Principal Software Engineer (Microsoft 365 / M365)

Quick Facts

• Role: Principal Software Engineer (Authentication/Authorization)

• Focus: Secure, large-scale distributed authentication and authorization platform for Microsoft 365 (Substrate)

Description

Lead the design, development, and deployment of a feature area within the Core Authentication platform. Drive secure-by-design evolution of authentication and authorization layers, including modern protocols and next-generation cryptography, while ensuring compliance across commercial and government cloud environments. Serve as a technical leader for complex cross-team initiatives, incident resolution, and root-cause reliability improvements.

Responsibilities

• End-to-end ownership of an authentication/authorization feature area (design, development, deployment, standards, and code/design reviews)

• Lead complex initiatives across Core Authentication and dependent partner teams

• Apply threat modeling and secure-by-design practices; ensure compliance requirements are met

• Evolve the authentication stack using modern protocols and next-generation cryptography

• Participate in on-call; resolve complex production issues and perform root-cause analysis

• Mentor engineers and raise the technical bar

Benefits

• Base pay range (U.S.): USD $142,800–$274,800 per year (location-dependent ranges apply)

• Additional benefits and compensation may be available