Technical Consultant for Development Team

I'm seeking a skilled freelancer or development agency to collaborate as a technical consultant alongside my in-house development team. This is not a full outsourcing job; it's a partnership.

Support Needed In:
- Planning, development, and deployment
- Complex backend logic and integration
- Mobile app publication on Google Play Store
- Web development

Tech Stack:
- Flutter
- Firebase
- MySQL
- PHP
- Google Cloud
- Amazon S3
- Google Authentication

Potential Tasks:
- Assisting in publishing apps to Play Store and App Store
- Post-launch maintenance

Requirements:
- Expertise in backend technologies, particularly PHP, MySQL, and Firebase
- Experience with mobile and web development
- Comfortable with long-term collaboration and working alongside an internal team

Flexible payment options: hourly, fixed, or per-component depending on the task.