Senior Android Engineer

Sekai is building the TikTok for mini apps — an AI-driven consumer platform where people create, remix, share, and play interactive content instantly. We are a Series A company backed by Khosla, a16z, Mayfield, and A*, with $30M raised to date. We are remote-first across all positions and are looking for ambitious, AI-native builders who want to help shape the next generation of consumer social products. Here are Sekai’s download links: Android: https://play.google.com/store/apps/details?id=chat.sekai.app&hl=en_US IOS: https://apps.apple.com/us/app/sekai-create-remix-play/id6504506653 About the Role We are looking for a Senior Android Engineer to build the native Android foundation for Sekai’s mobile product. This is an Android-first role focused on the core app shell, native platform architecture, product quality, release reliability, and hybrid integration with React Native, Flutter, and web-based experiences. The right person has shipped real consumer Android apps, understands the Android ecosystem deeply, and can make pragmatic architecture decisions in a fast-moving startup environment. You should be comfortable working close to the OS while partnering closely with Product, Design, Backend, and Mobile teams to build a fast, polished, mobile-first consumer experience. Responsibilities - Build and own Sekai’s native Android foundation using Kotlin, Android SDK, and modern Android architecture - Design and improve the Android app shell, navigation, lifecycle handling, session management, permissions, push notifications, deeplinks, and release workflows - Create clean integration points for product modules built in native Android, React Native, Flutter, or WebView - Partner with Product, Design, Backend, and Mobile engineers to ship high-quality consumer mobile experiences - Improve Android app reliability, responsiveness, maintainability, and production quality across real-world devices - Build observability and debugging workflows for crashes, app health, release quality, and user-impacting issues - Define engineering patterns for native modules, cross-stack communication, hybrid screen ownership, testing, CI/CD, and rollout - Use modern AI development tools to move faster while maintaining strong engineering quality Qualifications - 5+ years of professional Android engineering experience - Strong hands-on experience with Kotlin, Android SDK, and production Android app development - Experience building or owning major parts of a consumer-facing Android app - Strong understanding of Android architecture, app lifecycle, navigation, concurrency, networking, persistence, dependency management, and modularization - Experience building high-quality mobile UI using Jetpack Compose and/or the traditional Android View system - Strong product sense and care for mobile user experience, polish, responsiveness, and reliability - Ability to make independent architecture decisions and clearly explain technical tradeoffs - Strong ownership mindset and ability to drive work end-to-end in a fast-paced environment - Comfortable collaborating closely with Product, Design, Backend, Mobile, and Growth teams Preferred Qualifications - Experience leading or helping lead a team to build a mobile app from 0 to 1 - Experience working in a startup or high-growth consumer product environment - Experience with React Native, including native modules, bridges, or hybrid mobile architecture - Experience integrating Flutter or WebView-based modules into native Android apps - Experience with Android performance profiling, startup optimization, memory management, UI responsiveness, crash reduction, or app health monitoring - Experience with mobile observability and analytics tools such as Firebase Crashlytics, Sentry, Datadog, Amplitude, GA4, or similar tools - Experience with feed-based, social, entertainment, creator, gaming, UGC, marketplace, or other high-engagement consumer products - Experience with Gradle, CI/CD, staged rollouts, Play Console,