./blog
Shipping notes
OTA fingerprints, FlashList checklists, and the fintech case studies behind RN/APPS.
WebSocket Fanout for Earnings Prints — MU Night Checklist
Wed Sep 30 AMC will spike quote and news sockets. A checklist for fanout, backpressure, and RN subscription hygiene.
read →OpenAI DevDay (Sep 29): What Mobile Trading Apps Can Ship This Week
DevDay lands Tue Sep 29. Practical RN angles for alert copy, research assist, and on-device guardrails — without bolting a chatbot onto checkout.
read →New Architecture Is the Release Train Now
Expo SDK 54 is the last stop for the Legacy Architecture. What that means for a quote app on Reanimated and FlashList.
read →React Native Skia Order Books & 60fps Quote Tapes
When to reach for Skia for order-book heat and tape scrolls — and when FlashList + Reanimated is enough.
read →Nitro / JSI Sockets vs Pure JS WebSockets in 2026
Where JSI-backed sockets help quote apps — and where pure JS WebSockets remain the honest default.
read →Realtime Architecture RFC: Symbol Sharding Before Earnings Floods
A short RFC outline for sharding symbols ahead of earnings floods — so one hot ticker cannot take down the watchlist socket.
read →Precompiled iOS Builds and the Hermes Bytecode Check
React Native 0.81 cut RNTester clean builds from about two minutes to about ten seconds. The catch is knowing when you are not actually on bytecode.
read →Feature-Flagging Micron Alert Banners in RN
How to ship an AMC alert banner for MU night with flags, kill switches, and copy that does not invent numbers.
read →Desk Notes: Building a Watchlist That Survives AMC Bursts
UI and data patterns for watchlists when AMC prints light up five symbols at once.
read →Expo OTA vs Store Review When Markets Move Overnight
What belongs in OTA after an overnight print — and what still needs App Review.
read →Observability for Quote Lag When VIX Is Quiet but Single Names Aren’t
Late-Sep tape: calm index vol, hot single-name events. What to monitor so quiet VIX does not hide MU-night lag.
read →Hire Notes: Shipping Stock Picks-Style Paper Trading Loops
What we look for in RN engineers who can ship paper-trade loops — ledger honesty, socket discipline, and test plans.
read →The React Native Performance Checklist We Run Before Launch
FlashList vs FlatList, reanimated worklets, and the memory leaks that only show up on real devices.
read →Shipping a Fintech App With Expo: What Broke
OTA fingerprints, native build traps, and the fingerprint.config.js fix that saved our release cadence.
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