Senior Software Engineer

Impbus is a mission-critical, high-throughput real-time bidding (RTB) service at the core of Microsoft Ads. It processes millions of auction requests per second, executes complex auction logic under strict latency constraints, and directly impacts revenue, win rate, partner satisfaction, and platform reliability.

This role owns core architectural and technical evolution of Impbus, focusing on modernization, performance, scalability, experimentation infrastructure, and operational excellence. The position requires deep expertise in low-latency distributed systems, strong leadership in large-scale refactoring and platform modernization, and close collaboration across engineering, data science, experimentation, and business stakeholders.

The engineer in this role drives initiatives with company-level impact, ensuring Impbus can continue to scale, evolve, and support future Microsoft Ads growth.

As a wider business, 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.

• Own technical direction and execution for core components of Impbus, a high-scale, latency-sensitive real-time bidding service at the heart of Microsoft Ads.
• Lead design and implementation of scalable, high-performance backend systems operating under strict latency and reliability requirements.
• Drive platform modernization and long-term sustainability of critical services, improving code quality, maintainability, and operational safety.
• Ensure performance, scalability, and stability of the service as traffic, data volume, and business requirements continue to grow.
• Define and evolve instrumentation, observability, and experimentation capabilities to support data-driven decision making and safe production changes.
• Collaborate closely with cross-functional partners (engineering, data science, experimentation, product, and infrastructure) to align technical solutions with business goals.
• Provide technical leadership and mentorship, influencing architecture decisions and engineering best practices across teams.

Required Qualifications:

• Solid experience with systems programming languages (such as C++ or similar), and understanding of performance and reliability considerations.
• Experience working on high-throughput, production systems where scalability, latency, and stability are critical.
• Demonstrated ability to design, evolve, and maintain complex systems over time.
• Experience collaborating with cross-functional teams to deliver solutions aligned with business needs.
• Problem-solving skills and ability to analyze and address performance or reliability issues in production environments.

Microsoft is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to age, ancestry, color, family or medical care leave, gender identity or expression, genetic information, marital status, medical condition, national origin, physical or mental disability, political affiliation, protected veteran status, race, religion, sex (including pregnancy), sexual orientation, or any other characteristic protected by applicable laws, regulations and ordinances. If you need assistance and/or a reasonable accommodation due to a disability during the application or the recruiting process, please send a request via the Accommodation request form.

Benefits/perks listed below may vary depending on the nature of your employment with Microsoft and the country where you work.

This position will be open for a minimum of 5 days, with applications accepted on an ongoing basis until the position is filled.

Microsoft is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to age, ancestry, citizenship, color, family or medical care leave, gender identity or expression, genetic information, immigration status, marital status, medical condition, national origin, physical or mental disability, political affiliation, protected veteran or military status, race, ethnicity, religion, sex (including pregnancy), sexual orientation, or any other characteristic protected by applicable local laws, regulations and ordinances. If you need assistance with religious accommodations and/or a reasonable accommodation due to a disability during the application process, read more about requesting accommodations.