Leo is a Python developer since 2001, pretty much all of it in complex web application development.
Since 2009 he has focused on web applications and data processing for business needs, including ERP development, and data processing and reporting with SQL (directly or through various ORMs, including SQLAlchemy) and Pandas.
He had the honour of being one of the technical reviewers of "Fluent Python" by Luciano Ramalho.