Principal Software Engineer

About the role

What happens when AI agents can rewrite millions of lines of code orders of magnitude faster than humans can review them? That question drives the Future of Scalable Software Engineering (FoSSE) team in Microsoft's CoreAI division. We combine AI agents with static analysis, testing, and formal verification to make large-scale software transformation practical and trustworthy, and we design tools that spend scarce human attention where it matters most.

What you'll do

• Lead the design and delivery of agentic tools and infrastructure for one or more of our problem areas (such as migration at scale, language modernization
• Set technical direction for a problem area end to end, from architecture to production adoption
• Architect systems that let a small expert team drive transformations across hundreds of millions of lines of code
• Define the validation strategies and quality bars that make agent-produced changes trustworthy at scale
• Lead cross-organizational efforts with partner teams, such as Windows, Azure, compiler, and security teams, and with the research community

What you need

• 10–18 years in software engineering
• C++
• C#
• C
• Rust
• LLMs
• Azure
• B.Sc or PhD or B.Tech or B.E. or BCA

Good to have

• Lean