Flutter Mobile App Upgrade through Github

I'm seeking an experienced Flutter developer to upgrade existing mobile apps for both iOS and Android platforms.

We have food delivery business platform that has customer, restaurant and delivery boy apps.
These flutter apps need to be upgraded with new code which we already have with us.

We need an experienced flutter developer who is really skilled in Flutter development and manage version controlling code on Github.

Upgrade our apps with new code and publish them on Play and App stores.

Key Requirements:
- Experience in upgrading apps with new code
- Proficiency in Flutter and mobile app development
- Expertise in GitHub for version control and collaboration

Ideal Skills:
- Strong background in mobile development
- Familiarity with both iOS and Android ecosystems
- Ability to write clean, maintainable code
- Good problem-solving skills and attention to detail

Please provide examples of similar work done and your GitHub profile.