Principal Mobile Engineer, Platform

Consensys is the leading blockchain and web3 software company founded by Joe Lubin, CEO of Consensys and Co-Founder of Ethereum. Since 2014, Consensys has been at the forefront of innovation, pioneering technological developments within the web3 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 better future, the instinct to build is universal. Consensys inspires and champions the builder instinct in everyone by making web3 universally easy to use and develop 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 onboard one billion participants and 5 million developers. You’ll be constantly exposed to new concepts, ideas, 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. Consensys alumni have moved on to become tech entrepreneurs, CEOs, and team leads at tech companies.

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.

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 complex, 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 mindset** - 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 raise 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.

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. - The salary range for US-based candidates only will be determined throughout the interview process depending on experience and skills. - US pay range (not including bonus, equity or other benefits) $227,000—$272,000 USD.

Consensys is a leading blockchain and web3 software company founded by Ethereum co-founder Joseph Lubin in 2014. The company builds tools, infrastructure, and enterprise software products powered by Ethereum, including MetaMask (a self-custodial finance platform), Infura (developer infrastructure), and other web3 applications.