Principal Experimentation Software Engineer

Overview
Microsoft Teams is at the heart of Microsoft’s vision for modern work, empowering people to connect, collaborate, and achieve more. As the hub for teamwork in Microsoft 365, Teams brings together people, content, and tools in one seamless experience, redefining how organizations communicate and collaborate at global scale. Our charter is to equip feature teams with deep customer insight through advanced data platforms and online A/B testing, enabling strategic, data driven decisions at scale. In this role, you will enable more than 100 engineering teams to measure the impact of features and processes while delivering world class operational monitoring and support for Microsoft Teams.

As a Principal Software Engineer on the Teams Experimentation Platform, you will build cutting edge systems that power safe, rapid learning loops, shape product strategy through high quality experimentation and metrics, and ship data driven experiences that delight customers. If you are passionate about solving complex distributed challenges, influencing product direction, and delivering technology that makes a global impact, this role is for you.

Our culture is inclusive, collaborative, and high energy. We thrive on diverse perspectives, teamwork, and a relentless focus on customer success. The collaboration space is growing rapidly, offering exceptional opportunities to learn innovative technologies and accelerate your career. Our mission is to empower the organization with deep customer insights and data-driven decision making, ensuring product quality and craft remain top priorities. We are a savvy group of Experimentation specialists, blending software engineering expertise with AI-driven acceleration and optimization to build reliable, scalable data systems—enabling the entire organization to innovate faster and deliver world-class experiences. Join us to shape the future of intelligent collaboration across industries and geographies.

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.

Responsibilities

• Design, develop and maintain components that power the Experimentation infrastructure for Microsoft Teams.
• Collaborate and influence designs, architectures, and best practices to support large-scale distributed systems and big data pipelines in our A/B testing platform.
• Analyze complex, high-volume, high-dimensional data systems for scalability.
• Understand and influence the product metrics in Experimentation AB across different surfaces where MS Teams is available.
• Collaborate closely with peers and other teams across a variety of technical, business and data backgrounds to find innovative solutions in a fast-paced environment.
• Leverage AI to accelerate and optimize experimentation workflows, data pipelines, and developer experiences, improving speed, quality, and reliability.
• Be a champion and influencer of our experimentation-driven culture within MS Teams.

Qualifications

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.
• 6+ years of experience designing and developing big data distributed architectures, scalable systems, and solving complex data problems at scale.
• 6+ years of experience working with complex data sets, data pipelines, and modern data platforms such as Microsoft Fabric, Databricks, or similar.
• 4+ years of experience building and managing A/B experimentation platform capabilities integrated with big data systems, as well as hands-on experience utilizing A/B testing.

Preferred Qualifications:

• Master's Degree in Computer Science or related technical field AND 8+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python
  • OR Bachelor's Degree in Computer Science or related technical field AND 10+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR equivalent experience.
• Deep experience in system design and architecture for large scale, distributed, highly available services, with a strong record of operational excellence, reliability, performance optimization, efficiency, and ownership of production systems.
• Proven ability to apply AI and machine learning for