About the Position

We are looking for a Mobile Engineer to join our team at Fin, a next-generation payments platform built for high-value, global, and instant transactions. As a Mobile Engineer, you will own our mobile experience across iOS and Android using React Native. This role is pivotal in shaping how our product feels in the real world, turning complex payment flows into simple, intuitive interfaces.

About Fin

Fin is a Series A-stage company backed by notable investors like Sequoia and Circle. We are powered by stablecoins and enable users and businesses to move millions of dollars in seconds. By combining the speed of crypto with the reliability of traditional finance, Fin is reinventing how money moves worldwide.

Responsibilities

Own the Fin mobile app across iOS and Android using React Native, from architecture to implementation and polish.
Design and implement flows that make sending, receiving, and managing money feel simple and trustworthy for everyday users.
Help design secure account and custody patterns that can scale to handle meaningful balances and real-world usage.
Collaborate with design and product to prototype, refine, and ship new features quickly.
Maintain a high bar for code quality through thoughtful architecture, code review, and testing.
Work with backend and infra engineers to integrate APIs, payments, and identity or security features into the mobile app.

Requirements

3+ years of experience building and shipping mobile apps in React Native. Deep familiarity with the Expo ecosystem and modern mobile build pipelines (EAS) is required.
Strong product sense and attention to detail in UI and UX, especially for consumer-facing apps.
Solid understanding of mobile app architecture, performance, and offline or edge cases.
Ability to work independently, set priorities, and drive projects from idea to shipped.
Strong communication skills and comfort collaborating with design, product, and backend teams.
Interest in payments, fintech, or crypto. Curiosity about the space helps.

Bonus Points

Experience in traditional consumer fintech apps (neobanks, peer-to-peer payments) OR mobile crypto wallets (Solana, non-custodial, etc).
Experience with cloud platforms such as GCP or AWS.
Experience deploying smart contracts on Solana or integrating with blockchain-based systems.
Background in security, threat modeling, or penetration testing, especially for consumer finance products.

We Offer

Competitive salary ranging from $125K to $250K.
Equity as part of the compensation package.
Work from anywhere policy, with options to work in New York, NY, or remotely.

About the Company

Fin is a next-generation payments platform built for high-value, global, and instant transactions. We are a Series A-stage company backed by Sequoia, Circle, and other notable investors. Powered by stablecoins, Fin enables users and businesses to move millions of dollars in seconds - whether to other Fin users, directly into bank accounts, or across crypto rails. By combining the speed of crypto with the reliability and trust of traditional finance, Fin reimagines how money moves worldwide.

Mobile Engineer

Job description