Principal Mobile Engineer, Platform - MetaMask

📍 World
USD 227,000-272,000 per year
SENIOR
✅ Remote

Used Tools & Technologies

LLM

Required Skills & Competences

Security @ 1 Kotlin @ 4 CI/CD @ 7 Hiring @ 6 Communication @ 7 React @ 4 Android @ 4 Debugging @ 4 FinTech @ 1 iOS @ 4 Swift @ 4 Web3 @ 1 Blockchain @ 4 AI @ 4

Details

Consensys (MetaMask) is building the Wallet Platform that powers MetaMask Mobile (iOS & Android). The Mobile Platform team treats MetaMask Mobile as a platform: enabling feature teams to ship high‑quality experiences faster by providing a secure, stable, high‑performance foundation with excellent developer experience and automated operations. The mobile apps are built primarily on React Native with native code where it matters.

Responsibilities

  • Own mobile platform architecture and define/evolve the architecture of MetaMask Mobile (React Native + native).
  • Make tradeoffs between JS/TS, React Native, and native code to balance performance, reliability, and iteration speed.
  • Design and steward core platform systems (OTA, analytics foundations, data/persistence, auth, VPN/geolocation primitives).
  • Lead high‑impact, cross‑team initiatives, including large upgrades and migrations (React Native, navigation, foundational libraries).
  • Drive 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: tooling, local dev ergonomics, build/test pipelines, and release workflows; push toward push‑button releases and reduced operational toil.
  • Integrate AI/LLMs into workflows to scaffold code, enforce patterns, and improve testing and feedback loops; help define safe and effective usage of AI for tickets and platform patterns.
  • Define and evolve metrics and dashboards for performance, stability, and efficiency; provide tools and guidance so feature teams can self‑diagnose and own regressions.
  • Mentor Senior/Staff engineers, influence technical direction across Wallet Platform and MetaMask, lead design and architecture reviews, and help shape hiring and technical culture for a lean, senior, high‑leverage 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 between RN and native.
  • 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, with strong architecture and communication skills.
  • Proven ability to influence without authority, set technical direction, mentor senior engineers, and raise the engineering bar.
  • Experience or strong interest in using AI/LLMs to improve developer productivity and code quality.

Additional notes from the posting:

  • Background checks (employment, education, criminal record) are required for employment.
  • Bonus: experience with crypto / Web3, wallets, fintech, security‑sensitive apps; open‑source contributions in React Native or mobile tooling; optimizing for emerging markets / low‑end devices; experience in fully remote, globally distributed teams.
  • The salary range for US‑based candidates: $227,000—$272,000 USD (not including bonus, equity or other benefits).

Benefits

  • Competitive benefits package
  • Equity
  • Continuous learning & development (Consensys Advance Program, Coursera access)
  • Unlimited vacation/holidays and company “zero productivity” days
  • Flexible working arrangements and remote‑first, globally distributed team
  • Recognition in the blockchain and Web3 ecosystem