Microsoft Entra ID (formerly Azure AD) is seeking a Senior Software Engineer to join their Users and Multi-Tenant experiences team within the Identity and Access Management division. This role focuses on building and operating critical authentication, authorization, and directory services used by millions of Azure, Office 365, XBOX, and Windows users worldwide. The position involves developing solutions for managing users and tenants across various customer segments, from small businesses to multinational organizations. The team operates in a diverse, multicultural environment with strong emphasis on accountability and growth opportunities. The role requires expertise in high-throughput and multi-tenant services, with responsibilities including technical leadership, system design, and collaboration across global teams. Microsoft's security-first approach and mission to empower every person and organization make this an impactful position for those passionate about large-scale distributed systems and identity security. The role offers comprehensive benefits and operates from Dublin, Ireland, with some travel requirements (0-25%).