I joined a startup startup at an early stage and have been working with them for one year and half. My position could be named something like "devops" or "fullstack engineer".
We met some success and the startup have been hiring people for the past year. I previously had lots of satisfaction to be part in many discussions where I was asked to find and engineer technical solutions to our problems and our needs.
But as more people joined, my technical supervisor discuss with the relevant people in the company about problems and needs, and after a thinking process I'm not part of, he just hands out the technical solution he wants me to implement.
My supervisor is competent and he means well, but my role didn't evolve, in fact it became smaller. Less responsability, less thinking, more execution. I feel like I'm not learning anything anymore and I'm concerned about my evolution in the company. I don't see my responsabilities or salary going to evolve if my role and impact diminish like this. My motivation is also going down as I don't feel beeing part of the "core team" anymore.
As far as I know, my superiors are happy with my work. I had a raise one year ago, but we haven't had a "performance review" ever since.
I thought about talking to my boss about my concerns, but I'm afraid it makes me come out as entitled (I might be?). My boss don't "owe" me to give me more responsabilities but as an engineer, I thought my job should be about finding solutions, not just implementing them.
How do I approach the problem with my boss ?