Microsoft Advertising is seeking a Senior Software Engineer to join their Beijing team, focusing on developing scalable APIs for ad delivery across multiple channels. This role combines cutting-edge advertising technology with distributed systems engineering, offering an opportunity to work on search, shopping, and conversational AI advertising scenarios. The position requires expertise in backend development, distributed systems, and a strong foundation in computer science. The successful candidate will work on high-impact projects, supporting premium publishers and building robust advertising solutions. Microsoft offers comprehensive benefits, including industry-leading healthcare, educational resources, and work-life balance. With a hybrid work environment allowing up to 50% work from home, this role provides flexibility while working on challenging technical problems in the advertising technology space. The position involves minimal travel (0-25%) and offers the stability of working for a global technology leader while contributing to innovative advertising solutions.