Senior Software Engineer

Search is being transformed by AI – join us to build AI-powered search experiences used by hundreds of millions of people worldwide. The Core Search & AI team in Microsoft AI (MAI) develops and operates the foundational systems behind Search, Grounding, and Agentic Search. You will work on large-scale systems that combine web-scale retrieval, advanced ranking models, and real-time inference to deliver relevant, trustworthy, and high-quality AI experiences. As a Senior Software Engineer in the Core Search & AI team, you will build and operate next-generation AI infrastructure for Search, Grounding, and Agentic Search. You will develop scalable systems for distributed data pipelines, LLM and SLM training (including SFT and RL), high-throughput inference, evaluation frameworks, and observability. You will collaborate with engineering, research, and product teams to deliver reliable, measurable, and high-performing AI solutions, and use data to guide technical decisions, investigate issues, and improve live-site quality. This opportunity will allow you to deepen your expertise in distributed AI infrastructure, gain experience with production-scale AI workloads, and expand your ownership of end-to-end service quality and operational excellence.