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Innovative ideas.

We are experts in the field of mobile and web technology including Artificial Intelligence, Augmented Reality, and Machine Learning.

We are here to improve your business.

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What we do?


The benefits of a blockchain solution (BaaS): transparency, scalability, and immutability! Additional benefits include accelerated processing of transactions and cost savings from cutting out the middleman – the blockchain network becomes the middleman!
Join the blockchain boom and find out how this cutting-edge technology can enhance your business model.


Our experienced team develops mobile applications for iOS, Android and Windows Phone. Your application can be built natively or cross-platform using Xamarin to best suit your project requirements.  We have completed a broad range of projects for clients and offer support and maintenance after the project is completed.


Our web developers specialize in modern responsive design, multiple language support, search engine optimization, and easily manageable content management system (CMS) customization.
We offer support, maintenance, and hosting services, and if you want a visually attractive site, we have got that covered as well with graphic designers on staff.


Nowadays, more and more companies are choosing to move their IT solutions to the Cloud to take advantage of the increased security, continuity and unlimited scalability. We are here to help. As a Microsoft Certified Partner, we have extensive experience with the Microsoft Azure platform.


DLL case study

A mobile application to help drive sales.

7N corporate website

Who does an IT consultancy go to for website development?

Rental Butler portal

Transitioning from WordPress to a full-featured CMS

Intercars Expo app

Last-minute application development.

AutoMapa GPS iOS app

How did we port a complex Windows CE application to iOS?

Legia iOS, Android and WP app

Full-featured, professional mobile application for a big European football team.


How migration to the Cloud can reduce infrastructure costs.

217 Projects

72 Clients

35 Experts

11 Years


7n website

JMMJ has delivered a new 7N website based on Umbraco, provides after deployment support, and advised us on the Azure environment. JMMJ is a reliable partner, delivering products on time and maintaining a high quality. They are very responsive and always propose solutions that best fits our requirements.

I highly recommend working with JMMJ.

Søren Pallesen, Chief Operating Officer at 7N
DLL Mobile

The app is regarded as a game changer, and will be expanded to all business lines due to its success.

JMMJ is an exceptional partner due to their ability to work expeditiously and remain adaptive. Their team is able to fill in the gaps when planning initial scopes, and always delivers on time.

Michal Szmidt, New Business Development Manager, DLL Group
Rental Butler website

Our company hired JMMJ for a complete website redesign. It was a difficult task due to restrictions with our software provider.

JMMJ was extremely professional and the results exceeded our expectations. Their work was outstanding and it was completed ahead of schedule. They have also offered support since the design was complete.

Jamie Tarter, General Manager at Rental Butler
Clipatize website

JMMJ upgraded our corporate website and integrated the site with Umbraco CMS. Based on the success of this project, we recommended JMMJ to several clients to upgrade their websites as well.

Our successful relationship continues with JMMJ providing maintenance and hosting on Azure.

Jakub Lebuda, CEO at CLIPATIZE
Legia app

A dominant football team in the Polish Ekstraklasa league, Legia Warszawa, recommends JMMJ for creating mobile - iOS, Android and Windows Phone applications.

JMMJ developed and deployed mobile applications for Legia and provides maintenance and periodic updates as required.

Legia strongly recommends JMMJ as a partner which offers high quality programming services and delivers on time.

Legia Warszawa

Our Clients

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