Senior Mobile Engineer Jobs

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Category:
IT - Software Development

Contract Type:
Not provided

Salary:

120000.00 - 230000.00 USD / Year

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Job Description:

Senior Mobile Engineer position focused on building Matcha's new React Native app for iOS and Android, shaping mobile crypto trading experience, and contributing to decentralized finance.

Job Responsibility:

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

Requirements:

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

Nice to have:

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

What we offer:

equity
ZRX tokens
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)

Additional Information:

Job Posted:
December 01, 2025

Employment Type:

Fulltime

Work Type:

Remote work

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