Sofia

Not an enormous city, but I would recommend being in one of these two areas where you will be close to the best items the city has to offer.

I arrived in early March and the first two weeks were an awful mix of snow, rain and clouds. Vitosha Mountain which usually over the city was barely visible until half way through the month. From late March onwards the temperatures steadily rose leaving only faint scatters of snow on the mountains peak.

Unless you are explicitly looking for snow, it's difficult to make a compelling argument for visiting prior to April, where the city feels like it comes to life and the outdoor amenities can be fully enjoyed.

There's enough in Sofia to comfortably stay for a month.

There is a sizeable international community in Sofia, particularly after the Russian invasion of Ukraine where those who have been displaced ave relocated to the city. It has also become a home to numerous Russian's who have relocated there in the previous decade leading up the recent events. There is a sizeable expat community with many European companies having chosen to set up base in the city.

There is a small remote work community in the city, but you are more likely to find people in Bankso, a two hour drive from Sofia which has become a hub for remote workers.