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@jmstechnologiesinc

Jms Technologies, Inc

Senior Full Stack Developer | React.js · React Native · Node.js · TypeScript · Python/Django · Docker/Kubernetes | Scalable Web & Mobile Apps

👋 Hi, I'm Joel Maria

💻 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

🏆 Career Highlights

  • 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 modules50M+ 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.

💡 Why Work With Me

✔ 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

🚀 Featured Projects

  • 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

🛠️ Tech Stack

🏅 Achievements

  • 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

📦 My Open Source Library

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.

⚙️ Key Features

  • 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.)

🌍 Open Source Contributions

I’ve actively contributed to well-known open source projects that power millions of apps worldwide:

📬 Connect with Me

Platform Contact
🔗 LinkedIn joel-maria
✉️ Email joelmsanto@gmail.com
📱 WhatsApp +1 978 771 2261

🎯 Free 30-Minute Consultation Available

Popular repositories Loading

  1. react-native-components react-native-components Public

    A lightweight, modular UI kit & utility library for React Native on Android, iOS & Web

    JavaScript 1 1

  2. Reproductor Reproductor Public

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  3. react-native-paper react-native-paper Public

    Forked from callstack/react-native-paper

    Material Design for React Native (Android & iOS)

    TypeScript 1

  4. material-tokens material-tokens Public

    Forked from material-foundation/material-tokens

    Material Design DSP

    CSS 1

  5. react-navigation react-navigation Public

    Forked from react-navigation/react-navigation

    Routing and navigation for your React Native apps

    TypeScript 1

  6. react-native-google-places-autocomplete react-native-google-places-autocomplete Public

    Forked from FaridSafi/react-native-google-places-autocomplete

    Customizable Google Places autocomplete component for iOS and Android React-Native apps

    JavaScript 1

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