Principal AI Engineer

Overview OneDrive & SharePoint (ODSP) Applied Scienceu2019s mission is to invent the AIu2011native knowledge substrate for Microsoft 365u2014turning the worldu2019s largest enterprise content platform (ODSP) into a foundation for specialized, enterpriseu2011ready, planetu2011scale AI and agents. Weu2019re building durable memory and statefulness for AI, advancing trustworthy solutions for LLMs to interact with data, and optimizing endu2011tou2011end systems for quality, cost, and latency at massive global scale. We are seeking a passionate, creative, and analytical individual contributor with expertise in training or fine-tuning large language models, including both text and multimodal systems, reinforcement learning, agentic AI architectures, and inference optimization. As a Principal Artificial Intelligence Engineer , you will collaborate with a team of passionate engineers and applied scientists, driving ideas to impactful results in a fast-paced environment. You will work on designing, building, and deploying large-scale machine learning and agentic systems, with an emphasis on production-grade solutions involving data pipelines, large-scale training, model serving, and performance optimization. You are experienced in machine learning engineering from ideation and algorithm selection to architecture and implementation, to deployment and continuous improvement. Microsoftu2019s mission is to empower every person and every organization on the planet to achieve more. As employees we come together with a growth mindset, innovate to empower others, and collaborate to realize our shared goals. Each day we build on our values of respect, integrity, and accountability to create a culture of inclusion where everyone can thrive at work and beyond. Responsibilities + Design and develop advanced artificial intelligence (AI) models and agentic systems for real-world applications. + Own and drive end-to-end model training, including data pipeline design, distributed training optimization, and performance evaluation. + Stay up to date with the latest advancements in large language models (LLM), natural language processing (NLP), deep learning, search, and AI research. + Collaborate closely with applied scientists and other engineering teams to productionize models, build scalable, robustpipelines,and provide support for in-production AI models and agents. + Contribute to the team's strategic vision, the organizationu2019s scientific direction, and align them with the overall companyobjectives,including roadmaps and long-term vision. + Conduct applied science experiments,createandvalidatemetrics, develop machine learning pipelines and modeling algorithmsin areas including LLMs, NLP, and Information Retrieval. Qualifications Required Qualifications: + Bachelor's Degree in Computer Science or related technical field AND 6+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python + OR equivalent experience. + Proficiency with machine learning frameworks such as PyTorch or scikit-learn. + 3+years of experiencein coding and design, specifically in the development of AI models and agents for scaled production services. + 3+years of experiencein shipping applied research to production, highlightinga track recordof combining coding skills with advancedexpertisein AI model development. Other Requirements: Ability to meet Microsoft, customer and/or government security screening requirements are required for this role. These requirements include but are not limited to the following specialized security screenings: + Microsoft Cloud Background Check : This position will be required to pass the Microsoft Cloud background check upon hire/transfer and every two years thereafter. Preferred Qualifications: + 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++, C#, Java, JavaScript, or Python + OR Bachelor's Degree in Computer Science or related technical field AND 12+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python + OR equivalent experience. + 5+years of experiencein coding and design, specifically in the development of AI models and agents for scaled production services. + 5+years of experiencein shipping applied research to production, highlightinga track recordof combining coding skills with advancedexpertisein AI model development. Software Engineering IC5 - The typical base pay range for this role across the U.S. is USD $139,900 - $274,800 per year. There is a different range applicable to specific work locations, within the San Francisco Bay area and New York City metropolitan area, and the base pay range for this role in those locations is USD $188,000 - $304,200 per year. Certain roles may be eligible for benefits and other compensation. Find additional benefits and pay information here: This position will be open for a minimum of 5 days, with applications accepted on an ongoing basis until the position is filled. Microsoft is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to age, ancestry, citizenship, color, family or medical care leave, gender identity or expression, genetic information, immigration status, marital status, medical condition, national origin, physical or mental disability, political affiliation, protected veteran or military status, race, ethnicity, religion, sex (including pregnancy), sexual orientation, or any other characteristic protected by applicable local laws, regulations and ordinances. If you need assistance with religious accommodations and/or a reasonable accommodation due to a disability during the application process, read more about requesting accommodations. (

Created: 2026-01-12