Very condensed experiences from Etsy’s CTO:<p>1: Nothing we “know” about software development should be assumed to be true.<p>2: Technology is the product of the culture that builds it.<p>3: Software development should be thought of as a cycle of continual learning and improvement rather a progression from start to finish, or a search for correctness.<p>4: You build a culture of learning by optimizing globally not locally.<p>5: If you want to build for the long term, the only guarantee is change.