Facundo Ortiz
React Native Developer · Expo & EAS · TypeScript · Fintech ·
Ready for work
Facundo is ready for their next project!
Sole mobile developer on a confidential greenfield React Native/Expo
fintech app, built from scratch across 12+ screens.
Architected the full mobile layer: Expo Router with protected routes,
biometric authentication, and secure local storage. Built a custom Expo
config plugin to integrate a KYC identity verification SDK. Implemented
Web3Auth key management and Solana transaction signing for minting
compressed NFTs, with an encrypted local cache layer to optimize repeated
crypto operations. The app connects to the Solana blockchain to both read
and write data — balances, transactions, and on-chain asset state. Managed
server state with React Query, global state with React Context and custom
hooks, and integrated 6+ third-party services including PDF handling,
Lottie animations, i18n, and Zod validation. Deployed to both App Store
and Google Play via EAS.
This is a private project currently in final stages before launch —
screenshots available upon request once in production.
1
28
Ongoing work on WhatSong (what-song.com (http://what-song.com)), a worldwide film and TV
soundtrack discovery platform with 50k+ daily users.
Delivered a full design system incrementally in production using Tailwind
config customization and reusable components. Implemented dynamic SSR
routes for artist, movie, and song pages, and optimized SEO, image
loading, and lazy loading across 15+ routes. Integrated Stripe payments
and A/B tested ad providers (Playwire vs NitroPay) to optimize revenue.
Delivered 10+ NestJS endpoints and GraphQL queries, resolved database
performance issues and query timeouts on a high-traffic PostgreSQL
production system, and stabilized a Redis caching layer.
1
21
Sole React Native developer on EmpowerLine Malawi, a legal aid app
for survivors of gender-based violence in Malawi, built for the
Gender and Justice Unit (GJU) and published on both App Store and
Google Play.
The app covers 8+ screens: 24/7 AI legal chatbot, civil rights
information, multilingual search in English and local languages,
callable emergency contacts, and PDF downloads. The chatbot was
engineered with a session-based prompt architecture using the
Gemini API, designed around the nonprofit's free tier constraints.
Launched at a UN-aligned webinar coinciding with the 16 Days of
Activism against Gender-Based Violence. Covered by AfricaBrief.
Link: https://africabrief.substack.com/p/gju-launches-mobile-app-to-address
1
18
Gym Tracker
1
0