Mobile Jazz is an expert in Mobile Technology. We specialize in building high quality software ranging from simple mobile apps for iPhone, iPad and Android up to complex systems that depend on a reliable and scalable backend and database infrastructure.


Mobile Technology

  • Mobile Applications for iPhone, iPad & Android
  • Location-aware applications
  • Social Integration (Facebook, Twitter, Google+)
  • Mobile Analytics
  • Mobile Advertisement
  • Proximity Marketing
  • Mobile Coupons
  • QR-Codes
  • Audio & Video Streaming
  • Mobile Websites & Stores (Mobile Online Shop)
  • Mobile Games for Marketing Campaigns and Advertising (Gamevertising)
  • Mobile Security

Backend Services

  • Server-setup and maintenance
  • Database Management
  • IT Security
  • Development of Administration Tools

UI/UX Design

  • User Interface (UI), Interaction (IxD) & User Experience (UX) Design
  • Application-flow Mockups
  • Use-flow design
  • Rapid Prototyping of Interfaces
  • Development of custom-built UI Widgets

About Us

We have a team of experienced professional with a variety of backgrounds, which goes beyond Mobile Technology to also encompass in-depth knowledge of Enterprise Software, scalable Database Systems and IT Security, as well as UI/UX Design and Psychology. We are result-driven and have strong understanding of quality and design. We do not just create software, we create experiences. And we deliver what we promise.


Stefan Klumpp


Stefan is responsible for the business development at Mobile Jazz and has also a proven track record of excellent engineering work. He has a background in Electrical Engineering and Psychology, and was working on the Driverless Car project at Stanford University (now a Google project). Before getting into Mobile Technology, Stefan was working on Embedded Systems at Volkswagen and Audi. He was among the first people developing applications for iPhone and Android and was in lead positions at various startups before co-founding Mobile Jazz.

Jordi Giménez


Jordi is the CTO at Mobile Jazz and has the overall responsibility for the technology used in our products and projects. He has top-notch knowledge in various technologies and outstanding management skills, due to his many years of experience in consulting at Deloitte. Jordi is specialized on building high-availability backend systems and databases that scale to serve millions of users to the satisfaction of our clients. He's also a recognized expert on IT Security and an active member on several security committees.


Mateusz Armatys


Hannes Widmoser


Krzysztof Kucharewicz


Xavi Gil


Fernando García


Adrian Demetrescu


Javier Chávarri


Aleix Ventayol


Joan Martin


Saül Baró


José González Gómez


Francisco Gonzalez Rull


Pablo García Roca


What our clients think

We worked with Stefan, Jordi and their team at Mobile Jazz on a 4 month engagement to build an iOS application. They are an extraordinary team - talented, organized, timely and personable. I would definitely hire them again and recommend them highly. Whether you work at a tech startup or major company, they have the skills to deliver an incredible product.

Rick Vidal | CEO of Dtime Inc.

At payworks, we have very high quality and security standards and it was important for us to find someone we could trust to deliver exceptional results. Not only did Mobile Jazz prove to have in-depth technical knowledge, but also they were able to constantly adapt to our fast paced startup environment. Mobile Jazz made it very transparent to see what they're working on and they guided us in the technical decision making process, which lead to great results and a high quality outcome.

David Bellem | Managing Director at payworks GmbH

I have been working with Mobile Jazz over the last year. It has been a very fulfilling relationship as I have never worked with a partner company like this before – the work is of outstanding quality, they tackle the issues thoroughly with leading edge concepts and delivered any given project on time.

Stefan and Jordi are very pleasant people to work with. They are knowledgeable, provide most helpful advice and not only regarding technology but they have also the business and business processes in mind and their impact on the technology.

I recommend Mobile Jazz and its employees without any hesitation and can only say it again that betting on these guys is probably the safest money you can make.

Dr. Alexander Marten | CEO of Augmentation Industries GmbH

"Mobile Jazz crafted a great iOS MVP for us. Fast, flexible, and surgically precise. Highly recommended."

Davide Berretta | Co-Founder of fleisure

Work With Us

If you're interested in hiring our team for consulting work, a complete product development or simply extending your existing team, please get in touch with us via e-mail or call us directly.

Contact Us
+34 644 350 850


We are a distributed team of highly skilled engineers, designers and marketing experts with headquarters in Barcelona and satellite offices in the United States, Dubai, Germany, Austria and Poland.

We are hiring!

We believe that Mobile is the next big thing and are working on a range of products and services to disrupt existing industries with fresh concepts and upcoming mobile technologies.

We have a beautiful 9th floor office in the center of Barcelona, equipped with a kitchen and a (mostly) sunny terrace as well as a Playstation and Wii for the mental breaks. We provide free lunch to all our employees.

Open Positions

If you've any questions regarding working with Mobile Jazz please contact us at

Jobs API

Software Engineers, please apply here:


with Content-Type set to "application/json", and a JSON document as body with the following keys:

  • name: Your real name as a String
  • email: Your e-mail address where we can contact you as a String
  • about: Why you think you’re the right person to get the job done, String
  • urls: Array of Strings, with URLs describing yourself. You can include as many as you want, like your LinkedIn profile, GitHub, BitBucket, MasterBranch, etc.