Bold Core LLC · Full-Stack Development

We build
real products.

Mobile apps. Backend systems. Realtime features.
From idea to app store — no bloat, no excuses.

React NativeNext.jsNode.jsThree.jsPostgreSQLExpoWebSocketPrisma
Email us →

01 / Mobile

Yavii
Ride Sharing

Mongolian ride-sharing — drivers create trips, passengers book seats. Built solo, from zero to app store.

  • ▸Real-time WebSocket messaging
  • ▸Google & Facebook OAuth
  • ▸Expo Push Notifications (FCM + APNs)
  • ▸Driver analytics dashboard
  • ▸Wallet & subscription system
  • ▸Mongolian / English — 700+ strings
React NativeExpo SDK 54Fastify 5PrismaPostgreSQL
↗ Google Play
yavii.online
yavii.online
yavii.online
yavii.online

02 / Web

yavii.online

Full web platform for the same service. SSR, SEO-ready. Shares the same Fastify backend with the mobile app.

  • ▸Next.js App Router with SSR
  • ▸Shared Fastify backend with mobile
  • ▸Responsive across all screen sizes
  • ▸Deployed on Railway
Next.jsReactREST APIRailway
↗ Visit site

03 / Backend & API

Production-grade.
Zero compromise.

20+
API Endpoints
700+
i18n Strings
Real-time
WebSocket
2
App Stores
Auth
Email/password + Google + Facebook OAuth, JWT, email verification, 6-digit codes
Real-time
WebSocket with auth, typing indicators, online status, read receipts, multi-device
Push notifications
Expo SDK, Firebase (Android), APNs (iOS) — with offline fallback logic
Payments
Wallet, subscription model, per-seat fees, full transaction ledger
Fastify 5Prisma 7PostgreSQLJWTWebSocketNodemailernode-cronRailway

04 / Contact

Let's build
something.

Available for freelance. Full-stack, mobile, frontend — shipped on time.

Email
bold.core.soft@gmail.com
→
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