Principal Software Engineer (AI-Enabled Platforms & Tools)

**Description**

This is not a maintenance role. This is a reinvention role.

Leidos is seeking a Principal Software Engineer to provide technical leadership for the design and delivery of AI-enabled software platforms and developer tools that support modernization of mission-critical systems.

This Principal Software Engineer role is responsible for system-level technical leadership and defines architectural direction within their domain, resolves complex cross-cutting technical challenges, and shapes how teams design, build, and operate software. The Principal Engineer is a hands-on technical leader who influences outcomes through technical excellence, architectural clarity, and mentorship, not through formal management authority.

This is a role for builders who bias toward action, who believe disruption can coexist with rigor, and who want to apply cutting-edge AI to the problems that matter most.

**Mission Context**

Our teams moder...