Senior Software Engineer

Consumer Copilot Security is at the core of Microsoft's mission to deliver trusted, human-centered AI experiences. We make security and resilience intrinsic to every Copilot interaction—across devices, platforms, and ecosystems. Our work spans secure identity flows, defenses against emerging threats like prompt injection, and privacy-first systems that scale globally. We are looking for a Senior Software Engineer to join our team. Copilot is becoming an autonomous system that reasons, plans, and acts on behalf of hundreds of millions of users—across consumer and enterprise experiences, surfaces, and modalities. It books meetings, drafts documents, executes multi-step workflows, and orchestrates actions across tools, data, and services. The scope and autonomy are expanding fast. So is the trust surface. Copilot Security & Trust Engineering makes Copilot a trusted companion—safe to use without fear as autonomy becomes the default. The Identity & Isolation team owns the foundational systems that make this possible: authentication and identity experiences that reduce friction and increase trust, workload isolation and adaptive sandboxing that constrain agent authority and blast radius, and agentic access control that governs what Copilot can do, with what data, and on whose behalf—continuously and at runtime.