Most of the anxiety about hiring across a border is about paperwork nobody has read. It is worth separating what genuinely changes from what only sounds like it does, because the differences are fewer and more manageable than the worry suggests.
You are contracting with a business, not adding a payroll line
Engineers in the Czech Republic and Slovakia normally work through their own registered business. That is the standard local arrangement, not an improvisation for foreign clients. They invoice, they handle their own taxes and contributions, and they carry the administrative side themselves. Your side looks like any other supplier relationship: a contract, an invoice, a payment.
The cost structure is different, and that is the whole point
A domestic employee carries employer payroll tax, health, dental and vision, the retirement match, equity, office and equipment, and often a recruiter fee. The documented total is a large addition on top of base pay. None of that exists in a direct engagement. So the engineer can be paid like a western engineer rather than a local one, while your total cost still comes out below a domestic hire. Both of those are true at the same time, because the saving is structural rather than taken out of anybody's rate.
Intellectual property is a clause, not a risk
This is the question that stops most deals and it is the easiest one to settle. Assignment of work product, confidentiality, and the handling of pre-existing material are standard contract terms and are enforceable in a normal commercial agreement. What matters is that it is written down before the first commit, not that the engineer is in a particular country. A domestic contractor with a vague contract is a bigger exposure than a foreign one with a clear one.
What you give up
Be honest about this part. You do not get the same day to day control you have over an employee, and you should not try to exercise it, because behaving like an employer while contracting is exactly how these arrangements get challenged. You are buying an outcome and a professional relationship, not attendance. Teams used to managing by presence find this harder than teams used to managing by output.
What you keep
Everything that actually matters for engineering. Code review, architectural standards, your definition of done, sprint participation, your tools, your process. Nothing about a contract engagement prevents an engineer from being a full member of the team. The difference is administrative, and most of it sits on their side of the line.
Where we sit, precisely
We are not an employer of record and we are not in the payment path. The client contracts with and pays the engineer or the engineer's business directly. We invoice separately for sourcing, assessment and introduction, once, so the fee does not grow with the length of the engagement. That means nobody is taking a recurring margin out of the middle of the relationship, which is the entire reason the numbers work for both sides.
If you want the contract questions answered before you meet anyone, start here. See how it works.