Summary: Scrambly is seeking a skilled React Native Engineer to build and scale their mobile app for iOS and Android, focusing on robust, performant TypeScript code and collaborative problem-solving within a modern stack. Highlights: 1. High-impact role working with a modern React Native stack. 2. Collaborative environment with strong growth culture and knowledge sharing. 3. Opportunity to impact millions of users globally. **About the Role:** **Scrambly** is looking for a skilled **React Native Engineer** to help build and scale the Scrambly mobile app for iOS and Android. In this role, you will own the end\-to\-end implementation of key features for a platform serving millions of users globally. You will be writing robust, performant TypeScript code and collaborating with product teams to solve complex challenges. This is a high\-impact role where you will work with a modern React Native stack, aiming to keep our app fast, reliable, and easy to maintain. **You will focus on:** * **Feature Delivery:** Building high\-performance, user\-centric mobile features for iOS and Android. * **Code Quality:** Writing clean, testable TypeScript code and actively participating in code reviews. * **Performance:** Identifying bottlenecks (app size, re\-renders, startup time) and implementing fixes. * **Collaboration:** Working directly with Backend, QA, and Product teams to clarify requirements and deliver seamless UX. * **Growth:** Contributing to architectural discussions and learning best practices from senior engineers. **Key Responsibilities:** * **Design \& Implementation** + Develop and maintain cross\-platform applications using React Native and TypeScript. + Build reusable UI components and performant lists (FlashList/FlatList) that adhere to design specs. + Integrate mobile apps with backend services via RESTful APIs and WebSockets. + Debug platform\-specific issues using Xcode and Android Studio, writing native modules (Swift/Kotlin) when necessary. * **Engineering Standards** + Contribute to the codebase's health by fixing technical debt and improving test coverage. + Participate in architectural discussions, offering input on state management and navigation patterns. + Review peer code to ensure it meets our standards for readability and maintainability. * **Performance \& Reliability** + Monitor production crashes (using tools like Sentry/Crashlytics) and proactively fix stability issues. + Optimize app performance, focusing on frame rates, memory usage, and battery consumption. + Assist in maintaining CI/CD pipelines to ensure smooth releases to the App Store and Google Play. **Requirements:** * 3\+ years of professional software engineering experience, with at least 2 years focused on React Native. * Strong proficiency in TypeScript and the React Native ecosystem (CLI, Hermes, debugging tools). * Good understanding of the iOS and Android build systems (Gradle, Pods, signing/provisioning). * Ability to read native code (Swift/Kotlin) to debug issues. * Familiarity with modern patterns (Functional Components, Hooks) and state management (Redux Toolkit, Zustand, or TanStack Query). * Experience writing unit tests (Jest) and familiarity with E2E testing concepts. * Ability to explain technical constraints to non\-technical stakeholders clearly. * English**:** B2, written and spoken; ability to work in a team and communicate clearly in English. **Nice to Have:** * Experience launching and maintaining a B2C app with 100k\+ MAU. * Hands\-on experience writing Native Modules or JSI/TurboModules from scratch. * Familiarity with mobile analytics (Segment, Amplitude) and A/B testing implementation. * Experience with Maestro/Appium for automation. * Knowledge of backend fundamentals (Node.js) to debug API integrations effectively. * Experience with Web development (ReactJS, NextJS) **We Offer:** * **Scale:** Your code will impact millions of users globally, where performance optimizations translate to immediate value. * **Modern Stack:** Work with the latest React Native tools without being bogged down by legacy spaghetti code. * **Growth Culture:** A collaborative environment with code reviews and knowledge sharing \- we value the best idea, regardless of title. * **Impact:** A fast\-paced environment where you can see your features go live quickly.