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About the Role
As a Software Engineer on Ledger at Cardless, you'll own the system that tracks what every cardholder owes us and what we owe them. The ledger is the system of record for balances across every card program we run. Statements, interest, how payments get applied, what a customer sees in the app, what we report to our partners: all of it depends on the ledger being right. You'll own its architecture. This is a senior-to-staff role with real architectural ownership, and it's a founding engineering role on our ledger and credit systems.
Responsibilities
- Own the double-entry ledger that is the system of record for balances across every card program we run, and the invariants it has to hold
- Build the credit mechanics on top of it: billing cycle close, statement generation, interest accrual, payment allocation, fees, delinquency, and charge-off
- Own reconciliation from sub-ledger to GL, and build the break detection that catches silent failures before close
- Set the architecture and decide what gets built in what order
- Work directly with Finance, Compliance, and our partners on the requirements a ledger has to satisfy to survive an audit
Requirements
- 6+ years building production backend systems, with meaningful time on ledger, core banking, money movement, or payments platform work
- You've built one, not integrated with one. At least one of: a double-entry ledger that became the system of record for balances; in-house card processing or authorization and settlement infrastructure; or a migration of a card or money-movement program off a third-party processor onto in-house rails
- You think in invariants: idempotency, immutability, event sourcing, what has to hold at all times and how you'd prove it holds
- Strong distributed systems and API fundamentals in a modern backend language
- You're comfortable with ambiguity. You'll be scoping your own work, and you'll have to explain your tradeoffs to colleagues across functions
Skills
- Credit card ledgers specifically: revolving credit, billing cycles, interest accrual, APR, minimum payments, payment waterfalls, installment plans, Reg Z / TILA
- Auth-to-settlement lifecycle: pending versus posted, capture, clearing, network files, ISO 8583, refunds and reversals, dispute and chargeback accounting
- You built or rewrote the ledger at a Chime, Stripe, Block, Affirm, Brex, Ramp, Mercury, Increase, or Modern Treasury and want to own one end to end
- You built an issuing platform at a Marqeta, Lithic, Highnote, Galileo and want to be on the program side of it
Location
- San Francisco, CA
Work Type
- 5 days a week in office
Experience Level
- Senior-to-staff
- 6+ years
Salary/Compensations
- $190,000 - $295,000
Benefits
- Meaningful Start-up equity
- 100% health, vision & dental primary coverage
- 75% health, vision & dental dependent coverage
- Catered lunches
- $250/month Commuter benefit
- Parental leave
- Team building events & happy hours
- Flexible PTO with a minimum of 15 days off per year
- Apple equipment
- 401k plan
About the Company
- Cardless is building the infrastructure for the world's best companies to design, build, and launch financial products of their own.
- Companies like Coinbase and Bilt use Cardless to create credit cards that feel entirely their own.
- Our APIs and components shape the journey from the first application to every purchase, reward, and moment of support that follows, while we handle lending, compliance, and operations behind the scenes.
- In September 2025, we raised a $60 million Series C led by Spark Capital, bringing our total funding to $170 million.
- The team is over 70 people and scaling toward profitability by year-end 2026.
- We're looking for kind, humble people with high standards and low egos.
- We take the work seriously without taking ourselves too seriously.
- We see what could be improved, make it so, and leave every product, system, and team better than we found it.