Nicolas Koumchatzky is the Lead for Twitter Cortex. Cortex is in charge of building Twitter's AI platform and latest deep learning models. He started as a Quant in Paris, then joined Madbits, a startup specialized on using deep learning for content understanding. When Madbits was acquired by Twitter in 2014, he joined as a deep learning expert and led a few projects in Cortex, include a real-time live video classification product for Periscope. In 2016, he focused on building an scalable AI platform for the company. Early 2017, he became the lead for the team.