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It's not about being senior. I supervise no one. Have no authority over anyone.
I do write very robust code that, in partnership with another developer, basically runs the companies infrastructure and a good part of the business.*
You need to nurture a reputation. You do a good job and do it right the first time. You don't duck responsibilities if you create a bug (gives your word validity for plausible deniability). You also give them the impression, ever so slightly, that you'd pack and go without a blink of an eye.**
* recent attempts by management to outsource worked out "poorly".
** you have enough of a nest egg and fixed income to get by, forever
Exactly. And even if it comes close, the steps it details (or even screenshots) are out of date. Just last weekend I finished setting up my server at home and I'm now happily self-hosting my websites. Good riddance, AWS!