Principal Software Engineer, AI

The NL2KQL (Natural Language to Kusto Query Language) team builds AI powered capabilities that enable security practitioners to express investigative intent in natural language and translate it into precise, executable KQL queries. Our work sits at the intersection of rigorous software engineering, applied machine learning, large language models, and security analytics, powering critical experiences across Security Copilot and Microsoft security products. The team’s mission is to significantly improve analyst productivity, lower the barrier to advanced threat hunting, and enable scalable, reliable natural language interaction with large and complex security datasets used in real world defense scenarios. We are seeking a Principal Software Engineer, AI to play a technical leadership role in shaping and building the next generation of AI agents and Security Copilot skills. In this role, you will define technical direction for high impact systems, lead complex cross team initiatives, and drive end to end execution of AI capabilities that operate at Microsoft scale and directly influence how security analysts detect, investigate, and respond to threats. You are expected to set engineering standards, make durable architectural decisions, mentor senior engineers, and deliver solutions whose impact spans multiple products and organizations, with clear customer and business outcomes.