Unity Global Leaderboard Integration

I’ve completed the core gameplay and now need a global leaderboard that plugs cleanly into my existing Unity project. The board must fetch and display each player’s name, score, and rank in real time, and add a small country flag beside the name for quick geographic context.

I’m flexible on the back-end: PlayFab, Firebase, a lightweight custom REST API—whichever you feel will scale reliably without ballooning costs is fine, as long as it supports secure score submission and simple GDPR-compliant data storage. The front-end panel should match my current UI style (Unity UI Toolkit) and work on both iOS and Android builds.

Deliverables:
• Fully commented C# scripts for sending, retrieving, and ordering scores
• UI prefab that lists name, score, rank, and flag, auto-resizing for different screens
• Simple admin method (editor window or CLI) to wipe or reset scores when I push a new season
• Setup guide so I can redeploy the service or change keys later

I’ll test with a sandbox key first, then switch to production once the integration passes these checks:
– Scores display within 1 s of submission on a 4G connection
– Incorrect or tampered submissions are rejected server-side
– Country flag loads correctly for at least 95 % of test IPs

Let me know which service you recommend and your estimated turnaround.