Brex
Senior
Own customer-facing backend features end-to-end at Brex's finance platform
Interview for a Senior Backend Software Engineer role on Brex's Product Engineering team, building customer-facing banking and spend-management features end-to-end. Expect a bar on backend system design, data modeling, and operability, plus close collaboration with Sales/Support to translate customer needs into shipped features.
Step into this interview
Free · a live voice mock calibrated to this exact role
What this interview tests
- Backend system design for scalable, customer-facing financial products
- Data modeling with SQL/NoSQL databases
- End-to-end ownership: from user experience through data models to operability and metrics
- Cross-functional collaboration with Sales/Support to surface and prioritize customer needs
- Code quality and engineering rigor in Java/Kotlin/Python
Common question themes
Design a scalable backend service for a specific Brex-like banking/spend feature
Walk through a backend system you owned end-to-end, including post-launch metrics and operability
How would you gather requirements from Sales/Support and turn them into a technical spec
Tradeoffs in choosing SQL vs NoSQL for a given data model
How do you 'tune and polish' a feature to a high quality bar before shipping