Nice one thank you will have a nose.It's been 5 years since we were last there, however I remember there was a row of nice restaurants overlooking the river Spree. We ate at dusk and it was great looking out at the river when it's all lit up.
A quick Google maps and I've found these:
https://www.balthazar-restaurant.de/
http://zillestube-nikolaiviertel.de/
https://ephraims.de/