CityGuidex

Tourists and new city residents had no reliable, locally-curated mobile guide for discovering genuine experiences — most apps showed generic or outdated listings.

Build a mobile-first city discovery platform with curated local content, smart filtering, and an intuitive map-based exploration experience.

Lead mobile engineer. Responsible for React Native architecture, navigation system, API integration, map implementation, and App Store/Play Store deployment.

• 1

  Building a performant map view with hundreds of markers without degrading scroll and interaction performance.

• 2

  Designing an offline-friendly experience for tourists with poor data connections.

• 3

  Curating and structuring location data in a way that scales across multiple cities.

Built with React Native and Expo, using a custom map implementation, category-based filtering, and an offline cache layer. Backend powered by Node.js with MongoDB for flexible location data modeling.

• Map performance on mobile requires careful clustering and lazy loading — never render all markers at once.

• Offline support is not optional for a travel app — it should be designed in from day one.

• Content quality matters more than feature quantity for discovery apps.