09/28/2026 updated
100 % available
Senior React Native Engineer | Expo | TypeScript | iOS & Android
Bucharest, Romania
Only remote
Bachelor's Degree, Computer ScienceAbout me
Senior React Native / Mobile Engineer with 9+ years of experience building cross-platform iOS and Android applications and 14+ years in software development. Specialized in React Native, TypeScript, Expo, Redux, TanStack Query, GraphQL, REST APIs.
Mobile Application DevelopmentNode.jsTypeScriptGoogle FirebaseExpo.ioReact Native
React Native & Cross-Platform Mobile Development
Over 9 years of experience delivering production-ready cross-platform iOS and Android applications using React Native, Expo SDK, and TypeScript, including major version upgrades, reusable component architecture, and performance optimisation.
TypeScript & API-Driven Development
Extensive use of TypeScript and JavaScript for building API-driven mobile experiences with REST and GraphQL, including authentication flows, data fetching, caching, error handling, and state management using Redux and TanStack Query.
Mobile Quality, Testing & Delivery
Hands-on experience with Sentry, Firebase Crashlytics, Jest, React Native Testing Library, EAS Build, EAS Submit, EAS Update, Fastlane, and GitHub Actions for end-to-end mobile delivery, App Store and Google Play releases, and production issue resolution.
Native Development Knowledge
Working knowledge of Objective-C, Java, Swift, and Kotlin to support React Native integrations and platform-specific requirements on both iOS and Android codebases.
Mobile Architecture & Engineering
Design and implementation of scalable mobile architecture patterns, reusable components, FlatList optimisation, debugging, and production issue investigation across multiple client projects.
Mobile Capabilities & Push Notifications
Implementation of push notifications, deep linking, Universal Links, Android App Links, OTA updates, App Store Connect, and Google Play Console management.
AI-Assisted Development
Practical use of AI tools including GitHub Copilot, Claude, and OpenAI Codex to support and accelerate development workflows.
Agile Workflow & Remote Collaboration
Experienced in Git, Agile/Scrum methodologies, code reviews, and remote B2B collaboration within distributed teams across EU, UK, and US time zones.
Full Stack & Web Development
Earlier experience in full stack web and mobile development using Node.js, AngularJS, JavaScript, MongoDB, HTML5, CSS3, and Bootstrap for clients across healthcare, public-sector, and marketplace services.
Over 9 years of experience delivering production-ready cross-platform iOS and Android applications using React Native, Expo SDK, and TypeScript, including major version upgrades, reusable component architecture, and performance optimisation.
TypeScript & API-Driven Development
Extensive use of TypeScript and JavaScript for building API-driven mobile experiences with REST and GraphQL, including authentication flows, data fetching, caching, error handling, and state management using Redux and TanStack Query.
Mobile Quality, Testing & Delivery
Hands-on experience with Sentry, Firebase Crashlytics, Jest, React Native Testing Library, EAS Build, EAS Submit, EAS Update, Fastlane, and GitHub Actions for end-to-end mobile delivery, App Store and Google Play releases, and production issue resolution.
Native Development Knowledge
Working knowledge of Objective-C, Java, Swift, and Kotlin to support React Native integrations and platform-specific requirements on both iOS and Android codebases.
Mobile Architecture & Engineering
Design and implementation of scalable mobile architecture patterns, reusable components, FlatList optimisation, debugging, and production issue investigation across multiple client projects.
Mobile Capabilities & Push Notifications
Implementation of push notifications, deep linking, Universal Links, Android App Links, OTA updates, App Store Connect, and Google Play Console management.
AI-Assisted Development
Practical use of AI tools including GitHub Copilot, Claude, and OpenAI Codex to support and accelerate development workflows.
Agile Workflow & Remote Collaboration
Experienced in Git, Agile/Scrum methodologies, code reviews, and remote B2B collaboration within distributed teams across EU, UK, and US time zones.
Full Stack & Web Development
Earlier experience in full stack web and mobile development using Node.js, AngularJS, JavaScript, MongoDB, HTML5, CSS3, and Bootstrap for clients across healthcare, public-sector, and marketplace services.
Experience
Professional experience10+ years
Freelancer since2020
Languages
EnglishFluentFrenchBasic knowledgeRomanianNative speaker
Project history
Delivered and maintained production React Native applications for iOS and Android across sports, construction, SaaS, media, entertainment, and healthcare, including products used by 2.5M+ users. Contributed to mobile products for international brands including Paris Saint-Germain, Chelsea FC, Newcastle United, Rangers FC, Luton Town FC, Bunte.de, and BPS Software. Led mobile feature delivery from requirements clarification and technical planning through release and production support. Mentored junior and mid-level engineers through code reviews and React Native/TypeScript best practices. Built API-driven mobile experiences using REST and GraphQL. Improved crash-free users from 98% to 99.98% on iOS and from 97% to 99.7% on Android through Sentry and Firebase Crashlytics investigation and hotfix releases.
Developed cross-platform React Native applications for entertainment and healthcare clients, integrating REST APIs, authentication flows, application state management, and platform-specific functionality. Worked with native iOS and Android codebases using Objective-C and Java to support React Native integrations. Collaborated with distributed product, design, backend, and QA teams; supported debugging, testing, App Store/Google Play release preparation, and production issue resolution.
Built web and mobile applications for Norwegian clients across healthcare, public-sector, and marketplace/rental services. Developed a web and mobile platform supporting people living with Alzheimer's and a mobile application for renting parking spaces. Worked across frontend, backend, and mobile development using Node.js, AngularJS, JavaScript, MongoDB, and later React Native.