Fin

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. If banks and payment products were reinvented today, they would look like Fin.

Listed Jobs

Company Name

Fin

Job Title

Senior Full-Stack Software Engineer

Job Description

Job title: Senior Full‑Stack Software Engineer Role Summary: Lead the design, development, and delivery of end‑to‑end product features across web and mobile platforms, owning the entire lifecycle from specification through production. Expactations: Own complex product initiatives, collaborate closely with leadership and cross‑functional teams, maintain high code quality, and scale services to handle large‑volume, real‑money transactions with robustness and observability. Key Responsibilities: - Design, build, and ship full‑stack features for web and mobile (React Native). - Own projects end‑to‑end: scope, architect, implement, test, and release. - Integrate third‑party payment, financial, compliance, and identity APIs (e.g., Stripe, PayPal, crypto rails). - Develop scalable, high‑performance services for high‑value transaction processing. - Ensure security best practices for authentication, authorization, and sensitive data handling. - Maintain code quality through rigorous testing, clean abstractions, and code review. - Collaborate with product, design, and operations to deliver simple, user‑friendly experiences. Required Skills: - Deep expertise in TypeScript and Node.js. - Production experience with React Native (Expo ecosystem preferred). - End‑to‑end product ownership experience in a fast‑moving environment. - Strong debugging skills across database, infrastructure, and front‑end performance. - Solid understanding of security best practices (auth, authoriz, data protection). - Excellent written and verbal communication; ability to interface with non‑engineering stakeholders. - Ability to thrive in ambiguity and shifting priorities typical of early‑stage startups. - Bonus: experience with traditional fintech integrations (Stripe, Plaid, ACH) or blockchain infrastructure (Solana). Required Education & Certifications: - Bachelor’s degree in Computer Science, Software Engineering, or related field (or equivalent professional experience). ---

New york, United states

On site

Senior

03-12-2025