In this talk, I will present my experiences as a scientist/engineer intern at Yahoo. During my internship period, we were working to improve the performance of Yahoo Aviate system which is a smart android based launcher. Aviate is an intelligent system designed to organize your apps and show the information you need, at the moment its useful. During the summer, we were working on couple of aspects to improve the user satisfactory of the system. In this talk, I will present the evaluation methods that we performed, the algorithms that we proposed, and the experiments that we run to improve the performance of Aviate.