Building big scale data product doesn't rely only on sophisticated modeling. It also requires an agile methodology, iterative research & development process, versatile big data stack, and a value-oriented mindset. I'll discuss how we -at Dsquares- build big-scale AI product that leverages clients' data from different industries to deliver business-critical value to the end customer. I'll cover the process of product discovery, R&D tasks for unsolved problems, and mapping business requirements into big data technical requirements.