Software Engineer with 30 years of experience here. I am the new guy in a team working on a critical app in a large company which also aspires to be tech company. The application that I am working on has been touched by many people. Mostly competent people, but you can see how there is a lack of coherence. Cleary a lot of the engineers only new pieces and no one knew the app deeply. Because every body left to new projects I became the domain expert in just a few months. I would like to stay and become the domain expert and work through the application with a continuous improvement mindset. It would be a big challenge and very valuable for the company, but I don't see the incentives aligned for me to do that.