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Your E-commerce Agency

We deliver solutions tailored to your business scale – from rapid deployments to advanced systems for market leaders.

Who we are?

Media4U started as a small group of enthusiasts back in 2000 (just three years after the first e-shop launched in Poland) who believed that online sales were more than just a passing trend. We began as a two-person startup. Today, we are a team of over 100 experts providing high-performance e-commerce solutions for businesses at every stage of growth.

Our strength lies in our technological versatility. We develop our proprietary Cartalo ecosystem – ranging from the ready-to-use Cartalo BOX for companies seeking stable growth, to tailor-made Enterprise-class systems. As a certified Shopware partner, we implement advanced platforms for market leaders, while for brands just expanding into e-commerce, we deliver projects based on WooCommerce.

We complement our technology with strategic support: from UX and analytics to effective online marketing campaigns (Google Ads, Meta Ads). We also developed FactsMatter by PowerBI, a proprietary tool that enables our clients to perform instant, precise sales data analysis. Our team, comprising developers, testers, PMs, and e-marketing specialists, works every day to ensure that shopping at your store is a perfectly designed experience.

Why do we exist?

When I founded Media4U, I felt an incredible excitement – I knew we were on the threshold of a digital revolution. From day one, we were driven by a desire to blaze new trails and the courage to create solutions that others couldn’t yet imagine. Today, I look at our team with pride: a group of enthusiasts who aren’t afraid to go against the grain to deliver technology that gives our clients a real edge. We have built something unique, and we are developing it dynamically.

Maciej Kasperek

CEO of Media4U

Meet the Media4U Board & Management

Maciej Kasperek

CEO

I am creating a space where one of the best e-commerce teams in Poland can thrive. Together, we define market standards by working with industry leaders.

Ewelina Kałdunek – Ciołecka

Head of Sales & Customer Success

Talking to clients, building relationships, and delivering real results fuel me with positive energy.

Piotr Andrzejewski

Head of IT

I believe the best ideas are born when we listen to others. In my work, I follow the principle that new goals require new paths – we won’t achieve a breakthrough by simply repeating the same patterns.

Aleksandra Bachlińska

Head of Customer Service

To me, customer support is more than just resolving tickets – it’s about building a relationship based on trust and the certainty that we are on the same side in every situation.

Magdalena Czapska

Head of People & Culture

I believe that people are behind every technological success, which is why I build a team that enthusiastically brings even our clients’ boldest visions to life.

Maciej Strzelczyk

Deputy Head of IT

I bridge business needs with technology, leading strategic product initiatives and maintaining technical standards. I drive the growth of our specialists and the organization, enabling the fast and effective delivery of valuable solutions.

Marta Ostrowska

Marketing Manager

I enjoy talking about technology through the lens of its benefits and finding unconventional ways to reach clients.

Anna Łuczyńska

Customer Service Team Manager

I ensure that the client feels in control and secure at every stage of our cooperation. Clear communication, an efficient team, and quick operational decisions translate into their business peace of mind.

Tomasz Jakubiak

Customer Service Team Manager

I believe that composure and professional calm are the keys to solving any challenge—I make sure our clients always feel their business is in safe hands.

Maciej Wierzbicki

Systems & Networks Department Manager

I design and develop stable hosting environments based on cloud and dedicated solutions. I believe technology should, above all, be secure and stable for the client, yet simple to use.

Tomasz Zarychta

Web Analytics Team Manager

I look for answers in the numbers. I provide precise analytics that allow our clients to make right decisions based on facts, not intuition.

We Create Secure
e-Shops That Perform and Grow

We have helped numerous brands in the fashion industry, but our software is designed to power businesses across all sectors. We don’t just listen to your vision; we transform it into a stable sales tool.

We offer end-to-end services: from designing aesthetic and functional websites, online stores, and B2B platforms, to programming high-performance systems and driving traffic through effective online marketing. With post-implementation analytics and optimisation, we stay aligned with your needs. We ensure the customer journey in your store is a masterfully designed experience – seamless, attractive, and reliable on every device.

+25

Years on the Polish and international markets

+100

E-commerce experts on board

+200

Successful e-commerce implementations

+15

Years of developing and optimizing our proprietary Cartalo platform

Discover our
reliable process

Collaboration begins with a pre-implementation analysis that maps out the shape of the entire service and leads to a specification, work plan, and proposal. During the analysis we take into account your needs, expectations, goals and business processes. We confront the gathered information with the knowledge of our IT and UX specialists. We provide comprehensive pre-implementation analysis to shorten implementation time and minimize the risk of errors. We also ensure that the e-store we create is useful for users.

We ensure a frontend layer that’s easy to navigate, provides quick access to your products, and delivers a compelling shopping experience. Frontend programming allows your site to be viewed on all devices, enabling useful site interactions and an effective purchase path.

The backend base of your store is our own sales platform or another solution we’ll recommend during a free consultation for your business. We program the core of the system and develop it with the specific features you need to work efficiently and streamline your business’ processes. A well-designed e-store is a powerful backend software system that ensures timely and efficient order processing and optimal CMS operation.

We integrate your store with the systems identified in the pre-implementation analysis: ERP, payments, logistics, marketing or analytics tools. We can connect your store to any third-party systems you need to automate your sales process and accelerate the growth of your business.

We transfer data while ensuring sales continuity. We specialize in migrating entire websites and online stores, migrating data to new software, transferring data to cloud solutions and hybrid environments, creating backup systems, and archiving data. Store assortment, order history, user data, marketing content, as well as discount codes and loyalty program points – we prepare systems for migration based on key data. The entire process is monitored in real time to keep your data safe.

Your e-store goes through a whole series of functional tests (automated and manual). Any discrepancies are continuously corrected by our teams. Through integration, performance, and usability testing, we make sure the features work smoothly and your site is secure and scalable to ensure application reliability.

Awards and Recognition

For years, we have been setting industry standards. Together with our clients, we regularly receive prestigious awards from both Polish and international expert panels.

Digital Quality Mark

3rd place in the competition for the best e-commerce agency in Poland

E-commerce Polska Awards 2022

Award in the “Best on mobile” category for the UrbanCity online store

European E-commerce Awards 2022

Award in the category “European Sports, Leisure, Toys Ecommerce Website of the Year” for the implementation for the R-GOL brand

E-commerce Polska Awards 2025

Award in the category Best adaptation to new digital reality B2C for the implementation of an online store for the Kolor Plus Studio brand

+48 726 490 815

office@media4u.pl