> Become an expert in something hard. Fix bugs nobody else can.
This is risky advice. :) Context matters. It's going to sound very appealing to a self-motivated, mobile IC, and could work very well in orgs that value individual effort. But in many orgs, solo experts playing non-fungible roles are very big red flags, and can draw negative management attention. Maybe I could build a team around you... but I might not have the resources, or the problem might not warrant it. So I just might end up making your work life harder -- mitigating the risk by devaluing the service you're working on, just moving it to SaaS, or maybe keeping it but making you train up all your colleagues on the risk area (turning you into an unhappy tutor), etc.
It might be better to phrase it as an architectural expert. Being in a position where you understand how everything works together better than anyone else is valuable. You can't necessarily train any other person to have such diverse knowledge, nor outsource it. This might lead to you being able to solve otherwise unfixable bugs, but that's more of a side effect.
Maybe. I get that being the best source of information might be a job-security feature. But it doesn't necessarily translate into growth opportunities. From a manager's POV, I might view you as a hoarder of information, a silo builder, a poor communicator, or poor team player. You might get job security out of this, because your knowledge will cement you in place. Why would we promote the linchpin out of the system they are holding together? Or it might just draw scrutiny to the larger business risks of your system, as I mentioned earlier.
If you could leverage your knowledge in a business-strategic way -- e.g., empower a team to work better by clarifying, simplifying, and standardizing the architecture -- you might draw attention as a future leader. (If you have a selfish boss who will steal credit, a little more political work might be needed alongside this.)
This is risky advice. :) Context matters. It's going to sound very appealing to a self-motivated, mobile IC, and could work very well in orgs that value individual effort. But in many orgs, solo experts playing non-fungible roles are very big red flags, and can draw negative management attention. Maybe I could build a team around you... but I might not have the resources, or the problem might not warrant it. So I just might end up making your work life harder -- mitigating the risk by devaluing the service you're working on, just moving it to SaaS, or maybe keeping it but making you train up all your colleagues on the risk area (turning you into an unhappy tutor), etc.