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Founder & Sole Engineer

RackUp

A billiards matchmaking app for finding an opponent near you, at a real venue.

Live in Greece on both app stores01/2026 Present

Available in Greece for now. Other countries are planned.

What I built

  • Designed, built and shipped solo: product, architecture, backend, store listings and releases on both platforms. Live on Google Play since July 2026 and on the App Store since September 2026, available in Greece for now.
  • Kotlin, Jetpack Compose and MVI, with Kotlin Multiplatform sharing the business logic across the Android and iOS apps.
  • Firebase backend with hardened Firestore security rules and Cloud Functions, plus a hand-researched venue directory served live.

Stack

  • Kotlin
  • Jetpack Compose
  • KMP
  • MVI
  • Firebase
  • Cloud Functions
  • Google Play
  • App Store

From the iOS app

  • RackUp welcome screen with an 8-ball logo and buttons to continue with email or with Apple.
    Sign in
  • Venues screen listing 65 venues, starting with billiard clubs in Athens, each with its address.
    Venue directory
  • Post your availability screen: pick 8-ball, 9-ball or 10-ball, a venue, a date and a time.
    Post a game
  • A venue page showing its address, number of tables and amenities, with buttons to check in or get directions.
    Venue details

Get in touch

Available now · B2B contract, full or part time · 100% remote · Athens, Greece (UTC+2/+3)

[email protected]Back to Theofanis Paschos