Our team helped Lumosity to create a great android experience that landed its application on the “Google Play Store – Best Apps of 2014” list. The aim of this project was to create a library for sending different data to different endpoints without losing packages and to improve the persistence layer, resulting in better overall architecture and responsiveness of the application. By closely working with the data engineering team, and leading the initiative to introduce dependency injection, we brought the testability of the application to the next level.