Open to opportunities

Diego Rios

@diegorios1

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Senior Mobile Engineer building scalable iOS/Android apps with React Native, Flutter, and native modules.

Portugal

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What I'm looking for

I’m looking for a senior mobile role where I can own architecture, ship reliable iOS/Android releases, optimize performance, and lead through mentoring and code reviews.

I’m a Senior Mobile Engineer with 8+ years of experience building scalable iOS and Android applications. I focus on mobile architecture, native module development, performance optimization, CI/CD automation, and technical leadership across React Native, Flutter, Kotlin, Swift, Java, and TypeScript.

I’ve delivered production apps used by thousands of users in education, media, telecom, and food delivery. I reduced app bundle size by 80% (25MB → 5MB) via a React Native to Native migration, and I built custom offline-first native modules using Kotlin and Swift.

I thrive in teams where engineering quality and release reliability matter. I automate release pipelines with Fastlane (saving 1+ hour per deployment cycle), and I’ve mentored mobile developers through onboarding, code reviews, and hiring and technical planning.

Experience

Work history, roles, and key accomplishments

Current

Mobile Developer

Current

Republic Europe

Sep 2025 - Present (10 months)

Developing and maintaining cross-platform iOS and Android mobile applications. Contributing to architecture decisions, code quality, and release processes while collaborating with cross-functional teams.

Mobile Developer

Impresa

Aug 2022 - Aug 2025 (3 years)

Owned and maintained native modules integrating Kotlin and Swift into React Native applications. Automated deployments with Fastlane and streamlined App Store and Google Play release pipelines.

React Native Kotlin Swift Fastlane CI CD App Store Deployment

Mobile Developer & Tech Lead

Aurum Software

Feb 2021 - Aug 2022 (1 year 6 months)

Led and mentored two mobile developers through onboarding, code reviews, and technical guidance. Participated in hiring interviews, architecture discussions, and technical planning while contributing to React Native and native iOS/Android development.

React Native iOS Development Android Development Mentoring Code Review Technical Leadership

Mobile Developer

Focus Concursos

Sep 2019 - Aug 2022 (2 years 11 months)

Designed and implemented Flutter application architecture using Bloc and delivered scalable offline-first experiences. Built custom offline plugins using Swift and Kotlin and managed the mobile lifecycle through App Store and Google Play releases.

Flutter BLoC Swift Kotlin Offline First App Store Deployment

Mobile Developer

WeDev Tecnologia

Sep 2020 - Jan 2021 (4 months)

Developed and maintained React Native applications. Delivered features and bug fixes in Agile team environments.

React Native Agile Scrum

Mobile Developer

Compasso

Nov 2018 - Sep 2020 (1 year 10 months)

Built a Flutter application from scratch and published it on Google Play. Developed apps using Kotlin and Swift, led a React Native to native migration reducing app size by 80%, and handled performance optimization and production release management.

Flutter Kotlin Swift React Native Performance Optimization Release Management

Full Stack Developer

BeeLabs

Jun 2018 - Oct 2018 (4 months)

Worked across front-end, back-end, and mobile development using ReactJS, Redux, Ruby on Rails, and React Native. Delivered contributions across multiple parts of the application stack.

ReactJS Redux Ruby on Rails React Native