Initially the customer provided us with a SRS with a list of required technologies and development tools.
Vadim Popov (CEO Upstarts) leaded the project personally being its manager (conversations with the customer, timings control, tasks management) and teamlead (technical consulting of the team members, architectural solutions, etc). Also he developed 100% of the backend API with PHP (Phalcon), MySQL and 100% of the UI interface of the app (except for the games themselves) - Unity 3D, C#.