Principal Mobile Engineer

As a Principal Engineer, you will

• •Own mobile platform architecture
• •Define and evolve the architecture of MetaMask Mobile (React Native + native).
• •Make key tradeoffs between JS/TS, RN, and native to balance performance, reliability, and iteration speed.
• •Design and steward core platform systems (e.g., OTA, analytics foundations, data/persistence, auth, VPN/geolocation primitives).
• •Lead high‑impact, cross‑team initiatives.
• •Drive large upgrades and migrations (React Native, navigation, foundational libraries).
• •Lead structural performance and stability work: startup time, crash rate, ANRs, jank, memory usage, bundle size.
• •Break large efforts into incremental, shippable milestones with clear impact.
• •Elevate developer experience & automation.
• •Improve tooling, local dev ergonomics, build/test pipelines, and release workflows for all mobile engineers.
• •Establish clear patterns for navigation, state management, and platform primitives to reduce cognitive load.
• •Push towards “push‑button” releases and reduced operational toil via automation.
• •Build an AI‑enabled platform.
• •Integrate AI/LLMs into workflows to scaffold code, enforce patterns, and improve testing and feedback loops.
• •Help define how tickets and platform patterns leverage AI safely and effectively.
• •Drive app health & performance culture.
• •Define and evolve metrics and dashboards for performance, stability, and efficiency.
• •Provide tools and guidance so feature teams can self‑diagnose and own regressions.
• •Champion shared accountability for app health across all teams contributing to mobile.
• •Multiply impact through leadership.
• •Mentor Senior/Staff engineers and influence technical direction across Wallet Platform and MetaMask.
• •Lead design and architecture reviews for critical platform areas.
• •Help shape hiring and technical culture for a lean, senior, high‑leverage Mobile Platform team.