HI, I’M

JONATHAN RAMALHO

View Experience → (under construction)
I BUILDhigh-performance apps

ABOUT ME

Senior React Native Engineer focused on secure, high-performance, mobile systems. GitHub Copilot Certified. I build fast, scalable, and secure products, seeking impactful companies in fintech, health, and productivity sectors.

TECH STACK

React Native
Mobile Architecture
New Architecture (Fabric/TurboModules)
AI-assisted Dev (Copilot Certified)
Security (SSL pinning, token refresh mutex)
Performance (FlashList, Hermes tuning)

HIGHLIGHTED PROJECTS

Vivae (Invillia)

Lead mobile developer of the Vivae platform, RN 0.74 → 0.81 upgrade with New Architecture, secure mutex-based token refresh, Firebase integrations, and HLS video streaming, with DRM awareness.

Porto Seguro Carro Fácil (Pixter)

Development of core features, secure OAuth/OIDC login, real-time location system, performance tuning, and end-to-end test coverage using Jest.

React NativeStyled Components

Video AI Cuts (Side Project)

Currently building — AI-powered pipeline that auto-generates video clips using Whisper, embeddings, reranking, and ffmpeg.

Node.jsFFmpeg →

RN Procedural UI (Open Source)

Currently building — Experimental React Native library for procedural UI using Skia, animations, and declarative patterns.

React NativeSkia