Responsibilities
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.