Senior Software Engineer/ Principal Software Engineer - Copilot CLI

Building, evaluating, and iterating on agentic systems, including tool design, agent loops, benchmarking, and quality optimization Building delightful, high-performance terminal experiences, including terminal UIs, low-level primitives, and systems that feel fast, predictable, and polished Take ownership of critical product and platform areas of the Copilot CLI and shared agent runtime Set a high technical and quality bar for agentic systems and developer-facing tooling Design and ship performant, reliable terminal experiences that developers depend on for daily work Use data, benchmarks, and direct user feedback to guide iteration and investment Collaborate across org boundaries to enable other teams to build agentic products on top of a shared foundation Influence architecture, technical direction, and engineering standards beyond your immediate team Bachelor's Degree in Computer Science or related technical field AND 4+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python These requirements include but are not limited to the following specialized security screenings: 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#, Java, JavaScript, or Python OR equivalent experience. Hands-on experience building and operating generative AI or agentic systems in production, with direct ownership over quality, reliability, and iteration 5+ years of experience building and shipping customer-facing developer products, with depth across platform/foundation systems and user-facing experiences Strong product mindset with a track record of owning ambiguous problem spaces and driving them to high-quality outcomes Solid engineering fundamentals, including systems design, performance, and debugging in complex production environments Experience designing, running, and optimizing evaluations for agentic systems, including tools, prompts, and agent loops Experience building terminal user interfaces (TUIs) or working with low-level terminal primitives is a strong plus Experience contributing to or leading open-source projects at scale is a plus