I am a Software Engineer based in the Greater New York Area, specialized in building scalable backend systems and high-performance mobile applications. My experience spans Python, Ruby, and TypeScript, with a current focus on architecting educational infrastructure and novel social platforms.
I am currently leading development on KODA, an LMS platform for scholastic esports, and also Ledes, a mobile Category-Selective Microblogging app.
| Category | Tools |
|---|---|
| Languages | Python, Ruby, TypeScript, JavaScript (ES6+), HTML5, CSS3 |
| Mobile & Frontend | React Native (Expo), React 19, Tailwind CSS, Vite |
| Backend & DB | Node.js (Express 5), PostgreSQL, Firebase Firestore |
| AI & Cloud | Claude, Google Gemini, Firebase Auth/Hosting, Vercel |
| Security & DevOps | JWT, bcrypt, GitHub Actions (CI/CD), FERPA/COPPA Compliance |
Built with React 19, TypeScript, & Firebase An infrastructure layer for K–12 esports programs, currently targeting 700 Title I schools in NYC. Secured funding and a grant from the NYC Mayor's Office.
- 📚 Stack: React 19, TypeScript, Firebase (Firestore/Auth/Hosting), Google Gemini 2.0 Flash
- 🎀 Features: Role-based access (Student/Coach/Recruiter), Real-time bracket engine, and KODA Coach (AI chatbot)
- 🔒 Compliance: Built to FERPA and COPPA standards for safe student-recruiter interaction
Built with React Native & Node.js A social mobile app featuring a novel "lede" system that allows users to subscribe to specific content buckets (e.g., Tech vs. Sports) from creators.
- 📚 Stack: React Native 0.81 (Expo), TypeScript 5.9, Node.js (Express 5), PostgreSQL
- 🎀 Features: Category-selective following, gesture-driven UI (Reanimated), and JWT-based silent auth
- 🛠️ Engineering: Implemented comprehensive validation, optimistic UI updates, and full-text search
- Real-time Systems: Engineered a bracket generation engine supporting single/double elimination and round-robin formats.
- AI Integration: Integrated Google Gemini 2.0 Flash and Claude for context-aware coaching and research assistance.
- Security First: Designed role-gated access control systems and secure messaging inboxes with guardian-review gates for minors.
- Agile Delivery: Delivered 30+ Jira tickets across 12 sprints within a 3-person Agile/Scrum team for mobile development.
- Location: New York, NY
- GitHub: @mr-martinsosa
- LinkedIn: mr-martinsosa
Important
My most significant recent contributions (700+ school pilot infrastructure and proprietary mobile frameworks) are currently in private repositories.
- KODA: 117+ PRs merged in under 60 days, architecting a FERPA-compliant LMS.
- Ledes: Built an 18-endpoint RESTful API with JWT auth and category-selective following.
- Deployment: CI/CD pipelines automated via GitHub Actions to Firebase Hosting.