FiatLux Software
A software studio in Koprivnica, Croatia, building web apps, integrations, and high-performance C++ for businesses and digital agencies across the EU and the US.
FiatLux Software is a software studio based in Koprivnica, Croatia. The name is Latin for "let there be light". We build software that is clear and does exactly what it should.
The studio was founded by Matej Šipek, a software engineer and administrator of mod-playerbots, an international open-source C++ project. The engineer on your first call is the one who designs and writes your software. There are no account managers relaying messages and no juniors learning on your budget, so decisions stay fast and nothing gets lost along the way. We run a limited number of projects at once, so yours gets full attention instead of a slot in a queue.
We build the whole stack: systems-level C++ for code that has to be fast and stable, full-stack web and applications on top, and the databases, APIs, and deployment that hold it together. Because we understand every layer, we can make the right call at each one.
We talk through what you are trying to do and whether we are the right people for it. No charge and no obligation. If it is not a good fit, we say so on that call rather than three weeks into a quote.
You watch progress as it happens instead of waiting for a reveal at the end. Feedback loops are short, and decisions get made with you. Larger projects are delivered and paid in phases, so you are never funding work you have not seen.
You review the finished work on a live staging address before the final payment. Then we ship it, document it, and make sure you or your next developer can run it. The code, design, domain, and content are registered to you. There is nothing to unlock and nobody to keep paying.
Tell us what you need and you get a written quote for the whole job, with the price fixed before work starts. Get in touch.
We work with two kinds of clients: businesses that need software built or connected, and digital agencies that need development under their own brand. That means companies, sole traders, and public institutions in Croatia, across the EU, and in the US. Work is remote first, and clients near Koprivnica can meet in person when that is easier than a call.
We do not take private consumer projects, and we turn down work that we are not the right fit for. That is not a formality. A stack we have no business touching is better off with someone who knows it, and saying so early costs you less than finding out late.
Invoices are issued electronically and paid by bank transfer: half when the quote is accepted, half at launch.
From C++ to CSS, the hard parts stay with us. Nothing gets quietly subcontracted.
Fast software is good. Software that's correct and fast is the point.
Clean, documented code in your own repository from day one. Yours to keep, run, and extend.
We turn down work that isn't right for us, and tell you why. A good referral beats a bad project.
We'd rather earn the next project than win this one at any cost.
No jargon walls. You'll always understand what we're doing and why, in your language, HR or EN.
Let's build something good.
Write to support@fiatlux-software.com
A few sentences is enough to start. Not sure we're the right fit for it?