Although I think it's best to find companies directly instead of going via recruiters, I found my most recent gig via https://www.a.team/

OP here. What's the equivalent for data science / ML / stats type jobs? I'm not a pure software engineer. Any code I've even written in my job has been for experiments, not for end products.

I think generally data science/ML/stats will pay much lower than SWE outside of finance, fyi

Not necessarily. I definitely make more than most (non-US) software engineers as a DS, but agree that finance pays a lot more than other areas.

yes but if they are smaller, often you wont have heard of them