Depends on what you do with the hours you actually work, as well as your previous history. There is a whole meta associated with this, but basically if you establish yourself as the person that people message first to get answers to questions, especially outside of your team, there is a very low chance you are getting fired.
There isn't a set guide to this. The idea is that you want people to view you as a loss in teams ability to get things done if you were ever to leave, but not in the sense of raw hours worked but the knowledge and decision making process.
What we're talking about is a sort if hybrid between a Tech Lead and Architect, but not quite like either. You have less direct responsibility, but people come to you independently with questions and review requests, because you can quickly generate detailed and accurate answers.
