Principal Software Engineer - Platform Architect

Define long-term technical strategy: Set vision and direction for Teams API and AI platform initiatives, including agent-to-agent protocols, composable LLM pipelines, and developer extensibility. Architect complex, scalable systems: Lead design for end-to-end scenarios involving distributed microservices, multi-tenant routing, LLM orchestration, tool integration, and secure API endpoints. Build hyperscale LLM-enabled infrastructure: Craft systems to support developer-deployed AI agents, multi-step workflows, data connectors, and runtime MCP patterns across global Teams environments. Design APIs & SDKs for AI applications: Define developer-facing components that allow ISVs to deploy, configure, and manage LLM-powered agents and tools within Teams. Drive engineering culture: Champion scalability, reliability, observability, security, operational excellence, and customer obsession. Collaborate broadly: Partner with leadership, cross-functional teams (Research, Security, UX), and ecosystem stakeholders to deliver unified, strategic outcomes. Hands-on leadership: Develop, debug, optimize, and maintain platform features end-to-end—from coding to deployment and operational excellence. Operational responsibility: Troubleshoot complex infrastructure issues at scale, proactively reduce incidents, and maintain oncall readiness. Mentor and foster growth: Build a healthy, inclusive environment, guiding engineers toward excellence in distributed platforms and AI infra. Bachelor's Degree in Computer Science or related technical field AND 10+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR equivalent experience. Master's Degree in Computer Science or related technical field AND 8+ years technical engineering experience with coding in languages including, but not limited to, C#, C++, or Rust OR equivalent experience. 10+ years of experience focused on advanced software development and architecture, building commercial-grade, high-availability services. 10+ years of experience driving software platform architecture projects from both a technical and functional perspective, guiding complex projects from planning through execution and service operations. Demonstrated commitment to software engineering excellence. Analytical and problem-solving skills, with a history of navigating significant technical challenges, emphasizing a continuous release mindset and service operation in a dynamic environment. Ability to lead in a fast-paced, customer focused, and data-driven environment. A decisive, self-directed, collaborative, and innovative approach to projects. Experience in LLM infrastructure and paradigms: Agent-to-agent communication protocols and orchestration, Model Context Protocol, Integration of third-party tools, APIs, and data sources into LLM pipelines. Secure execution of LLMs in cloud environments, multi-tenant isolation, throttle control.