Mobile Engineer — React Native

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 an AI-native Mobile Engineer to help build the next generation of Sekai’s mobile experience.

This role is focused primarily on React Native development. You will work on core mobile product surfaces, improve performance and quality, and help us build a fast, polished, mobile-first consumer app.

You should care deeply about user experience, move fast, and be comfortable using AI tools as part of your daily engineering workflow. The right person is product-minded, strong in ownership, and excited to work across product, design, and engineering in a fast-moving startup environment.

Experience with Android Native development is a strong plus, especially if you have worked on mobile performance, startup speed, scrolling performance, memory usage, crash rate, ANR, or low-end Android device optimization.

Responsibilities

• Build and ship React Native mobile features end-to-end across Sekai’s core consumer experience

• Work on high-impact product surfaces such as feed, discovery, creation, play experience, sharing, onboarding, retention, and user engagement

• Improve mobile app performance, stability, responsiveness, and overall product quality

• Debug and fix production issues quickly, with strong judgment around user impact and prioritization

• Collaborate closely with Product, Design, Backend, and Growth to turn product ideas into shipped mobile experiences

• Integrate React / web-based interactive content into the mobile app experience where needed

• Use analytics, logs, crash reports, and user feedback to identify and solve mobile product issues

• Use AI aggressively in day-to-day development, debugging, prototyping, testing, and iteration

• Help shape Sekai’s long-term mobile architecture as the product scales

Qualifications

• 3+ years of professional software engineering experience, ideally with mobile or consumer-facing products

• Strong hands-on experience with React Native

• Strong proficiency with TypeScript / JavaScript

• Experience shipping production mobile apps on iOS and/or Android

• Good understanding of mobile app architecture, navigation, state management, API integration, release cycles, and app store deployment

• Strong product sense and care for user experience, especially on mobile

• Able to debug issues independently and move quickly from problem discovery to shipped fix

• Highly AI-native, with strong familiarity using modern AI coding tools such as Cursor, Claude Code, Codex, or similar tools

• Strong ownership mindset and ability to drive work end-to-end

• Comfortable working in a fast-paced startup environment with ambiguity

Preferred Qualifications

• Experience with Android Native development, especially Kotlin, Java, Android SDK, or Jetpack Compose

• Experience optimizing Android performance, including startup time, scrolling performance, memory usage, crash rate, ANR, and low-end Android device performance

• Experience building or maintaining hybrid mobile architectures, including React Native + native modules, WebView integration, or native bridges

• Experience with Flutter, especially migrating from Flutter to React Native or maintaining apps across multiple mobile stacks

• Experience with mobile-first consumer products, social products, UGC platforms, gaming, entertainment, creator tools, or feed-based apps

• Experience with mobile analytics, crash reporting, and performance tools such as Firebase, Amplitude, GA4, Sentry, Datadog, Android Studio Profiler, or similar tools

• Experience at an early-stage startup or high-growth consumer company

• Strong side projects, open-source contributions, or independently shipped apps are a plus

Benefits

• Top-tier salary in the market + competitive equity

• Full health insurance

• Remote-first team

If you are excited about building at the frontier of AI, consumer social, and interactive entertainment, we would love to hear from you.

At Sekai, you will work with an AI-native team, move fast, own meaningful problems, and have the flexibility to explore new ideas from an early stage.