Website - Build Competition Marketplace Website (Voting + Leaderboard + User Dashboard)

We are building a competition marketplace website where users can create contests, participate, and vote.
Core features required:
User login (Google)
Users can create competitions
Users can participate by uploading files or adding links (YouTube, Instagram, etc.)
Voting system (1 vote per user, no duplicate voting)
Leaderboard based on votes
Score calculation (votes + bonus points)
Dashboard (My participation, votes, competitions)
Competition page with participant cards and voting
Option for paid or free competitions
Admin panel to manage users, competitions, and results
Important:
Only website votes count (external links are just for preview)
Platform should be simple, fast, and mobile-friendly
Full detailed requirements will be shared after discussion.
Looking for an experienced developer who can build MVP first.