Websites and shopsthat bring incustomers.
I'm Mateusz Kornaś. For 18 years I've built websites, shops and apps — first for banks and pharma companies, now for businesses like yours. You talk to me, and I design it, build it and keep it running. No middlemen, no jargon.
First call is free · I usually reply the same day · prices from 3 500 PLN net
Eighteen years is the short version.
Banking, pharma, lottery, high-traffic retail — industries where breaking isn't an option. That's where I learned to build for uptime, audits and scale, not just for the demo.
- Global banking
- Big pharma
- US lottery
- London e-commerce
- Crypto startups
- Hospitality
Built for clients.
Restaurant · Customer site
Their first commission-free sales channel. Every order placed on the site stays 100% with the restaurant — and so does the customer.
Jeweller · E-commerce
An online brand that finally looks like 145 years of craft — with a shop where every piece is one of a kind.
Construction · Corporate site
A showcase worthy of 15 years in the market — a site that builds credibility with private, corporate and public investors on its own.
A complete digital presence.
Instead of a web studio, an app shop, a sysadmin and an AI consultant — one person and one conversation.
Six sides3×3×3, plain CSS, no library
Short, concrete, no agency theatre.
Call
30 minutes, free. We leave with a rough quote, a timeline and whether it makes sense at all.
Brief & quote
Short document, final price, schedule. No theatre, one iteration.
Build
Weekly visible progress on staging. Full transparency — you see what's being built.
Launch & care
Go-live, monitoring, two months of free fixes. Ongoing maintenance on retainer.
Public prices, before you write.
Starting prices, net. You get an exact quote after a free 30-minute call — one number, no surcharges along the way.
I build for myself, too.
My own products, run by me in production. So I know what server bills, support and two-year-old code actually feel like — and I design for that.
Gastronaut
Own productOnline ordering, reservations, a floor plan and a staff console on the restaurant's own domain. A flat fee instead of commission.
Wishy
Own productMake a list, send a link, and people reserve gifts so nobody buys the same thing twice.
mk-kit
Own product165+ standalone, signal-based components: data tables, SVG charts, forms, kanban, an app shell. CSS-variable theming, WCAG 2.1 AA, MIT licence.
Before you write.
How much does a website cost?
A sales landing page starts at 3 500 PLN net, a multi-page company site or shop at 9 900 PLN net. Apps are quoted by scope. You get the exact figure after a free 30-minute call — one number, no surcharges along the way.
How long does it take?
A landing page usually takes 2–3 weeks, a company site or shop 4–6 weeks, an app 8–16 weeks. You see progress on a test version every week, so nothing surprises you at the end.
Will I be able to edit the content myself?
Yes, if you need to. I then build the site on a CMS where you change text, photos and blog posts yourself. If you'd rather not deal with it, I build a lighter site with no admin panel and make the changes for you.
What happens after launch?
Fixes are included for the first two months (a 60- or 90-day warranty, depending on the package). After that you can stay on a flat-fee care plan: updates, backups, monitoring and small changes.
Do you work with businesses outside your city?
Yes. I work remotely with businesses across Poland and abroad, in Polish and English. We talk online or by phone, and you follow progress in your browser.
Project on your desk?
Two sentences about what you need is enough. I usually reply the same day.