Own frontend features end-to-end on Brex's finance platform, from experiment design to polish

Brex is hiring a Senior Frontend Engineer (Vancouver, hybrid 3 days/week) to build and own customer-facing features across the full stack with a frontend focus, working directly with Sales/Support to understand customer needs and running experiments to improve the experience. Expect depth on modern frontend architecture (React, TypeScript, ES6+) plus ownership and product-sense questions.

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What this interview tests

Modern frontend architecture: React, TypeScript, ES6+, Webpack
End-to-end ownership: UX, data models, scalability, operability, metrics
Client-facing product experimentation and iteration
Cross-functional collaboration with Sales/Support to surface customer needs
Full-stack comfort beyond frontend

Common question themes

Walk through a frontend feature you owned end-to-end, from customer problem to shipped metric

How do you architect and test client-side code for a financial product where correctness matters

Describe a time you worked directly with Sales or Support to uncover a customer need and turned it into a feature

How would you design and evaluate an experiment to improve a customer-facing flow

Tell me about a time you pushed a feature from 'working' to genuinely polished

How do you approach a task that requires touching backend or full-stack code outside your comfort zone

How candidates describe it

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