0x · 1 week ago
Senior Mobile Engineer (React Native)
United States
Full-time
Remote
Mid, Senior Level
$120K/yr - $230K/yr
5+ years exp0x is a company focused on creating a tokenized world through developer APIs for web3 builders. They are seeking a Senior Mobile Engineer to build Matcha's new React Native app, collaborating with design and product teams to enhance the mobile trading experience.
BlockchainCryptocurrencyDecentralized Finance (DeFi)Ethereum
Hiring Manager
Alex K.
Responsibilities
Build and ship Matcha’s new React Native app for iOS and Android from the ground up
Design robust architecture, state management, and in-app infrastructure (CI/CD, telemetry, feature flags)
Implement high-performance mobile UX - snappy lists, smooth gestures, fast load times, and secure wallet flows
Collaborate closely with design and product to prototype, iterate, and ship features quickly and safely
Write clean, modern TypeScript and React Native code with proper typing, linting, and testing coverage (Jest, Detox/Maestro)
Help define the mobile engineering culture - code reviews, pairing, testing discipline, and continuous performance tuning
Contribute to open discussions on design trade-offs and product priorities with a user-first mindset
Qualification
Required
5+ years of mobile engineering experience with deep fluency in React Native and TypeScript
Proven track record of shipping complex mobile apps - ideally from blank repo to App Store/Play Store
Hands-on experience with modern RN patterns: custom hooks, Zustand/Recoil, Reanimated, FlatList, memoization, and performance profiling
Experience working on crypto wallets or DeFi mobile products (e.g. Matcha, MetaMask, Safe, Uniswap, Phantom, Rainbow, Rabby, Backpack, etc.)
You understand key management, signing flows, transaction UX, and Web3 connectivity (WalletConnect, EIP-155)
Understanding of native modules and when to use them for crypto or performance-critical tasks (Objective-C, Swift, Java, Kotlin a plus)
Strong debugging habits and comfort profiling on real devices across Android and iOS
Familiarity with mobile CI/CD pipelines, incremental rollouts, and feature flagging
Excellent collaboration and communication skills - you think out loud, stay calm under pressure, and embrace feedback
A low-ego, ownership-driven approach to building great products with others
Knowledge and passion for decentralized finance and the 0x mission
Exhibit our core values: do the right thing, consistently ship, and focus on long-term impact
Willingness to travel globally for two annual in-person team meetups - all travel expenses covered
Preferred
Knowledge of mobile security and key management best practices
Prior native app development (iOS/Android)
Familiarity with analytics pipelines and A/B testing on mobile
Contributions to open source React Native or Web3 libraries
Benefits
Comprehensive insurance (medical/dental/vision/life/disability) for U.S.-based employees - 100% of base plan covered for you and dependents
401k and FSA for U.S.-based employees
Monthly mobile phone bill, wellness, and pre-tax transportation expense
Covered mental health benefits (included professional therapy sessions)
A supportive remote environment
Lunch reimbursement for all employees across the globe!
Stipend for your ideal remote / WFH set-up: headphones, and any other work gear you may need
12-week paid parental leave
Great office conveniently located in the SF Financial District for those in the region!
Flexible vacation: Take time when you need it (and we really mean it!)
Company
0x
0x is an open protocol that enables peer-to-peer trading of assets.
51-200 employees
Funding
Current Stage
Growth StageTotal Funding
$109MKey Investors
GreylockPantera Capital
2022-04-26Series B· $70M
2021-02-05Series A· $15M
2020-10-19Secondary Market
Leadership Team
Amir Bandeali
Co-CEO
Will Warren
Co-founder & CEO
Recent News
sarahguo.com
2025-12-01
Crowdfund Insider
2025-10-28
Company data provided by crunchbase