I am Daniel Miara – founder of MiarkiTech, OpenCart consultant, and payment integration architect. I began as a 3D designer, but clients quickly needed functional ecommerce solutions, so I built a studio that combines creativity with reliable engineering.
Career snapshot
2001: I launched MiarkiTech, producing LightWave 3D assets. Hardware limitations pushed me toward web development, yet the brand stayed to remind me of our roots.
2004 onwards: I released the GaduGadu module followed by a series of VirtueMart and Joomla extensions, including the first payment integration that evolved from Płatności.pl into PayU.
2003–2005: I taught myself HTML and CSS, designing dozens of websites and templates for agencies that needed a dependable freelancer.
2005–2007: Discovering Mambo/Joomla opened the door to PHP and MySQL. I started auditing extensions, fixing security issues, and building new modules tailored to Polish and UK merchants.
2010 to present: Actively developing and supporting the OpenCart platform. I have created my own platforms such as JustPayFor, CraftForSale and Koszyki24, as well as many mobile applications.
2010: I fell in love with OpenCart, authored hundreds of payment and logistics modules (PayU, Worldpay, First Data, Bambora, Barclaycard, Global Payments, Tpay), and have since launched or rescued stores for brands in Poland, the UK, and beyond.
Need an experienced OpenCart administrator or developer?
I support stores that require clean upgrades, bespoke extensions, CRO tweaks, and payment compliance reviews. I do not take on Journal theme rebuilds, but all other OpenCart flavours are welcome.
Availability is limited, so I cannot accept every project. Send me the brief and timeline and I will confirm whether I can deliver it personally or via my team.
I run OpenCart store administration, development, and incident response services.
2019: JustPayFor.com – a virtual terminal that allows you to generate payment links in seconds and choose any payment gateway.
2022: Craft For Sale - I started building (craftforsale.uk) – a marketplace for craftsmen and designers, with plans for international expansion.
2025: JustPayFor.com - I refreshed the look and functionality.
I created a sister project JustPayFor under the domain Koszyki24.pl dedicated exclusively to clients from Poland.
JustPayFor.com and Koszyki24.pl are free platforms - I encourage you to register an account.
If you haven't had time to read everything or want to quickly see what I do - below you will find my main areas of specialization:
We proudly partner with leading brands
DEFINITELY RECOMMEND! Incredibly fast in action! In a very short time, Daniel fixed the errors in my store, advised on many issues, and performed a number of actions that were messed up by the previous BIG company. Full professionalism, courtesy, and patience with the client. I will turn to him for help without hesitation because I know I will get it!
I recommend Daniel's company to everyone. My store platform was efficiently updated to the latest OC version with many useful add-ons. Thanks also for the updates and fantastic technical support. Whenever there is any problem with OC, I know I can count on professional and quick reaction from Daniel. I recommend!
I recommend MiarkiTech for professionalism, individual approach to the client, and expert help. Daniel not only analyzed our store for errors but also proposed long-term solutions. He informed us what we can do better and what to pay attention to. The speed of action is really impressive compared to other companies I have dealt with.
I wholeheartedly recommend Daniel! We modernized the store together and fixed errors from the previous "company". Excellent contact, all arrangements consulted on an ongoing basis. In two days, we managed to do more than in a month with the previous company!
Great service, lightning-fast responses, a product that 100% meets expectations, which is a plugin for Opencart3 that supports Inpost shipping with an interactive map! I recommend.
At MiarkiTech we believe in developing apps that will speed up your productivity and prepare you for day to day needs. We’re always looking for real user feedback to make the apps feel intuitive and seamlessly integrated into your tasks
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