In English I can say "See you soon" or "See you later".

"See you soon" is a little more familiar. I might use it for someone with whom I have a personal relationship with. "See you later" is a little less personal - suitable for an acquaintance.

In Russian we have Пока for "See you soon".

is there an equivalent for "See you later"? E.g. Попозже?

Спасибо