They say they had three R&D offices (out of 6) in Russia and closed them in March 2022.[1] 131 out of 161 open positions on their career page list Prague as one of the possible locations.[2]

[1]: Slide 35: https://resources.jetbrains.com/storage/products/jetbrains/d...

[2]: https://www.jetbrains.com/careers/jobs/