JetBrains is not offically russian company (but founded by russian citizens). They have headquaters and are registered in Czech Republic, so company is in european legislation area. They have R&D centers around a world but mostly in Russia. The reason why they are registered in CZ are that they do not trust russian goverment and businness in Russia. I don't think that it's security risk to use JetBrains products, but I expect that delivering new versions and support will be postponed or cancelled for some time.