Senior Fullstack Engineer, Payments at Alt

About the role

What will you do at Alt?

We are looking for a Senior Fullstack Engineer with 3-5+ years of experience to build the financial engine powering Alt's double-sided marketplace for trading cards. You'll own real-time payments infrastructure processing large ACH transactions across a platform that grew 505% last year — this is not credit card processing, this is moving serious money. What will you be doing?

Processing thousands of large-value transactions ($100K+) through Stripe and banking partner integrations Building and maintaining a custom double-entry ledger system for the marketplace Developing new ledgers for future lending and financial products Working 70% backend (Python) with React/React Native on the frontend Collaborating on a small payments pod (3 engineers total) operating on a ticketing basis

Which skills does this role require?

PythonPostgresAWSReactTypeScriptReact NativeStripe

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