Backend engineer to build correctness-critical money-movement systems on Ramp's Payments and Banking platform

Ramp's Payments and Banking team is hiring a backend engineer (5+ years) to design large-scale systems for money movement across domestic/international currencies, stablecoins, and rewards points, connecting to banking rails from small-business accounts to enterprise treasury and crypto wallets. The interview centers on systems design for correctness-critical financial infrastructure and comfort owning ambiguous, high-stakes problems end to end.

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What this interview tests

Systems design for correctness-critical financial infrastructure
Building abstractions across diverse money rails (fiat, crypto, rewards points)
Reliability and reconciliation in payment/banking systems
Owning ambiguous problems end-to-end (architecture through production)
Integrating with third-party banking/payments partners

Common question themes

Design a backend system for money movement with strict correctness guarantees

How would you build one abstraction that handles both bank transfers and crypto transactions?

Tell me about a time you found and fixed a subtle correctness bug in a financial system

How do you approach an ambiguous, high-stakes technical problem with no clear spec?

How would you integrate with a new third-party banking or payments partner?

Walk me through how you'd design for reconciliation and auditability at scale

How candidates describe it

Real Software Engineer interview stories — retold from candidates' public write-ups, with sources.

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