Microsoft AI (MAI) is seeking experienced Platform Engineers to join their team working on Copilot, their personal AI assistant. This role focuses on building APIs that support finetuning and deploying core Copilot experiences. The position requires 6+ years of experience in building scalable services and distributed systems, with expertise in languages like Python, C#, C++, Rust, or Java. The ideal candidate will work in Microsoft's Redmond office 3 days per week, contributing to a fast-paced environment where they'll collaborate with Product Management, Design, and AI Research teams. The role offers competitive compensation ranging from $137,600 to $267,000, comprehensive benefits, and the opportunity to work on cutting-edge AI technology. Microsoft's mission is to empower every person and organization globally, fostering a culture of inclusion, respect, and innovation. This position is perfect for someone passionate about AI development, with strong technical skills and the ability to work effectively in cross-functional teams.