is not included in this Gig. Please contact me for a separate offer.
