Senior Software Engineer, AI - Brex Assistant

Proven experience building and owning user-facing software products in complex, real-world domains.

Established experience as a Staff / Senior Staff engineer or hands-on Tech Lead; prior people management experience is a strong plus.

Strong product judgment: a track record of making hard tradeoffs, sticking to them, and delivering outcomes under real constraints.

Experience building systems that must be reliable despite messy inputs — whether from users, non-deterministic systems, or both.

Ability to independently own UX and roadmap decisions, build simple and robust user-centric software, and mentor junior engineers through strong product and technical guidance.

The expected salary range for this role is $192,000 - $240,000. However, the starting base pay will depend on a number of factors including the candidate’s location, skills, experience, market demands, and internal pay parity. Depending on the position offered, equity and other forms of compensation may be provided as part of a total compensation package.

Please be aware, job-seekers may be at risk of targeting by malicious actors looking for personal data. Brex recruiters will only reach out via LinkedIn or email with a

brex.com

domain. Any outreach claiming to be from Brex via other sources should be ignored.

You’ll be the senior technical owner of the Brex Assistant: a consumer-facing conversation product and will lead the rollout of the Assistant experience — defining what “great” looks like, sequencing capabilities deliberately, and shipping a product that is reliable, opinionated, and genuinely useful. You’ll write a significant amount of production code, set the quality bar, and shape how agentic systems integrate with Brex’s core workflows.

This is a deeply product-driven role. Success is measured by better outcomes for customers — higher-quality expense documentation, stronger policy compliance, and less time spent clicking around Brex.com — not by novelty or research output.

Own the end-to-end conversational experience for the Brex Assistant, including both outbound system-initiated interactions and inbound mobile chat.

Act as the technical and product bar-setter for the team, making and executing hard sequencing decisions for assistant capabilities (e.g., memory, merchant data, preferences).

Write high-quality, production-grade code while shaping architecture and interfaces for agentic workflows, partnering closely with Spend/Expense teams to influence core Brex workflows.