Game Site Development

I have the old code for my own game site and are looking for an experienced web developer to help me to update it with new features and fix current issues.

and want to add some features

1. Fix the spin feature (wheel/roulette) – current spin logic is not selecting the correct reward
2. Implement in-game chat system – real-time preferred (WebSocket or similar)
3. Add tournament feature – support event creation, user participation, leaderboard, etc.

If you have any experience in these fields, please help me