Built on Medusa.js. Full control, zero SaaS platform limitations.
AI integrations that save time and increase profits.
Not every technology makes sense. I only build systems that actually work. Modern websites, online stores and AI tools that help businesses sell and grow.
Your business. Your rules. Your system.
Fast, optimized, and built for conversion.
Exactly what your business needs.
I design and build commerce systems that handle real payments, orders, sellers and integrations.
Architecture, backend, seller panel and storefront. Independent makers run their own shops here, and a buyer pays once for a cart filled from several of them.
The buyer pays once and the order splits into the shops that fulfil it.
Rates and payout holds are settings, not code. Every payment is attributed to the right seller.
Sellers already on Shopify, WooCommerce, PrestaShop, Shoper or BaseLinker keep them. Stock and orders match in both places.
DAC7, DSA and the Omnibus Directive run as separate modules that can be updated as the law changes.
An integration stops responding? The operation can be safely retried. The same webhook arrives twice? It does not cause a second effect. A process breaks off halfway? The state can be reconciled and restored. Critical operations leave a trail that shows what actually happened.
Mercur, a marketplace platform built for the Medusa.js ecosystem, wrote up Artovnia as one of its case studies, alongside projects like Skylum.
Read the case study“I genuinely couldn't imagine a better person to design my landing page. What I found the most helpful was not just that Arkadiusz could develop the whole website, but he also has an astounding knowledge of B2B marketing. He knows the kind of solutions that actually reach customers. He proposes different approaches and is very transparent on which solution might be better even if it's cheaper. On the other hand, he presents great reasoning why sometimes the time and cost-consuming approach might be better if long-term it buys me peace of mind, and most importantly, more customers. I can already see the results - my landing page is doing great and I'm planning on cooperating with AppCrates more in the future, aiming at new target groups and maybe even building my main page infrastructure from the ground up. Oh, and on top of that I loved how responsive Arkadiusz is! I usually receive his answers in a couple of hours (or faster) and he's the most professional expert I communicated with in a long time. This is a lengthy review as you can see but it's just that I genuinely think he's that great to work with and he brings actual results. Couldn't recommend him more!!”
“I've been working with Arkadiusz for some time and have had a great experience. He's reliable, easy to communicate with, and genuinely cares about the quality of his work. He understands what the business needs, suggests thoughtful solutions, and takes real ownership of the project. I'm very happy with our cooperation and would gladly recommend him.”
“I highly recommend it. My portfolio is exactly what I envisioned, including moving elements, animations, an English translation and the ability to add my own materials. Thanks!”
No account manager and no hand-offs. The person who talks to you about your business model also designs the architecture, writes the backend and the storefront, and answers when something needs to change.
We start with how you sell: who pays, who ships, who gets paid and when. The technology follows from those answers. You get the code, access to everything, and a panel where you edit content yourself.
My specialisation is Medusa.js: online stores, multi-vendor marketplaces and commerce integrations written around your business model. How a Medusa.js project works
Fresh notes on Medusa.js, e-commerce, AI and the decisions behind modern digital products.
Share & Save drops a seller's commission from 18% to 13% when that seller brought the customer in. Here is how signed click attribution, per-seller commission adjustments, double-charge protection, and a full audit trail work in a Medusa.js v2 marketplace.
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Rebuilding 3DPCC from a cost calculator into a production management system took a seven hour planned outage. Five of those hours went to data migration scripts and verifying their results, not to shipping code. Here is the plan, the window, and what I took from it.
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How to translate GPSR, DSA, GDPR, BDO, and DAC7 obligations into a reasonable MVP, without designing infrastructure for millions of listings. A practical architectural overview for marketplace builders.
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