Senior Software Engineer - Mobile, 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+ million 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.

About the Role

Matcha is a decentralized exchange (DEX) aggregator built by 0x, designed to help users get the best price across numerous major blockchains. Trusted by hundreds of thousands of traders and facilitating billions in trading volume, Matcha makes crypto trading simple, seamless, and user-focused.

We’re building a greenfield mobile app from scratch — and we’re looking for a Mobile React Native Engineering Lead to own it.

As our first mobile engineer, you’ll play a foundational role in defining and building the future of Matcha on mobile. This is a hands-on role where you’ll work closely with product, design, and engineering leadership to shape the app’s architecture, own key technical decisions, and eventually build and lead a mobile engineering team.

If you’re passionate about crypto, love crafting beautiful user experiences, and want to own a product end-to-end, we’d love to hear from you.

Key Responsibilities

• Lead the end-to-end development of our new React Native mobile app for iOS and Android.

• Design and implement app architecture, state management, and mobile-specific infrastructure (e.g., release pipelines, telemetry, CI/CD).

• Collaborate closely with product, design, and backend teams to build seamless, intuitive, and performant DeFi experiences.

• Own the mobile user experience and bring complex features (e.g., trading, signing, wallet connectivity) to life.

• Maintain a high bar for code quality, testing, and performance through code reviews and technical mentorship.

• Stay current with React Native and web3 best practices, tools, and community trends to continuously improve the app.

• Define long-term technical direction for mobile and contribute to hiring and onboarding future mobile engineers.

Required Qualifications

• 7+ years of experience in mobile development, with deep expertise in React Native and mobile application architecture.

• Proven track record of owning and delivering complex mobile projects — ideally products launched from scratch.

• Strong proficiency in TypeScript, React Native CLI & Expo, and native modules (Objective-C, Swift, Java, Kotlin).

• Experience integrating mobile apps with REST and GraphQL APIs.

• Familiarity with state management libraries like Zustand, MobX, Redux, or Recoil.

• Deep understanding of mobile performance optimization, profiling, and debugging tools.

• Experience with mobile CI/CD pipelines and app distribution through the App Store and Google Play.

• Excellent communication and collaboration skills in a remote, async-friendly environment.

• Comfortable operating autonomously in a fast-paced, product-led environment.

• Passion for DeFi, open finance, and building tools that empower users.

Preferred Qualifications

• Prior experience developing fully native iOS or Android apps (Objective-C, Swift, Kotlin, or Java).

• Experience working with crypto wallets (e.g., MetaMask, WalletConnect, Rabby) and web3 connectivity on mobile.

• Strong understanding of mobile security best practices, especially in a crypto context.

• Experience with product analytics, user telemetry, and experimentation on mobile (e.g., A/B testing, feature flags).

• Familiarity with modern product development tools like GitHub, Slack, Notion, and Linear.

Benefits

• The base salary range for this position is $95,000 - $230,000 + equity + ZRX tokens + benefits. Within the range, individual pay is determined by job-relate