Senior Mobile Software Engineer (NYC)

Común Mobile Developer Position

Own the mobile experience that powers our unique banking platform. You'll help shape the product roadmap, turn design files into reality, and keep our component library sharp so we can ship fast without sacrificing quality. Our stack includes React Native, Expo, TypeScript, and GraphQL.

What You'll Do

• Build and ship new features with product, design, and backend teams.
• Define frontend patterns, tools, and processes that speed development.
• Maintain testing and observability to ensure a stable, high-quality app.
• Evolve our design system and component library for consistency and scale.
• Partner with leadership on technical planning and architecture.

You Are

• Comfortable leading technical decisions and working independently in a fast-moving startup.
• Skilled at breaking down ambiguous problems and explaining trade-offs.
• Experienced debugging complex issues across frontend, API, and mobile layers.

Requirements

• Strong React and TypeScript production experience.
• React Native and Expo experience.
• Deep understanding of frontend architecture, state management, testing, and accessibility.
• Proven ability to ship secure, high-uptime apps (fintech, e-commerce, or similar).

Nice to Have

• Expo experience.
• Experience publishing and maintaining iOS/Android apps.
• Familiarity with mobile performance optimization, payments, authentication, or KYC flows.

We love domain experts who push the quality bar—and versatile builders who think like founders.

Team

We are a team of 40 based out of New York, coming from industry-leading companies like Brex, Nubank, Cruise, and Verkada. Over half of us are immigrants, and have experienced the problems we're solving first hand. We value customer focus, high ambition, principled decision-making, and deep trust. Full Time Employee Benefits

• Competitive salary and generous equity
• Medical, dental, and vision insurance
• Gym Pass subscription
• Daily office lunch in NYC Office
• Paid parental leave
• Flexible PTO
• Remote-friendly when traveling
• Company-wide offsites
• 401(k) for US employees
• Visit to our NYC Office for remote team members
• Visa sponsorship if applicable

Común is proud to be an equal opportunity employer. We are committed to building a diverse and inclusive culture that celebrates authenticity. We do not discriminate on the basis of race, religion, color, national origin, gender, gender identity, sexual orientation, age, marital status, disability, protected veteran status, or any other legally protected characteristics.