About the role:

ConsenSys is a market-leading blockchain technology company building Ethereum blockchain infrastructure and applications for new economic systems that are more open, efficient, and secure.

As a Principal Engineer at MetaMask, you will own the architecture and long-term technical direction of MetaMask Mobile — one of the most widely used crypto wallets in the world. You'll lead high-impact, cross-team initiatives and multiply your impact through technical leadership and mentorship across a lean, senior, high-leverage Mobile Platform team.

Responsibilities:

📍Own mobile platform architecture: define and evolve the architecture of MetaMask Mobile (React Native + native), making 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 design and architecture reviews for critical platform areas. 📍Drive large upgrades and migrations (React Native, navigation, foundational libraries). 📍Lead structural performance and stability work: startup time, crash rate, ANRs, jank, memory usage, and bundle size. 📍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. 📍Integrate AI/LLMs into workflows to scaffold code, enforce patterns, and improve testing and feedback loops. 📍Define and evolve metrics and dashboards for performance, stability, and efficiency. 📍Mentor Senior/Staff engineers and influence technical direction across Wallet Platform and MetaMask. 📍Help shape hiring and technical culture for the Mobile Platform team.

Requirements:

📍10+ years building and scaling mobile apps, including ownership of large, production React Native or hybrid mobile platforms. 📍Prior Staff/Principal-level impact: leading complex, cross-team technical initiatives. 📍Deep expertise with React Native in production: architecture, performance, debugging, and bridging. 📍Solid experience with native iOS (Swift/SwiftUI) and/or Android (Kotlin/Jetpack), including native modules and performance tuning. 📍Strong understanding of mobile CI/CD, release engineering, and OTA systems. 📍Track record building internal platforms, shared libraries, or tooling for other engineers. 📍Comfort operating in ambiguity and designing durable, reusable solutions. 📍Proven ability to influence without authority, set technical direction, and raise the engineering bar. 📍Experience mentoring senior engineers and shaping technical culture. 📍Experience or strong interest in using AI/LLMs to improve developer productivity and code quality.

Nice-to-have: 📍Experience with crypto / Web3, wallets, fintech, or other security-sensitive apps. 📍Contributions to open-source in React Native, mobile, performance, or tooling. 📍Experience optimizing apps for emerging markets or low-end devices. 📍Background in fully remote, globally distributed teams.

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