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Microsoft Corporation Logo Microsoft Corporation · IT - Software Development

Principal Software Engineer

United States, Redmond 139900.00 - 274800.00 USD / Year · Job Posted March 19, 2026
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Job Description

Core AI is at the forefront of Microsoft’s mission to redefine how software is built and experienced. We are responsible for building the foundational platforms, services, programming models, and developer experiences that power the next generation of applications using Generative AI. Our work enables developers and enterprises to harness the full potential of AI to create intelligent, adaptive, and transformative software. We build platforms to handle AI workloads for customers and have a significant business impact on products that ship across all Microsoft groups as well as enterprise customers. We are looking for a Principal Software Engineer who will define the future of engineering systems and developer productivity. In this role, you will build high-scale distributed services to support large scale state of the art model training and inference.

Job Responsibility

  • Work on the architecture, design and development of the core compute services powering AzureML to tackle challenging AI problems using state-of-the-art LLM models such as GPT5 and OSS models
  • Work on the architecture, design, and development of the core AI Infrastructure services that support large scale AI training and inferencing
  • Develop, test, and maintain backend services written in C#, Go, Rust, C++, hosted on Kubernetes clusters and Docker containers
  • Develop and operate training/inference infra framework and machine learning systems
  • Enhance systems and applications to ensure high stability, efficiency, & maintainability, low latency, tight cloud security
  • Provide operational support and DRI responsibilities for the product
  • Collaborate closely with engineers, data scientists within the team, internal Microsoft Research teams and external enterprises to build better solutions together
  • Provide vision, expertise, and technical leadership to other team members

Requirements

  • 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#, Rust, Go, Java, or Python OR equivalent experience
  • 3+ years of experience operating and designing systems which support large model training
  • 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

Nice to have

  • Knowledge and first-hand experience with large model training system
  • Experience in distributed systems and architecture
  • AI infrastructure and workload knowledge
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