In the past, Warsaw was called the Paris of the East because of beautiful architecture & culture. Right now, is one of the most modern and green capitol of Europe.
So, Warsaw is a good place for living, working and spending your free time.
In this city, you can find a lot of must-see points after work time.
Check here: https://warsawtour.pl/en/about-warsaw/
During the weekend or holiday, you can also travel and tour Poland: https://www.poland.travel/en