Lena Hall is a Director of Engineering at Microsoft. She is leading a team and technical strategy for product improvement efforts across Big Data services at Microsoft, as a part of Cloud Advocacy in Azure Engineering. Lena has more than 10 years of experience in software engineering with a focus on distributed cloud programming, real-time system design, highly scalable and performant systems, big data analysis, data science, functional programming, and machine learning. Previously, she was a senior software engineer at Microsoft Research. She’s co-organizes a conference called ML4ALL, and is often an invited member of program committees for conferences like Kafka Summit, Lambda World, and others. Lena holds a Master’s degree in computer science.