How to Build a Live Global Leaderboard Using Postgres and Supabase Realtime

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Building a real-time global leaderboard requires careful architecture to stay accurate and performant under heavy load. The approach uses an append-only events table paired with a scores aggregate table, indexed by descending total score to make top-N reads and rank lookups efficient. For high read volumes, a concurrently refreshed materialized view reduces database strain by turning leaderboard reads into simple primary-key lookups. Supabase Realtime's broadcast channel is recommended over row-level change streams to push pre-computed leaderboard payloads to all connected clients at once. Optimistic local score updates are applied immediately on the client side, with the authoritative server value silently reconciling any discrepancy when the broadcast arrives.

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