As already mentioned, there is a large Russian presence in the DR, more specifically, in Punta Cana. I don't know if you want to work in the hotel or tour industry, but there is a demand for Russian speakers on the East Coast.
There could also be a demand for people to learn Russian, as well, for tourism in the future. In any case, a Russian language school in Cortecito closed its doors. Although I don't know why, the assumption is lack of business.
UNIBE University has a branch in Cap Cana. Maybe they are giving classes or you can present to them the idea.
You're gonna have to be lucky or creative, or both.