Microsoft is seeking a Principal Software Engineer to help build the AI infrastructure powering Microsoft 365, Copilot, and related services. This on-site role is part of the M365 Core AI Inferencing Engineering team within CAP, located in Redmond, Washington, United States. You will partner with teams across CAP and Microsoft to design, implement, and deliver an LLM API management service used by millions of customers, with a focus on compliance, reliability, and cost efficiency. You will drive cost and availability optimization, coach your team to build and run large-scale platforms and experiences used by hundreds of millions of users daily, and collaborate with product teams across Power Platform, BizApps, and Microsoft. Required qualifications include a Bachelor's degree in Computer Science or related field and 6+ years of engineering experience with languages such as C, C++, C#, Java, JavaScript, or Python, or equivalent. You must be able to meet Microsoft Cloud Background Check requirements. Preferred qualifications include a Master’s degree with 6+ years of experience or a Bachelor’s with 8+ years, strong coding skills in Python and/or C#/.NET, and experience with high-scale services, LLMs, orchestration, embedding models, and vector databases, as well as distributed systems and message-based architectures and OLTP/OLAP storage. Demonstrated leadership delivering projects across multiple engineering organizations is valued. The typical base pay range for Software Engineering IC5 in the United States is USD 142,800 to USD 274,800 per year, with higher ranges in the S

Microsoft is seeking a Principal Software Engineer to help build the AI infrastructure powering Microsoft 365, Copilot, and related services. This on-site role is part of the M365 Core AI Inferencing Engineering team within CAP, located in Redmond, Washington, United States. You will partner with teams across CAP and Microsoft to design, implement, and deliver an LLM API management service used by millions of customers, with a focus on compliance, reliability, and cost efficiency. You will drive cost and availability optimization, coach your team to build and run large-scale platforms and experiences used by hundreds of millions of users daily, and collaborate with product teams across Power Platform, BizApps, and Microsoft. Required qualifications include a Bachelor's degree in Computer Science or related field and 6+ years of engineering experience with languages such as C, C++, C#, Java, JavaScript, or Python, or equivalent. You must be able to meet Microsoft Cloud Background Check requirements. Preferred qualifications include a Master’s degree with 6+ years of experience or a Bachelor’s with 8+ years, strong coding skills in Python and/or C#/.NET, and experience with high-scale services, LLMs, orchestration, embedding models, and vector databases, as well as distributed systems and message-based architectures and OLTP/OLAP storage. Demonstrated leadership delivering projects across multiple engineering organizations is valued. The typical base pay range for Software Engineering IC5 in the United States is USD 142,800 to USD 274,800 per year, with higher ranges in the S