We are building the next-generation real-time enforcement platform that protects users, advertisers, and the integrity of Microsoft’s Ads and content ecosystems. This infrastructure processes and evaluates hundreds of billions of signals each day, applying safety and policy decisions with millisecond latency and global reliability.

As a Principal Software Engineer, you will define and drive the architecture of the core systems behind this platform—spanning real-time decision services, streaming pipelines, and ML inference integration. You will also help lay the foundation for emerging AI-enabled enforcement flows, including agentic workflows that reason, adapt, and take multi-step actions using large language models and learned policies.

This is a hands-on IC leadership role for someone who thrives at the intersection of deep system design, web-scale performance, and long-term platform evolution—and who is both curious about how AI can augment infrastructure, and pragmatic about where and how it should.

 

Microsoft’s 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.