JustKnow

JustKnow is a social and services mobile app: feed and posts, messaging, business profiles, ride-hailing, notifications, and the auth and profile flows that tie them together—aimed at people who want discovery, chat, and transactional features in one place.

My role

I built the client application in Expo / React Native with TypeScript: Expo Router screens, multiple RTK Query API surfaces for different backends, Socket.IO for realtime messaging and related events, and persisted auth (plus trip-related state where the product needs it) using secure storage where sensitive tokens live.

What we built

• Modular networking: separate query clients per domain instead of one overloaded API module—easier to reason about as the product surface grew.
• Realtime: socket contexts aligned with REST configuration so environments (local vs hosted) stay consistent.
• Maps and location where rides and discovery depend on them, with platform-appropriate sign-in options.

Stack

Expo, React Native, TypeScript, Expo Router, Redux Toolkit and RTK Query, redux-persist with SecureStore, Socket.IO client, NativeWind, maps, FlashList, bottom sheets and motion libraries, Formik and Yup, push notifications, and EAS.

What made it hard

Multiple HTTP bases and socket paths in one app is easy to get wrong. Centralising host and path resolution—and keeping persisted state minimal—reduced footguns when switching environments or shipping native builds to both stores.