Senior Mobile Software Engineer

Común; New York (NY); On-site; USD 100,000 - 140,000; Full time

Benefits offered by this job

Competitive salary and generous equity

Medical, dental, and vision insurance

Gym Pass subscription

Daily office lunch in NYC Office

Paid parental leave

Flexible PTO

Company-wide offsites

401(k) for US employees

Visa sponsorship if applicable

Job summary

A fintech company in New York seeks a Senior Mobile Software Engineer to lead mobile experience enhancements. You will collaborate across teams to define frontend patterns and maintain high-quality applications with React and TypeScript. The ideal candidate has strong production experience in React and a deep understanding of frontend architecture. This role offers a competitive salary and benefits including flexible PTO and gym subscriptions.

Qualifications

• Strong React and TypeScript production experience.
• Deep understanding of frontend architecture, state management, testing, and accessibility.
• Proven ability to ship secure, high-uptime apps.

Responsibilities

• Build and ship new features with product, design, and backend teams.
• Define frontend patterns, tools, and processes.
• Maintain testing and observability for app stability.
• Evolve design system and component library.
• Partner with leadership on technical planning.

Skills

React

TypeScript

Debugging complex issues

Frontend architecture

Tools

Expo

GraphQL

Job description

Join to apply for the Senior Mobile Software Engineer (NYC) role at Común

About Comun Comun’s mission is to help Hispanic immigrants turn their hard work into upwards mobility — starting with financial services that enable the transition from cash to the digital economy.

We offer checking accounts that immigrants can open using more than 100+ IDs from Latin America; more than 90K locations across the country to deposit cash; international transfers at market leading rates to 17 countries in Latin America; and 24/7 bilingual customer support with <5 min SLA across email, chat and phone.

A year ago we launched our own banking infrastructure, resulting in 100x revenue growth and 4x growth of ARPU. We currently process over $1.5B in transaction volume on a yearly basis, and crossed $100M in annualized international transfers just six months after launching them.

We’ve raised $30M from Redpoint, Costanoa Ventures, and South Park Commons, among others. Most of our team comes from leading fintech companies like Brex and Nubank.

We believe immigrants are the ultimate entrepreneurs, carrying a relentless work ethic in search of a better future for their families. Comun exists to serve them throughout their journey.

Learn more at comun.app/nosotros

About The Role

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.
• 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

• React Native and 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 38 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

Seniority level

Mid‑Senior level

Employment type

Full‑time

Job function

Engineering and Information Technology

Comun 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.