Senior Software Engineer, AI - Simulation
BrexSan Francisco, California, United States
Posted February 27, 2026
192000 - 240000 USD
Full Time
About the Company
Brex is the AI-powered spend platform that helps companies spend with confidence with integrated corporate cards, banking, and global payments.
Job Description
Brex is seeking a Senior Software Engineer, AI - Simulation to own Brex's simulation and validation platform for AI-powered products. The role involves building a system that uses synthetic data and scenario generation to continuously stress-test Brex's AI products and ensure that teams can ship with confidence.
Requirements
- Experience building and owning complex software systems where correctness, reliability, and failure modes are critical.
- Experience designing test, simulation, or validation systems for non-deterministic or high-stakes environments.
- Strong systems thinking, with the ability to decompose complex problems and reduce incidental complexity.
- Demonstrated ability to influence product architecture through quality, reliability, and launch-readiness constraints.
- Comfort operating with real authority and cross-team influence, including blocking launches and partnering across seniority levels to raise the quality bar.
Benefits
- Generous Paid Time Off
- 401k Matching
- Retirement Plan
- Four Day Work Week
- Generous Parental Leave
- Tuition Reimbursement
- Relocation Assistance