Senior Mobile Engineer

October 31

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0x Labs

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API • Web 3 • Fintech

0x Labs is a company specializing in providing a suite of APIs that simplify DeFi (Decentralized Finance) trading and token swaps for developers and businesses in the Web3 ecosystem. Their products include Swap API, Gasless API, and Trade Analytics API, allowing users to embed swaps, conduct gasless swaps, and unlock trade insights. 0x Labs supports integrations across multiple blockchain networks, offering aggregated liquidity from over 130 exchanges. Their solutions enable seamless integration of crypto trading functions into applications with only a few lines of code, supporting millions of tokens, and providing powerful analytics and management tools.

51 - 200 employees

Founded 2016

🔌 API

🌐 Web 3

💳 Fintech

📋 Description

• 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.

🏖️ 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!)