Build youth football training and athlete development app

I am looking for an experienced developer (or small team) to build a web app for a youth football (soccer) athlete development platform.

I have already created an MVP using a no-code tool (Base44), and now need a more scalable, fully functional version built properly.

PROJECT OVERVIEW

The platform is designed to help young footballers improve their athletic performance through structured training programs, progress tracking, and gamification.

It is aimed at players aged 10–18 and their parents.

The goal is to provide access to structured training, similar to what professional academy players receive, at an affordable monthly price.

Core features

1. User Accounts
- Parent accounts (email login)
- Ability to create multiple child profiles
- Child login using 4-digit PIN
- Individual player accounts (email login)

2. Player Profiles
- Player data (age, height, weight, position)
- Player ratings (pace, strength, agility, etc.)
- FIFA-style player card with profile image

3. Training Programme System
- 8-week structured training programs
- Progressive overload logic
- Multiple program types (speed, strength, agility, conditioning, skills)
- Weekly training plans

4. Exercise Library
- Database of exercises (speed, strength, agility, ball mastery, etc.)
- Each exercise includes description, sets/reps, and video

5. Progress Tracking
- Track performance metrics (speed, strength, fitness, etc.)
- Graphs showing improvement over time
- Weekly reports

6. Gamification
- XP points
- Levels
- Training streaks
- Badges

7. Social Features
- Add friends
- Leaderboards (weekly XP, streaks, etc.)
- Activity feed

8. Subscription System
- Free plan
- Paid plans
- Family plan (multiple children)
- Stripe integration

DESIGN REQUIREMENTS

- Dark, modern, professional UI
- Clean sports performance dashboard style
- Similar feel to Nike Training Club / Strava / Hudl
- Mobile responsive

TECH REQUIREMENTS

Open to suggestions, but ideally:
- React / Next.js frontend
- Backend with database (Firebase, Supabase, or similar)
- Stripe for payments

WHAT I WILL PROVIDE

- Full product idea and structure
- Base44 MVP for reference
- Feature list and user flow
- Design direction

WHAT I NEED

- Full development of the platform
- Clean UI/UX implementation
- Scalable architecture
- Ongoing support (optional)

GOAL

To build a high-quality MVP that can be launched to real users and scaled into a full product.

Please include examples of similar work or apps you have built.