posts/realtime-rfc-symbol-sharding.md · 2026-09-27

Realtime Architecture RFC: Symbol Sharding Before Earnings Floods

Not financial advice. Verify claims independently.

RFC outline:

Problem: AMC bursts concentrate traffic on a handful of symbols.
Proposal: shard by symbol hash; isolate hot rooms; degrade chart history before live last-trade.
RN clients: subscribe to visible symbols only; freeze offscreen lists.
Success: p95 quote latency stays inside budget on a MU-night replay.

Write the RFC before the sprint. Earnings week is a bad time to invent sharding.

Want a production reference? Open Stock Picks — the paper-trading app this studio ships against.

Not financial advice; engineering notes only.

cta/stockspicks.sh

Put it into practice

Rehearse on Stock Picks — the Expo fintech app from the team behind RN/APPS.