I was in the same position when I started working at the first company.
They just continued to pay the same salary after I graduated.
Until you reach senior level, the best strategy for maximising salary is to switch to better paying jobs every ~2 years.
Also, I assume you are from Latvia as you have LV in your username - 1k is waaay to low. I have friends making 3.5k eur a month. You can find mid level positions that pay more than 2k/m
There is also something to be said about working for different companies and experiencing different approaches to development, different tools, tech stacks and all of the other stuff you might not see if you stick at one place for a long time.
Though that's more of an auxiliary reason for switching jobs, whereas OP was talking about finances in particular.
They just continued to pay the same salary after I graduated.
Until you reach senior level, the best strategy for maximising salary is to switch to better paying jobs every ~2 years.
Also, I assume you are from Latvia as you have LV in your username - 1k is waaay to low. I have friends making 3.5k eur a month. You can find mid level positions that pay more than 2k/m