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Youssef Shalaby

@youssefshalaby

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React Native Developer at Based On Tech, scaling FitRack to 40,000+ monthly active users across iOS and Android.

Egypt

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At Based On Tech, I developed and scaled FitRack, an AI-driven health and fitness platform serving over 40,000 monthly active users across iOS and Android. I built production workflows for AI vision and audio features and integrated payment systems with localized pricing.

As a freelance mobile engineer, I shipped Tova, a multi-inventory travel marketplace, and built CeleMeet’s real-time video calling and chat. At Nexus, I engineered Maweedi, a bilingual appointment-booking platform with RTL support.

Experience

Work history, roles, and key accomplishments

Current

React Native Developer

Current

Based On Tech

Mar 2025 - Present (1 year 7 months)

Developed and scaled FitRack, an AI-driven health and fitness platform serving over 40,000 monthly active users across iOS and Android. Architected monetization and paywall systems integrating Apple IAP, Google Pay, and EasyKash via RevenueCat.

React Native Expo TypeScript Zustand Tanstack Query RevenueCat HealthKit Google Health Connect AI Machine Learning Mobile Development

Current

Lead Mobile & Full-Stack Engineer

Current

Freelance Mobile Engineer

Jan 2024 - Present (2 years 9 months)

Architected and shipped an end-to-end multi-category booking application on Google Play, designing a polymorphic schema unifying hotels, villas, and vehicle rentals. Engineered asset and dependency optimizations, reducing the production React Native bundle size to 30MB.

React Native React Laravel PHP MySQL EasyKash SQL Haversine WebRTC GetStream SDK Apple IAP Zustand Tanstack Query Axios Expo Routers

React Native Developer

Nexus

Dec 2024 - Mar 2025 (3 months)

Engineered Maweedi, a high-concurrency bilingual (Arabic/English) appointment-booking platform featuring complete RTL layout support, multi-service selection, and dynamic price/duration aggregation wizards. Implemented a 3-layer architecture separating network calls, server caching, and UI components.