[noodlesUK]

I think that's a totally reasonable compromise which would reduce abuse both by employer and employees. However actually determining what a specific job role entails is quite complicated. Take a look at the SOC codes in the US or NOCs in Canada. Even if you figure that out, auditing people to make sure their day-to-day matches their notional job code is pretty hard.

[csunbird]

Well, at least in Germany, the "profession" field is a free text field, there are no codes. The official is only interested in that whatever you are working as closely matches the original profession on your visa, so you can easily argue that your new title of "SRE Engineer" matches the original "Software Engineer", which they will accept as long as you are a working person in the IT Field.