SRE teams are constructed so that our engineers divide their time between two equally important types of work. SREs staff on-call shifts, which entail putting our hands around the systems, observing where and how these systems break, and understanding challenges such as how to best scale them. But we also have time to then reflect and decide what to build in order to make those systems easier to manage. In essence, we have the pleasure of playing both the roles of the pilot and the engineer/designer.