Ask HN: How do you manage payroll and compliance for foreign remote employees?

I run a very small marketing science consultancy (www.gradientmetrics.com) and we are fully remote. We are hiring our fourth employee (yay!) and this person is in the Netherlands. I am in NYC and I have one employee (W-2) in the US and a FTE in Warsaw. For the employee in Poland, we can just use Transferwise and the only legal thing we had to do was for him to set up a company to invoice and accept payments. In the Netherlands things are more complicated and it looks like we’ll have to use some kind of payroll provider. I know many companies represented here are fully remote so we cannot be the only ones wrestling with these logistical issues. I was hoping there’d be like a “Justworks for international companies” that I could plug into, but c’est la vie. Are there any platforms or systems that I should know about? Any tips or words for the wise would be hugely appreciated.