React Native Mobile Engineer — Maps & Performance

Mystro; San Francisco (CA); On-site; USD 155,000 - 205,000; Full time

Benefits offered by this job

Equity on offer

In-office role

Job summary

Mystro in San Francisco, CA is seeking an engineer to join a small team building a cross-platform mobile app for gig work. You’ll contribute to performance, UI, and geospatial features, collaborating with design and product management.

You’ll work with React Native, Expo, TypeScript, Redux Toolkit, and native modules, shipping impactful features for a growing user base. This is a hands-on, in-office role with equity on offer.

Qualifications

• Building and maintaining mobile apps.
• Strong understanding of the React component lifecycle.
• Our stack: React Native with Expo and TypeScript, Redux Toolkit, Reanimated, custom Swift and Kotlin native modules.
• Rideshare, gig economy, mapping, or navigation apps.
• Mobile app backend services and/or native app development.
• Third-party app tools including analytics (Amplitude), bug tracking (Sentry), billing (RevenueCat), etc.
• Reverse engineering.

Responsibilities

• Improve app performance: reduce crash and app-not-responding rates, speed up slow hot starts, and keep the app reliable over long drives.
• Work directly with our designer and product manager to ship new features.
• Build performant React Native UIs.
• Analyze geospatial data to provide insights and build map visualizations.
• Intercept and analyze network traffic (mitmproxy, Charles, Proxyman).
• Diagnose issues and monitor performance using crash reporting and analytics tools (Sentry, Amplitude).
• Work with rooted or jailbroken mobile devices and runtime instrumentation (Magisk, Frida).

Skills

React Native

TypeScript

Expo

Redux Toolkit

Map visualizations

Geospatial data analysis

UI performance

Tools

Sentry

Amplitude

mitmproxy

Charles

Proxyman

Magisk

Frida

Job description

Mystro in San Francisco, CA is seeking an engineer to join a small team building a cross-platform mobile app for gig work. You’ll contribute to performance, UI, and geospatial features, collaborating with design and product management.

You’ll work with React Native, Expo, TypeScript, Redux Toolkit, and native modules, shipping impactful features for a growing user base. This is a hands-on, in-office role with equity on offer.