Logic and logical thinking - this is the fundamental quality. Thinking, analyzing, contemplating and wondering. Attention to detail everywhere - be it code or

Logic and logical thinking - this is the fundamental quality. Thinking, analyzing, contemplating and wondering. Attention to detail everywhere - be it code or design or documentation. Communication skills - if one cannot communicate ideas, break them down and simplify them to oneself and others, the work will not really deliver a lot of value over time. Curiosity to learn more and delve deeper to understand how things work (at a lower level). Be lazy and optimize - optimize things, avoid repetitive work by building tools and tools that use tools. "Limited resource" thinking - you may have 16GB RAM, a 4TB drive and a 100Mbps Internet connection, but your users may not. As much as possible, try to minimize things - the size of your program, the amount of data you store, the amount of data you transfer over the network, etc. It might sound silly, but this never goes out of fashion. It just comes back around once every few decades as we invent new devices and ecosystems with different constraints.