Senior Mobile Software Engineer

Común Mobile Developer

Comun's mission is to help Hispanic immigrants turn their hard work into upward mobility — starting with financial services that support their transition from a cash-based system to the digital economy.

Own the mobile experience for a fintech app serving an underserved community. You'll shape the product roadmap, translate design into production code, and keep our component library sharp so we can ship fast without breaking things. Our stack is React Native, Expo, TypeScript, and GraphQL — built on trunk-based development with fast iteration cycles.

What You'll Do

• Build and ship features across payments, banking, KYC, and authentication flows, working directly with product, design, and backend teams.
• Define and enforce frontend patterns, tooling, and processes that raise the quality bar and speed delivery.
• Own observability and testing for core mobile flows — you'll be the person who catches regressions before users do.
• Evolve our design system and component library for consistency at scale.
• Partner with leadership on architecture decisions and technical roadmap.

You Are

• Comfortable owning technical decisions end-to-end in a fast-moving startup where the right answer isn't always obvious.
• Experienced debugging hard problems across mobile, API, and native layers.
• Fluent in trade-offs — you can explain why something is the right call, not just that it works.

Requirements

• Strong React Native and TypeScript production experience — you've written components other people depend on.
• Experience shipping and maintaining iOS and Android apps through the App Store and Google Play.
• Deep understanding of frontend architecture, state management, testing, and mobile performance.
• Experience with GraphQL in a production codebase.
• Proven track record in fintech, financial services, or a similarly regulated, high-uptime environment.
• Comfortable with secrets management, CI/CD pipelines, and working in a codebase with pre-commit hooks and automated code review.

Nice to Have

• Experience with KYC, remittances, or payment flows.
• Familiarity with Expo's managed vs. bare workflow trade-offs.
• Prior work on observability tooling (Datadog or similar) for mobile.

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.