AI Engineer, EcosystemActive$171K–$240K

The opportunity

Brex is the intelligent finance platform that enables companies to spend smarter and move faster in more than 200 markets. By combining global corporate cards and banking with intuitive spend management, bill pay, and travel software, Brex enables founders and finance teams to…

What you'll do

  • Own Brex's MCP Apps for OpenAI, Claude, Slack, 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.

What they're looking for

  • 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, and secure data access across: system boundaries, including OAuth and role-based access control (RBAC) for permissions.
  • Proven ability to ship and operate reliable integrations with external APIs and clients outside your control.