I am currently working on the OLX Android app. I was the first android dev of the team and after a year developing this new app we became featured app on Play Store. This app runs on phones and tablets and it supports landscape mode. We work with Scrum and I have done diverse tasks that go from development to setup the deployment pipeline or document the architecture. As OLX is the number one regarding to classifieds apps in India and Brazil, one of our biggest challenges is to support low-end Android devices (such as, Micromax, Lava, Samsung Duos and Karbonn) and we have to pay special attention to save the battery and data plans of our users and also focus on performance. Some technologies, libs, tools, etc used on this project: Jenkins, Ubuntu, Git, Github, Eclipse, Android Studio, Maven, Gradle, Apptimize, Robotium, AB Tests, Feature Toggles, Appthwack, Scrum, Retrofit, Etsy StaggeredGridView, Picasso, OKHttp, Android Support Library, Gson, Crashlytics, Crittercism, Upsight, Urban Airship, AD-X, Nanigans, AT Internet, Google Analytics, Material Design, Android +2.3.x. https://play.google.com/store/apps/details?id=com.olx.olx