I will fix bugs in your flutter firebase app
Flutter and iOS developer building and fixing apps for startups
Level 1
Has met certain performance criteria and shows strong potential in the marketplace.
About this Gig
Is your Flutter app crashing, slow, or stuck after another developer left?
I take over existing Flutter and Firebase apps, find what's broken and fix it properly. I recently spent 10 months stabilizing and hardening a production app for a Dutch agency: codebase cleanup, security review of backend services and integrations, QA and user acceptance testing through to delivery. I also took over and rewrote a native iOS app for a client in Denmark.
What I can fix:
- Crashes, build errors, broken features
- Slow screens and performance issues
- Firebase security rules and data structure
- Outdated packages and Flutter version upgrades
- App Store and Google Play rejections
You get a short report of what was wrong and what I changed.
Send me the issue before ordering. I'll tell you honestly if I can fix it and how long it will take.
My Portfolio
FAQ
Can you fix an app another developer built?
Yes. That's most of my work in this gig. Send me the code or repository access and I'll review it first.
What do you need from me?
Access to the code (GitHub, GitLab or a zip file), a description of the bug, and steps to reproduce it. Screenshots or videos help.
What if the bug can't be fixed in the package time?
I'll tell you before starting. If it needs more work, I'll send a custom offer, so there are no surprises.
Do you also fix native iOS (Swift) apps?
Yes, I work with Swift and SwiftUI as well as Flutter.

