Senior Mobile Engineer (React Native)

TL;DR

Senior Mobile Engineer (React Native): Building Matcha Mobile, a greenfield app for decentralized trading across multiple blockchains with an accent on high-performance UX, robust architecture, and secure crypto wallet integration. Focus on designing state management, smooth gestures and animations, fast load times, transaction signing flows, and optimizing performance for iOS and Android.

Location: Supportive remote environment worldwide; SF office available for those in the region; willingness to travel globally for two annual team meetups (expenses covered).

Salary: USD $120,000 - $230,000 + equity + ZRX tokens + benefits.

Company

hirify.global builds developer APIs for web3 trading, powering DEX aggregator Matcha and wallets like MetaMask; processed over $180B in volume since 2017.

What you will do

• Build and ship React Native app for iOS/Android from the ground up.
• Design architecture, state management, CI/CD, telemetry, and feature flags.
• Implement high-performance UX: snappy lists, smooth gestures, fast loads, secure wallet flows.
• Collaborate with design, backend, and product to prototype and iterate features.
• Write clean TypeScript code with typing, linting, testing (Jest, Detox/Maestro).
• Define mobile engineering practices: code reviews, pairing, performance tuning.

Requirements

• 5+ years mobile engineering with deep React Native and TypeScript fluency.
• Shipped complex mobile apps from blank repo to app stores.
• Modern RN: custom hooks, Zustand/Recoil, Reanimated, FlatList, memoization, profiling.
• Experience with crypto wallets/DeFi apps (key management, signing, tx UX, WalletConnect, EIP-155).
• Native modules knowledge (Objective-C/Swift/Java/Kotlin plus).
• Debugging on real devices, CI/CD, feature flagging.

Nice to have

• Mobile security and key management best practices.
• Prior native iOS/Android development.
• Analytics pipelines and A/B testing on mobile.
• Open source contributions to RN or Web3 libraries.

Culture & Benefits

• Comprehensive US insurance (medical/dental/vision/life/disability) for US-based; mental health therapy covered.
• 401k/FSA for US-based; monthly phone/wellness/transport stipends.
• Remote/WFH setup stipend (headphones/gear); lunch reimbursement globally.
• 12-week paid parental leave; flexible vacation.
• Low-ego, ownership-driven culture focused on code quality, learning, user-first mindset, and core values.