Vortana Say is a Senior Android Engineer at a FinTech company, building financial technology used by hundreds of thousands of users. He holds four Udacity Nanodegrees — Android Developer, Deep Learning, Machine Learning Engineer, and Natural Language Processing — bridging the two worlds this book connects.                        

He wrote the book he wished existed when he started: practical, honest about what's hard, and focused on building engineer intuition over memorizing formulas.