How is Instagram for Android built?

Instagram is a lovely app. It has a fast and beautiful interface which is a fitting backdrop or canvas for the service it offers, which is the ability for users to share equally stunning photos and videos. I am not much of a photo and video person so this aspect of Instagram doesn’t resonate with me so much. But what impresses me as a developer is how well-built it is. The interface is buttery smooth even on old memory-challenged devices in an age where we struggle with bulky apps like Facebook. I always wonder, “what kind of techniques and tools …