First of all a little background:
Fresh employed (<2 months) for a new - permanent - position
~5 years experience in IT-Sector
Service Company in Pharmasector
My responsibilities go far beyond the job description. I was hired as IT-project staff but this is only a fraction of my role here.
Actually, I'm the only person with IT-Knowledge in a company whose service relies on quite (way too) complex IT-Processes. These processes, the architecture, Service Providers and so on, have to be refactored and managed.
The job is actually a quite big thing and not as banal as I thought in the first place. The management is aware of that, but due their lack of IT-knowledge (they say) they where unable to write a proper job description. I now write my own description which will be part of the working contract.
Within the next 6-12 months, I'll be almost irreplaceable. Everything I do should have been done years ago (literally). The IT structure reminds me of a tower of razorblades. God knows why this still stands up, but it doesn't take a lot for everything to fail at once.
I'm perfectly fine with the job, it's an awesome challenge within a good friendly and high budget environment.
My direct superior (Not part of the management) told me, that there where only 2 other candidates which where suitable and that they chose me for the social fit (I fit perfectly in the team).
I've sold myself far below value. Looking at national salary statistics, companies financial situation and my (now gathered) knowledge of that position, there is a discrepancy of factor 2-3. I think that's huge and I feel "way too cheap".
I do not want to ask for the double or triple. Let's say within the next 3 years, I want my salary to be doubled from the current. By that, it would be slightly below the median for such a position for a person of my experience (8 years then).
How and when is such a topic addressed best?