Senior Software Engineer, AI — Ecosystem at Brex

Brex

San Francisco, California, United States·13h ago

SeniorFull-timeRustGitAI

Salary Range

$132,600 - $179,400 /year

Estimated

This salary is estimated based on similar roles. The actual salary may vary.

About the Role

We are looking for a Senior AI Integration Engineer to join Brex's AI Engineering team. This role involves being the technical owner for Brex's external AI ecosystem, focusing on integrations, surfaces, and standards that allow customers to interact with Brex through third-party assistants and platforms.

Key Responsibilities

→Own Brex's MCP Apps for OpenAI, Claude, and other embedders, including roadmap decisions across core and long-tail partners.
→Define the technical, UX, and reliability standards for how Brex surfaces and operates within external AI assistant ecosystems.
→Design and maintain secure, auditable integration patterns, including permissions, read/write access, and acting on behalf of users across third-party environments.
→Build and operate production-grade integrations that remain resilient amid evolving platforms, unpredictable clients, and shifting constraints.
→Partner cross-functionally with Security, Platform, Sales, Enablement, and internal agent teams to ensure integrations are safe, valuable, and well-supported.
→Serve as the center of excellence for reusable AI capabilities across Brex, defining and evangelizing standards, patterns, and shared components that power AI functionality both within the Brex platform and across external ecosystem integrations.

Requirements

✓Experience building and owning production software, including systems that integrate with or depend on third-party platforms.
✓Demonstrated technical ownership for user-facing products with real external customers.
✓Deep experience with identity, authentication, permissions, and secure data access across system boundaries.
✓Proven ability to ship and operate reliable integrations with external APIs and clients outside your control.
✓Strong product judgment, written communication, and end-to-end ownership, including accountability for quality and launch readiness.