Backed by First Round Capital.
About the role
A collector borrows against a card they own. We size the advance, disburse it, hold the collateral, and manage the loan for however long it runs. Meanwhile an auction closes and hundreds of payouts go out at once, each against a different fee schedule — some by ACH, some by wire, some instant. Every one of those movements has to land in a double-entry ledger that still balances at the end of the day.
What they're looking for
- 5+ years of experience with a heavy focus on backend systems — Python, Postgres, AWS
- You've worked on real money movement. ACH origination and returns, RTP or FedNow, wires, or equivalent. You know what an R01 is, why NACHA return windows matter, and why a credit-push rail changes the product flow and not just the API call
- You've worked with a double-entry ledger. Built one, migrated one, or owned one in production — and you can explain a modeling decision you'd make differently now
- You've handled large transactions , where the failure mode is a five- or six-figure problem and someone notices immediately
- Database mastery. Expert SQL and relational design. You know how to write a transaction that won't fail under load — including at auction close and during scheduled auto-pay batches
- You're API-native. Webhooks, idempotency, eventual consistency, and reconciliation are your default vocabulary
More about this role
Alt is unlocking the value of alternative assets, starting with the $5 B trading-card market. We let collectors buy, sell, vault, and finance their cards in one place and we are backed by leaders at Stripe, Coinbase, Seven Seven Six, and pro athletes like Tom Brady and Giannis Antetokounmpo. Our next frontier is real-time pricing at scale—the Alt Value that powers every trade, loan, and product on the platform.
A collector borrows against a card they own. We size the advance, disburse it, hold the collateral, and manage the loan for however long it runs. Meanwhile an auction closes and hundreds of payouts go out at once, each against a different fee schedule — some by ACH, some by wire, some instant. Every one of those movements has to land in a double-entry ledger that still balances at the end of the day.
That is the whole job. You own the ledger that is Alt's system of record, the money movement that feeds it, and the reconciliation that proves the two agree. You are not building a checkout flow. You are building the liquidity that makes this marketplace work.
The KPI: 99.99% reliability on gateway and banking integrations, and a ledger where every cent is accounted for and...
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