Backed by First Round Capital.
About the role
This is a builder's seat, not a manager's seat. You will write the ledger, the rails, and the reconciliation yourself. You will make the build-versus-buy call and defend it. You will tell the business no when correctness demands it, and you will be right often enough that they keep asking.
What they're looking for
- You have owned a double-entry ledger in production. Built one, migrated one, or been the person accountable for one. You can explain a modeling decision you would make differently now, and why
- You have moved real money on real rails. 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 have handled large transactions, where the failure mode is a five- or six-figure problem and somebody notices immediately
- Database mastery. Expert SQL and relational design, and a transaction that holds under load at auction close and during scheduled auto-pay batches. Python, Postgres, and AWS are our stack
- You're API-native. Webhooks, idempotency, eventual consistency, and reconciliation are your default vocabulary, not terms you looked up
- You've built real things with AI, not just used it. Agents, skills, MCP servers, connectors, internal tooling people depend on
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.
99.99% reliability on gateway and banking integrations, and a ledger where every cent is accounted for and every entry says who created it and when.
Supporting KPIs: reconciliation exception queue depth at daily close, gateway and banking integration uptime at 99.99%, P90 time from auction close to seller funds available, share of ACH returns and reversals handled with no manual correcting entry, and time to bring a new PSP or rail to production.
This is a builder's seat, not a manager's seat. You will write the ledger, the rails, and the reconciliation yourself. You will make the build-versus-buy call and defend it. You will tell the business no when correctness demands it, and you will be right often enough that they keep asking.
The people who are great at this have...
Browse similar: Startup jobs · Remote jobs