Battle Royale Gaming Tournament App Development

I am looking for an experienced mobile app developer or development team to build a gaming tournament platform for battle royale games such as Free Fire. The platform should allow users to join tournaments, pay entry fees, submit results, and receive prize winnings through an integrated wallet system.
User App Features
Mobile OTP Login
Google Sign-In
User Profile
Tournament List and Details
Join Free and Paid Tournaments
Entry Fee Payment
Room ID & Password Display
Match History
Result Submission with Screenshot Upload
Leaderboards and Rankings
Push Notifications
Wallet Balance
Deposit Funds
Prize Money Credit
Withdrawal Requests via UPI
Transaction History
Referral System (optional)
Admin Panel Features
Create, Edit, and Delete Tournaments
Manage Users and Participants
Publish Room IDs and Passwords
Verify Match Results
Manage Leaderboards
Approve or Reject Withdrawal Requests
Manage Wallet Transactions
Send Notifications and Announcements
Dashboard with Analytics and Reports
Payment & Wallet Features
Razorpay Integration (preferred)
Support for UPI, Credit Cards, Debit Cards, and Net Banking
Entry Fee Collection
In-App Wallet System
Prize Distribution to Wallet
UPI Withdrawals
Transaction Logs and Reports
Secure Payment Processing
Technical Requirements
Flutter (Preferred)
Firebase for Authentication, Database, and Notifications
Secure Backend Architecture
Modern Gaming UI/UX
Scalable Infrastructure
Clean and Well-Documented Code
Deliverables
Android App (Production Ready)
Admin Panel / Web Dashboard
Complete Source Code
Database Setup and Documentation
Deployment Assistance
Bug Fix Support After Delivery
Future Scalability
The platform should be built in a way that supports future features such as:
Automated Tournament Management
Advanced Referral System
KYC Verification
Anti-Cheat Mechanisms
Multiple Game Support
Real-Time Match Tracking
iOS Version
Please Include in Your Proposal
Estimated Cost
Development Timeline
Technology Stack
Relevant Portfolio or Similar Projects
Suggested Improvements and Additional Features
Important: Full source code ownership and intellectual property rights must be transferred to me upon project completion.