💻 Full Stack & Mobile Engineer | JavaScript • React • React Native • Node.js • Docker • Kubernetes
🚀 16+ years of experience building scalable FinTech, transportation, and enterprise apps
🌍 Former AI Mobile App Developer at Bank of America, Fidelity, TD Ameritrade, and Team Lead at U.S. Bank
📈 Specialized in Web, Mobile & Backend Development with a focus on AI-driven features, cloud, and geolocation systems
-
Spotify – Senior Software Engineer, React Native
Built Spotify for Authors for 500M+ users and optimized Design System & GraphQL APIs for speed and accessibility. -
U.S. Bank – React Native & Full Stack Team Lead
Led 30+ engineers redesigning iOS, Android & Web apps → 20M+ downloads, 5⭐ ratings, #1 in Keynova Group Q1 2024. -
Bank of America – React Native & Backend Developer
Built biometric login, mobile deposits, stock trading modules → 50M+ downloads, 46M active users, 4.8⭐ rating. -
Fidelity Investments – Senior Software Engineer
Transformed legacy Swift into cross-platform, fraud detection dashboards, and real-time trading features. -
Grax.com – Full Stack Developer
Scaled SaaS to 100M+ API calls daily, managing petabytes of data with Node.js + React.js → $20M annual revenue.
✔ Tailored Approach → solutions customized to your project & budget
✔ Agile Workflow → milestones, transparency, regular updates
✔ High-Quality Development → testing, optimization, security
✔ Proven Track Record → enterprise apps, SaaS, AI, scalable platforms
- U.S. Bank Voice Assistant → Spanish NLP banking assistant → $7.06B revenue, 20M+ downloads
- Ride-Hailing Platform → Real-time fleet tracking, Kafka alerts, PostGIS geofencing
- Fidelity Investments → Mobile trading app with advanced charting & fraud detection
- Bank of America → Mobile check deposit, account management, secure payments for 57M+ users
- TD Ameritrade → Cross-platform fintech trading app (iOS, Android, Web)
- Multi-Vendor Marketplace → Firebase serverless functions for payments, analytics & real-time ops
- Built 90+ reusable React Native components with Storybook
- Maintained 80%+ test coverage with Jest, Detox, E2E
- Architected serverless & microservices backends with Firebase, Node.js, and Kubernetes
- Integrated Stripe payments, real-time geolocation, AI/ML, and secure APIs
React Native Components
A lightweight, modular UI kit & utility library for React Native (Android, iOS & Web). Built to accelerate development with reusable components, theming, localization, map & geolocation support, and real-world performance optimizations.
- Modular exports — import only what you need to keep bundle size minimal
- Theming & localization utilities included
- Map & geolocation components: markers, tooltips, heatmaps, etc.
- Comprehensive helper utilities (deep linking, permissions, image helpers, etc.)
I’ve actively contributed to well-known open source projects that power millions of apps worldwide:
- 🌀 React Native Paper → Bug fixes, documentation improvements & feature enhancements
- 🔥 Firebase JS SDK → Utilities, testing coverage, and Node.js integrations
- ⚡ React Native Mapbox Navigation → Performance improvements on core utilities
Platform | Contact |
---|---|
joel-maria | |
joelmsanto@gmail.com | |
+1 978 771 2261 |
🎯 Free 30-Minute Consultation Available