½ûÂþÌìÌÃ

The general rule is that if one leaves Germany for over a year then the Niedelassungserlaubnis is considered abandoned. One can apply for an extension for up to a couple of years if one is going to work in another Schengen or EU country with the clear intent to return and have gainful employment  lined up.

Even less thatn 12 months can be a problem if one deregisters their residence with the intent not to return. If you really want to return, then best to keep an apartment and sublet it rather than give it up and have no German address.

No, my plan is to keep my main place of residence as Germany, where my family (kids/wife) would live an son goes to Kita. But still, I haven't found anyone with such an approach so I was a bit skeptical of the move.

No, my plan is to keep my main place of residence as Germany, where my family (kids/wife) would live an son goes to Kita. But still, I haven't found anyone with such an approach so I was a bit skeptical of the move. - @ABA-Tech

If only for a limited time it should not be a problem. If it is for over a year, then it comes in question. Usually one would only pay tax in the country where they are working as that is usually their legal residence. But if maintaining a residence in Germany, then both countries might expect you to pay income tax there. To get out of paying tax in one might lead to problems with residency in the other. Germany might eventually say that your residency permit is abandoned. If going for over 12 months, you have the option to ask for permission from your local German officials at the office for foreign residents (Auslanderienwohneramt) since your plan is to work in another EU country. Having your family remain in Germany would support your intention to eventually return. But it might mean you are given a time limit. But one cannot maintain the situation indefinitely anyway. Waiting until one has problems and only then asking is likely a mistake; might mean a refusal which would have been avoided if asked in time.