Open to opportunities

Everaldo Rosa de Souza Junior

@everaldorosadesouzaj

Senior React Native engineer building scalable, high‑performance mobile apps with Expo, TypeScript and native integrations.

Brazil

Message

What I'm looking for

I'm seeking senior mobile engineering or tech lead roles where I can own architecture, mentor teams, build high-performance offline-first apps, integrate native modules, and collaborate closely with Product and Design in a growth-oriented company.

I am a Senior React Native engineer with eight years building and scaling mobile apps using React Native, Expo, TypeScript, and native modules. I designed architectures, led large migrations (including an iOS-to-React Native migration), and delivered measurable performance gains such as a +54% FPS improvement on a core feature.

I founded and scaled RevisApp—an education platform with 3M+ downloads and 90K+ MAU—and have led teams as Tech Lead, mentoring developers and driving CI/CD, automated testing, and offline-first solutions. I collaborate closely with Product and Design to deliver pixel-perfect UI/UX and robust cross-platform experiences.

Experience

Work history, roles, and key accomplishments

Current

Senior React Native Engineer

Current

Whitespectre

Aug 2022 - Present (3 years 1 month)

Designed and owned architecture and core features of React Native/Expo apps across food, health, and communication verticals, improving a core feature's FPS by 54%. Led migration of a large iOS app to React Native with integrated AI and native features and implemented native modules in Swift, Objective-C, Kotlin, and Go while maintaining CI/CD pipelines.

React Native Expo TypeScript Swift Kotlin Performance Optimization Bitrise CI CD

Current

Founder

Current

RevisApp

Mar 2017 - Present (8 years 6 months)

Built and scaled RevisApp to 3M+ downloads, 90K+ MAU and a 4.5 store rating, delivering an offline-first mobile experience using Realm and TanStack Query. Maintained fullstack backend on Node.js and GCP and ensured reliability via automated CI/CD and monitoring.

React Native Next.js TypeScript Realm Node PostgreSQL GCP CI CD Sentry

Tech Lead | Senior React Native Engineer

Wiser Educação

Jul 2020 - Aug 2022 (2 years 1 month)

Led a team of 4 on the WiseUp Online mobile app (300K+ users), overseeing feature delivery, code reviews, testing, and quality standards. Directed migration from JavaScript/class components to TypeScript and functional components to improve maintainability.