JONATHAN RAMALHO
Senior React Native Engineer

Jonathan Lukas de Oliveira Ramalho

Mobile products that hold up.

I build and improve React Native applications across iOS and Android, with a focus on architecture, performance, secure integrations, and practical product delivery.

Based in Curitiba, Brazil6+ years in mobileReact Native / TypeScriptOpen to remote roles

Jonathan Ramalho
RAMALHO
PERFORMANCE
95
SECURITY
92
RELIABILITY
92
ARCHITECTURE
94
INTEGRATIONS
94
NATIVE
88

What I Work On

// FOCUS_AREAS_V2.0

SYS.ARCH.01

React Native Architecture

Building mobile codebases that can evolve without making every new feature harder to ship. Establishing patterns that scale across squads while keeping high cohesion and low coupling.

Dependency InjectionState Management
SYS.PERF.02

Performance & Platform Behavior

Improving rendering, lists, navigation, and the iOS and Android details users notice when an app starts to scale — obsessing over dropped frames and memory allocations.

JSBRIDGENAT
SYS.SEC.03

Secure Product Foundations

Working with OAuth, OIDC, token refresh flows, DRM-aware playback, Firebase services, and production-ready integrations that protect user data while keeping experiences seamless.

OAuth 2.0 Flow[SECURE]
DRM Playback[ENCRYPTED]
Token Rotation[ACTIVE]

Experience

// EXECUTION_LOG // 2019—PRESENT

2022 — Present

Senior Mobile Developer

@ INVILLIA
  • React Native New Architecture migration
  • DRM-aware HLS playback
  • Mutex-based refresh token flow
  • Firebase integrations
  • Performance optimization
2020 — 2022

Senior Mobile Developer

@ PIXTER
  • iOS and Android product delivery
  • OAuth 2.0 and OIDC SSO
  • Background geolocation
  • Jest testing
  • Redux application architecture
2019 — 2020

Full-Stack Developer

@ TWOWEB DIGITAL
  • React Native products from MVP to production
  • React web applications
  • Node.js APIs
  • Ruby on Rails backend work
  • Analytics and geolocation features

Tools I Work With

// SYS_REQ — OK

ENV // MOBILE

  • React Native
  • Expo
  • iOS
  • Android
  • Swift
  • Kotlin

ENV // FRONTEND

  • React
  • Next.js
  • TypeScript
  • Redux Toolkit

ENV // BACKEND

  • Node.js
  • Ruby on Rails
  • Firebase
  • REST APIs
  • OAuth 2.0

ENV // QUALITY

  • Jest
  • Git
  • CI/CD
  • GitHub Copilot

Building a mobile product that needs to hold up?

I'm open to remote opportunities where I can help teams ship reliable React Native products, improve existing mobile systems, and take ownership of difficult implementation details.