Who to hire to package Python code as MSI installer?

I already built an MVP I built the MSI installer to package my python code together with my freelance developer. However, the installer is kinda buggy and it doesn't seem a good use of time if we have to learn how to build a proper installer ourselves. If I post a job on UpWork however, I am not sure who to even look for to build an MSI installer. Who would be the right person to hire to do that? Is this just a software developer? Or can I use certain keywords to look for the right person?

How do you solve this process for your products?