Software Engineer II, Operational AI

Engineering at Brex

Engineering at Brex is about building systems that scale with speed and intention. Our teams span Software, Data, Security, and IT, and operate with high autonomy and deep collaboration. We tackle hard technical problems, own our outcomes, and push for excellence at every level — from architecture to deployment. It’s an environment where engineering is a craft, and builders become leaders.

What you’ll do

As a Software Engineer on our Operational AI team, you will work across the entire Brex stack to build solutions that will quickly and efficiently get credit and risk-worthy customers through the onboarding and activation funnel while decreasing time-to-ramp for new customers.

Where you’ll work

This role will be based in our São Paulo office. We are a hybrid environment that combines the energy and connections of being in the office with the benefits and flexibility of working from home. We currently require a minimum of two coordinated days in the office per week, Wednesday and Thursday. Starting February 2, 2026, we will require 3 days per week in the office - Monday, Wednesday and Thursday. As a perk, we also have up to four weeks per year of fully remote work.

Responsibilities:

• Collaborate with engineers across the company to build new features and products end-to-end.


• Work on automations for KYC and Underwriting for new customers.


• Contribute to our core internal AI agent platforms, shaping the foundation for future AI development at Brex.


• Own problems end-to-end, from user experience and data models to scalability, operability, and ongoing metrics.


• Tune and polish features to a high degree of excellence.

Requirements:

• 3+ years of full-time experience with a focus on Full-stack development


• Previous experience in AI native projects.


• Experience architecting, developing, and testing client-side code end-to-end.


• A high bar for engineering standards and a willingness to learn.


• Strong written and verbal English communication and interpersonal abilities


• Strong curiosity for digging deep into the technical problems, and strong ownership capable of delivering high quality solutions