Senior Software Engineer, AI - Simulation

Brex is the AI-powered spend platform that helps companies spend with confidence. We are looking for a Senior Software Engineer, AI - Simulation to evolve and scale a simulation and validation platform to continuously stress-test Brex’s AI products.

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

• Competitive salary range: $192,000 - $240,000
• Equity and other forms of compensation
• Up to four weeks per year of fully remote work
• Hybrid work environment
• Three coordinated days in the office per week