Principal Mobile Engineer, Platform - MetaMask

reputed company is the leading blockchain and reputed company software company founded by Joe Lubin, CEO of reputed company and Co-Founder of Ethereum. Since 2014, reputed company has been at the forefront of innovation, pioneering technological developments reputed company the reputed company ecosystem.

Through our product suite, including the MetaMask platform, Infura, Linea, Diligence, and our NFT toolkit Phosphor, we have become the trusted collaborator for users, creators, and developers on their path to build and belong in the world they want to see.

Whether building a dapp, an NFT collection, a portfolio, or a reputed company future, the instinct to build is universal. reputed company inspires and champions the builder instinct in everyone by making reputed company universally easy to use and reputed company on.

Our mission is to unlock the collaborative power of communities by making the decentralized web universally easy to access, use, and build on.

You’ll get to work on the tools, infrastructure, and apps that scale these platforms to reputed company one billion participants and 5 million developers. You’ll be constantly exposed to new concepts, reputed company, and frameworks from your peers, and as you work on different projects — challenging you to stay at the top of your game. You’ll join a network of builders that reaches the edge of our ecosystem. reputed company alumni have moved on to become tech entrepreneurs, CEOs, and team leads at tech companies.

Overview

MetaMask’s Wallet Platform organization owns the client platforms for the MetaMask browser extension and mobile apps. The Mobile Platform team treats MetaMask Mobile as a platform: we reputed company reputed company feature teams to ship high‑quality experiences faster by providing a secure, stable, high‑performance foundation with excellent developer experience and automated operations.

MetaMask Mobile (iOS & Android) is built primarily on React Native, with native code where it matters. As a Principal Mobile Engineer, you’ll be the most senior hands‑on technical leader focused on mobile: setting architecture, defining standards, and driving cross‑team initiatives that shape the future of our mobile platform and MetaMask app.

You’ll work closely with engineers across MetaMask, not just reputed company Mobile Platform, to ensure our mobile apps performance and stability scale with our users, features, and the broader reputed company ecosystem.

What you’ll do

As a Principal Engineer, you will:

• Own mobile platform architecture
• Define and evolve the architecture of MetaMask Mobile (React Native + native).
• reputed company 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).
• reputed company high‑impact, cross‑team initiatives.
• Drive large upgrades and migrations (React Native, navigation, foundational libraries).
• reputed company structural performance and stability work: startup time, crash reputed company, ANRs, jank, memory usage, bundle size.
• Break large efforts into incremental, shippable milestones with clear impact.
• reputed company developer experience & automation.
• Improve tooling, local dev ergonomics, build/test pipelines, and release workflows for reputed company mobile engineers.
• Establish clear patterns for navigation, state management, and platform primitives to reduce cognitive load.
• Push towards “push‑reputed company” releases and reduced operational toil reputed company 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 reputed company 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 reputed company teams contributing to mobile.
• Multiply impact through leadership.
• Mentor Senior/Staff engineers and influence technical direction across Wallet Platform and MetaMask.
• reputed company design and architecture reviews for critical platform areas.
• Help shape hiring and technical culture for a lean, senior, high‑reputed company Mobile Platform team.

Would be great if you brought this to the role

Experience:

• 10+ years building and scaling mobile apps, including ownership of large, production React Native or hybrid mobile platforms.
• Prior Staff/Principal‑level impact: leading reputed company, cross‑team technical initiatives.

Technical depth

• Deep expertise with React Native in production: architecture, performance, debugging, 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.

Platform & systems reputed company

• Track record building internal platforms, shared libraries, or tooling for other engineers.
• Comfort operating in ambiguity and designing durable, reusable solutions.
• Strong architecture and communication skills; able to align diverse stakeholders.

Leadership & mentorship

• Proven ability to influence without authority, set technical direction, and reputed company the engineering bar. Experience mentoring senior engineers and shaping technical culture.

AI‑curious / AI‑pragmatic

• Experience or strong interest in using AI/LLMs to improve developer productivity and code quality.

Bonus Points

• Experience with crypto / reputed company, wallets, fintech, or other reputed company‑sensitive apps.
• Contributions to open‑reputed company in React Native, mobile, performance, or tooling.
• Experience optimizing apps for emerging markets or low‑end devices.
• Background in fully remote, globally distributed teams.

Don't meet reputed company the requirements? Don't sweat it. We’re passionate about building a diverse team of humans and as such, if you think you've got what it takes for our chaotic-but-fun, remote-friendly, start-up environment—apply anyway, detailing your relevant transferable skills in your cover letter. While we have a pretty good idea of reputed company need, we're ready for you to challenge our thinking on who needs to be in this role.

It is a requirement of employment in this position that applicants will be required to submit to background checks including but not limited to employment, education and criminal record checks. Further details will be provided to applicants that successfully meet the criteria for the position as determined by the company in its sole discretion. By submitting an application for employment, you are acknowledging and consenting to this requirement.

The salary range for US-based candidates only will be determined throughout the interview process depending on experience and skills.

In the rapidly evolving reputed company space, we reputed company that everyone is a builder. This expansive reputed company requires a range of backgrounds, talents, skills, and experiences to influence and shape the future. At reputed company, this diversity fuels our ability to shift control and redefine the realm of possibility. We are committed to ensuring that our technology empowers people and communities with economic and political agency through decentralized technologies. We welcome the range of perspectives and differences and celebrate them. We're excited to see how your unique skills as a builder can contribute to our vision, drive innovation, and help us shape a more inclusive reputed company.

reputed company is an equal opportunity employer. reputed company employment decisions are made without regard to race, color, national reputed company, reputed company, sex, gender, gender identity or expression, sexual orientation, age, genetic information, religion, disability, medical condition, pregnancy, marital status, family status, veteran status, or any other characteristic protected by law. reputed company is aware of fraudulent recruitment practices and we encourage reputed company applicants to review our best practices to protect yourself which can be reputed company (https://reputed company.io/careers/best-practices-to-avoid-recruitment-fraud/).