Senior Mobile Engineer (React Native)

Arcus; Northern, New York (KY, NY); Hybrid; USD 210,000 - 270,000; Full time

Job summary

Arcus is building the future of global markets with a mobile-first platform. We’re seeking a seasoned React Native engineer to own mobile features from architecture to release, collaborating with product, design, and backend teams to deliver fast, reliable trading experiences.

You will work on crypto wallets, DeFi interfaces, and real-time updates, ensuring high performance and excellent user experience across iOS and Android.

Qualifications

• 5+ years of software engineering experience focusing on mobile apps.
• Proven record ships React Native apps at scale.
• Strong JS/TS proficiency and mobile architecture knowledge.
• Experience publishing on iOS and Android.
• Excellent collaboration with design and product teams.

Responsibilities

• Build and enhance Arcus mobile app using React Native.
• Own end-to-end features from architecture to release.
• Collaborate with product, design, and backend teams.
• Define technical direction and app architecture.
• Improve performance, reliability, observability, and DX.
• Work with blockchain-related interfaces and crypto wallets.
• Partner with cross-functional teams to deliver trading experiences on mobile.

Skills

React Native

JavaScript

TypeScript

Mobile architecture

Performance optimization

Testing

Cross-functional collaboration

Fast learner

Education

CS degree or equivalent

Tools

Redux

React Query

Zustand

iOS (Swift)

Android (Kotlin)

Job description

Build the Future of Global Markets

At Arcus, our mission is to empower anyone to build wealth by making investing accessible, affordable, and simple. The team behind Arcus previously built dYdX, helping power over $1.5 trillion in trading volume. Now we're bringing the world's financial markets onchain.

Built in partnership with Robinhood Chain and backed by a direct investment from Robinhood Crypto, Arcus brings crypto, stock tokens, commodities, and perpetual futures into one self-custodied account. Our vision is to build the world's best spot and perpetuals exchange - trusted, accessible, and reliable, with deep liquidity and accurate prices. Every asset, 24/7.

• Experienced team: Google, Meta, Citadel, DRW, IMC Trading, Stripe, Coinbase, and more.
• Leading backers and advisors: Andreessen Horowitz, Polychain Capital, Brian Armstrong, Fred Ehrsam, Naval Ravikant, Elad Gil, and more.

Join us in shaping the next generation of global financial markets.

Learn more about working at Arcus

RESPONSIBILITIES:

• Build and enhance the Arcus mobile application using React Native
• Own end-to-end mobile features from architecture and implementation through testing, release, and ongoing maintenance
• Collaborate closely with product managers, designers, and backend engineers to deliver intuitive and performant mobile experiences
• Help define the technical direction and architecture of our mobile platform
• Improve application performance, reliability, observability, and developer experience
• Work with technologies that directly interface with blockchain networks, wallets, and decentralized protocols
• Partner with cross-functional teams to deliver best-in-class trading experiences on mobile

REQUIREMENTS:

• You have demonstrated technical excellence through previous work and shipped high-quality mobile applications at scale
• Strong experience building and maintaining production React Native applications
• Proficiency in JavaScript and TypeScript
• Deep understanding of mobile application architecture, state management, networking, performance optimization, and testing
• Experience publishing and supporting applications on both iOS and Android platforms
• Strong product sense and attention to user experience details
• You are a fast learner who can quickly master new technologies and complex systems
• 5+ years of software engineering experience, including significant experience building mobile applications
• Experience collaborating with designers, product managers, and backend engineers in fast-paced environments

NICE TO HAVES:

• Experience building financial, trading, fintech, or security-sensitive applications
• Experience with native iOS (Swift) and/or Android (Kotlin) development
• Experience with React Query, Redux, Zustand, or similar state management solutions
• Experience building highly performant real-time applications
• Experience working with crypto wallets, blockchain technologies, or DeFi products
• Familiarity with CI/CD pipelines, automated testing, and mobile release processes
• Experience mentoring engineers and influencing technical direction
• CS degree or equivalent practical experience

Salary range for this role is $210K to $270K (NY). Compensation subject to experience and location. Published salary bands pursuant to transparency laws, and do not include possible variable compensation such as annual merit increases, bonus eligibility, commission, or equity incentive.