New

Principal Software Engineer - CoreAI

Microsoft
$139,900.00 - $274,800.00 / yr
United States, Washington, Redmond
Jan 25, 2026
Overview Join our team withinCoreAI, where we are building theAI data-planethat powersall LLMinferencing workloads across Microsoft and Azure customers-fromcutting-edgestartups to Fortune 500 enterprises. Ourconverged AI fabricdelivers inference capabilities for all LLMs inMicrosoft catalog, including OpenAI,Anthropic,Mistral, Cohere, Llama, and more. As aPrincipal Software Engineer-CoreAI, you will shape the future of one of thelargest and fastest-growing services in Azure, foundational to Microsoft's AI strategy. Our mission is to serve models at scale-reliably, efficiently, and with ultra-low latency-enabling a rich set of AI-powered product experiences. This is a rapidly evolving space with immense opportunities to learn, innovate, and drive industry-wide impact! Responsibilities Build and scale the core serving systems and smart request routing and distribution for all LLMs (OpenAI, Mistral, Grok, DeepSeek and many others). Learn, innovate and build cutting edge innovations in the AI space collaborating with the best and brightest leading it. Ship new product features and improvements at a high velocity. Design, implement and deliver AI services to support product offerings for large-scale LLM serving. Collaborate closely with product management and partner teams to align technical direction with business goals. Coach and grow team members with design, code reviews, and mentorship serving as a role model leading product quality and velocity. Engage with customers to gather feedback and resolve complex issues. Innovate technical solutions, and patterns that will improve the availability, reliability, efficiency, observability, and performance of products. Embody ourcultureandvalues Qualifications Required/Minimum 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#, or Java OR equivalent experience. Other Requirements Abilityto meet Microsoft,customerand/or government security screening requirements arerequiredfor this role. These requirements include, but are not limited to the following specialized security screenings: Microsoft Cloud Background Check:This position will berequiredto pass the Microsoft Cloud background check upon hire/transfer and every two years thereafter. Preferred/Additional Qualifications 4+ years of design and problem-solving experience, with understanding of system performance, scalability, and engineering best practices. Understanding of distributed systems specifically in request serving at scale; including high-performance storage, distributed databases, and networking across global-scale infrastructures. Experience shipping with high velocity and iterative approaches to track a north star. Demonstrated experience in building high-quality, reliable systems at scale. Ability to lead complex technical initiatives that span multiple teams and disciplines. Customer-obsessed approach to problem solving, with empathy and a drive to deliver impactful solutions. #AIPLATFORM #azureai #coreai #genai #aiinference 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: https://careers.microsoft.com/us/en/us-corporate-pay 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.