Flutter Flow App Development -- 2

I need an experienced Flutter developer to fix performance issues and functional bugs in my existing app. Additionally, I want to add 2 new features.

Key Requirements:
- Fix performance issues and functional bugs (list will be provided with the expected result)
- Add user login and registration (OTP-based)
- Implement fee management system
- Develop an enquiry form

Ideal Skills and Experience:
- Proficiency in Flutter Flow
- Experience with OTP-based authentication
- Strong background in app performance optimisation
- Ability to develop and integrate new app features seamlessly

Looking for a freelancer who can deliver high-quality work within budget. Please share your portfolios and relevant experience.