Senior Mobile Engineer | Matcha

COMPANY

At 0x, our mission is to "Create a Tokenized World Where All Forms of Value Can Flow Freely". We deliver this to web3 builders with a delightfully simple suite of developer APIs that provide faster trading, better prices, and superior user experience.

Founded in 2017, we’ve processed over 78M+ transactions and $140B+ in trading volume from users trading on Matcha, Coinbase Wallet, Robinhood Wallet, Phantom, Rainbow, DefiLlama, MetaMask, Zerion, Zapper, and many more. Our investors include Greylock Partners, Pantera Capital, and Jump Crypto.

When you join 0x, you’ll become part of a veteran team of crypto builders who know the importance of code quality, team cohesion, and a culture of learning.

Matcha is 0x’s DEX aggregator - helping users trade across multiple blockchains at the best prices with one simple interface.
We’re now building Matcha Mobile, a greenfield React Native app that will make decentralized trading as effortless on mobile as it is on web.

This is a foundational engineering role: you’ll own architecture, performance, and product experience end-to-end.
You’ll collaborate directly with design, backend, and product to shape how crypto trading feels in your hand.

If you love React Native, smooth UI, strong system design, and crypto, this is your chance to build something millions will use.

• 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.

• 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.

• Ability and willingness to attend two in-person team meet-ups per year anywhere in the world.

• 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.

• Think from the user’s perspective and enjoy building intuitive mobile flows.

• Care about performance, quality, and testing as much as features.

• Value collaboration over ego and own your work end-to-end.

• Stay curious - you experiment, learn new tools, and keep up with React Native evolution.

• Believe in crypto’s potential to make finance more open and fair.

• The base salary range for this position is USD $120,000 - $230,000 + equity + ZRX tokens + benefits. Within the range, individual pay is determined by job-related skills, experience, location, business needs, and candidate preferences between the different compensation elements.

• 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!)

0x and its associated entities are dedicated to fostering diversity, inclusion, and belonging in its teams and workforce, and are proud to be equal opportunity employers. 0x does not make employment or hiring decisions on the basis of race, color, creed, religion, sex (including those who are pregnant or have given birth), sexual orientation, gender, gender expression or identity, age, disability, medical condition, genetic information, military or veteran status, marital status, pregnancy, citizenship, national origin, immigration or citizenship status, political affiliation, or any other basis that is protected by applicable local, state, or federal laws. This includes not making such decisions based on the status itself, as well as any associations, perceptions, and assumptions made regarding these statuses. 0x will also consider qualified applicants with arrest and conviction records in a way that is consistent with San Francisco’s Fair Chance Ordinance and similar local laws. Our commitment to equal employment opportunity extends to ensuring that all applicants and employees can perform to their fullest potential, including through obtaining reasonable accommodations when necessary.