The One Engineering System (1ES) team is responsible for enabling the world's leading engineering teams with best-in-class tools and systems that help them ship products their customers love. 1ES develops and operates a set of engineering tools and services including build, verification services, code review tools, data analysis, and machine learning services - all working towards a unified engineering system for internal Microsoft needs. Distributed build, static analysis, test and release are at the center of Microsoft 1ES and are helping major groups within the company deliver features faster and with better quality. Our services are used by tens of thousands of developers, and we build, analyze, test and release millions of projects daily in a distributed service running at scale in multiple data centers across the world. As a Software Engineer II in 1ES, you will define the future of engineering systems and developer productivity. You will build high-scale distributed build and test that improve speed, reliability, usability, security and auditing. You will use and contribute to Machine Learning (ML) and Artificial Intelligence (AI) systems to improve engineer productivity.