**Overview**

The Windows Servicing & Delivery (WSD) team investigates and remediates security vulnerabilities and high-severity reliability issues across the Windows platform. The Storage & File Systems team within WSD owns NTFS, ReFS, Storage Spaces Direct (S2D), Windows Server Failover Clustering (WSFC), Cluster Shared Volumes (CSV), the Volume Shadow Copy Service (VSS), and the full Windows storage driver stack — from NVMe and iSCSI miniport drivers through to the file system minifilter layer and user-mode storage management APIs.

This **Senior Software Engineer** role sits at the intersection of kernel engineering and enterprise customer reliability. You will resolve the most complex ICMs escalated by top-tier enterprise and cloud customers — issues that have defeated Tier 1 and Tier 2 support and require deep ownership of source code, cluster state machines, and file system on-disk structures. Alongside security vulnerability work, you will own reliability fixe...