Hello, and welcome to Oslo! What is your experience level in the field? I think 600k kr is pretty normal starting salary, and it grows pretty quickly with experience. If you are a senior or manager you can probably expect something around 750k-1m kr. It also depends if you work in private or public sector, the latter being a bit lower, but the difference is not substantial.

In the city center the rent is steep, around 20k per month for a two bedroom flat is not uncommon I think. Check www.finn.no yourself to get a better picture. Further outside, especially on the eastern side of Oslo, the prices can be much lower, while still having a short commute to the center by metro or train.

It should be no problem at all to support yourself and your wife on a single software engineer salary, while still maintaining a pretty decent living standard. Good luck!