[Hiring] Staff Software Engineer @Alt Platform Inc

Role Description

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.

THE NORTH STAR: 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
• Time to bring a new PSP or rail to production

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.

The people who are great at this have owned a ledger somewhere it mattered, and they think in idempotency, race conditions, and reconciliation.

WHAT YOU'LL OWN:

• The ledger as system of record: entries, lines, balances, holds, reversals, and the states between: pending, posted, available, canceled, declined, reversed.
• Immutability and audit trail as design constraints, not features.
• Point-in-time balances that show a customer where they stood on any past date.
• Rails and money movement: ACH origination and returns, RTP and other instant rails, wires, cards, and stablecoin settlement.
• Reconciliation: when the ledger and the processor disagree, you own the answer.
• Payouts and lending infrastructure: getting sellers and borrowers their money faster than anyone else in this market.
• Risk posture on high-value flows: holds, limits, and settlement windows set with data.
• The trade-off calls: shipping speed against uncompromising correctness, build against buy.

WHAT GREAT LOOKS LIKE IN 6 MONTHS:

• The reconciliation automation rate is materially higher than the day you started.
• The exception queue at daily close is worked to zero by a human in under an hour.
• A new rail or PSP has gone to production on the provider architecture you designed.
• Pending, posted, and available are modeled cleanly enough that Support answers "where is my money" off the customer-facing surface.
• Corrections post as reversing entries; nobody has edited history.
• At least one thing you shipped is running with AI in the loop.
• Finance trusts the close.

HOW YOU'LL USE AI HERE:

• Turn a payment provider or bank partner integration spec into a typed client and a test suite in an afternoon.
• Stand up a rail simulator that produces the failures a sandbox won't.
• Build an agent that triages the reconciliation exception queue overnight.
• Put an MCP server over the ledger for discrepancy questions.
• Generate adversarial test cases for the lending and settlement state machines.
• Have a view on what should not be handed to a model in financial code.

Qualifications

• You have owned a double-entry ledger in production.
• You have moved real money on real rails.
• You have handled large transactions.
• Database mastery: expert SQL and relational design.
• You're API-native.
• You've built real things with AI.
• Product-owner thinking.
• Restraint: knowing when to avoid overengineering.
• Strong plus: enough React and TypeScript to ship the customer-facing surface.
• Backgrounds that fit: payments or ledger infrastructure at a pre-IPO fintech.
• Bonus: distributed systems, credit or risk modeling, direct experience with payment services.

Requirements

• US-based, remote.

Benefits

• We cover 85% of your medical, dental, and vision, and up to 50% for dependents.
• Generous PTO that people actually take.
• Parental leave at full salary.
• $200/month wellness + $100/month home office stipend.
• Free DoorDash Pass membership.
• Remote-first (for most positions), with WeWork access.
• 401(k).
• Alt Equity to all full-time employees.

How We'll Interview You

• Recruiter screen, 25 minutes, Google Meet.
• Hiring manager, Robbe Simon, 45 minutes, Google Meet.
• Technical screen, 60 minutes.
• Architecture and system design, 60 minutes.
• Culture interview, 30 minutes.
• Leore, our founder and CEO, 30 minutes.
• Reference check(s), 15 minutes, with a former manager.

Compensation

$200,000 - $500,000 per year, plus equity for all full-time employees.