Principal Architect Engineer

In the era of artificial intelligence (AI), efficiency across every layer of the compute stack—from software to hardware to physical infrastructure—is essential. As AI workloads grow rapidly, Microsoft continues to invest in systems that remain reliable, cost‑effective, and sustainable. This role is an opportunity for individuals who are motivated by complex systems challenges and interested in shaping the future of AI and cloud computing. As a Principal Architect in the One Fleet Efficiency (OFE) organization, you will partner across engineering teams and organizational boundaries to deliver architectural improvements that strengthen the efficiency of AI and cloud software, hardware, and infrastructure. Your work will span optimizing inference and training workloads, influencing the design of next‑generation datacenters, and contributing to advancements in cloud platforms. This role provides the opportunity to lead high‑impact technical initiatives, develop insight across the entire AI stack—from model to silicon to datacenter—and influence Microsoft's long‑term infrastructure strategy.