Alexis Perrier My name is Alexis Perrier. Father of 3, formerly Parisian and Bostonian since 2010. PhD in signal processing at Telecom-ParisTech, followed by 20 years of software development, consulting, project management and start ups. I’ve worked in many industries including telecommunications, recruitment, higher education and healthcare.

I am the lead data scientist at Docent Health, one of the most exciting start-up in Boston. We’re improving patient experience in hospitals with a magic mix of real human interventions and Data Science: NLP, sentiment analysis, topic modeling and predictive modeling.

I recently wrote a book titled Effective Amazon Machine Learning published by packt publishing in April 2017 and available on Amazon.

A long time ago, in a galaxy far far away, I worked on the Stochastic Gradient in a signal processing context to improve echo cancellation. Fast forward to now, the Stochastic Gradient algorithm is one of the most popular algorithm in machine learning, widely used in deep learning or for classification and regression. The AWS Machine Learning service for instance is based on the SGD. It looks like we’re still tuning the learning rate after all these years!

Connect with me on Linkedin, follow me on Twitter.