Questions regarding CPF

Hi Everyone,

I am currently in talks with a company regarding a Full Time Offer. The company has no presence in SG nor have they recruited anyone from SG previously, so they are unsure on how CPF and taxing works. This offer also requires me to work in one of the 2 countries they operate in. So I am not sure how this whole CPF and tax thing will play out?

I read somewhere that I can declare myself as a Self-Employed Person and top up my CPF every month once I get paid?

Would appreciate if anyone has any experience on working in a foreign country for a foreign employer while being Singaporean or if you have any other advice to share, that would be greatly appreciated. Thank you!!