Who are we?

Geronimo Mobile Agency

Geronimo is a mobile agency based in Paris, that provides strategic, design and development services. We are product specialists who build awesome apps for mobile platforms. From social networking to m-commerce, we have the ability and experience to help your brand grow in the mobile space. Whether you are a large corporation needing help with an enterprise app development, an innovative startup with an idea to disrupt a market, or a demanding brand wanting to update your consumer application, we’re ready to help.

UX / UI Design 100%
Mobile App Development 100%
Digital Marketing Strategy 100%


Whether you need specific on-demand expertise or an extensive long-term support, no matter if your project is still just an idea or is already marketed, our deep experience of every aspect of the app lifecycle makes us the best partner you are looking for.



With several award-winning apps available on iOS and Android, for smartphone, tablets just as well as watch and tv,  we’ve proved our perfect mastery of best-in-class native development.



Always up-to-date with the latest trends and technological progress, we are able to recommend the best existing solutions for every challenge you face: internet of things,  geofencing, deeplinking, mobile payment…

Passionate experts
Awesome Apps
Lines of code
Cups of coffee

Our work

Recent projects

DIOR TV mobile application

DIOR TV mobile application

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Swish mobile application

Swish mobile application

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Wizito mobile application

Wizito mobile application

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Gaspard mobile application

Gaspard mobile application

View Project


View Project


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  • LOreal
  • Desk
  • SNCF2
  • CPAM
  • Galeries
  • Sephora
  • Dior
  • Gemalto2
  • Polytechnique

What we can do

Our Services


We like to engage from the very beginning of projects to make sure product conception and design match the needs of target audiences. We believe indeed that a close and early collaboration can both maximise development velocity and amplify future success. This first phase includes the profiling of addressable audience, the definition of use cases and tailoring the UX design

Design & Branding

Our team of UX and UI Specialists work to design both original and creative interfaces matching the functional specifications of your app. The “look and feel” of your product will set the tone for everything else. Also, we make sure that your users’ first impressions will reinforce their engagement from the beginning of their journey.


Development isn’t just about writing code. Our team of highly experienced developers aim to develop the most robust and performing solutions on the market. With experience across a wide range of technologies, we’ll select the most qualified solutions to develop your tailor-made application as efficiently as possible.

Marketing Strategy

Launching an app is no easy feat. But getting your app to the store is just the only half the battle. When it comes to marketing, there is no one-size-fits-all solution. And so Geronimo has built a robust network of in-house and partner marketing experts. While your app is in development, we will sit down with you to assess the marketing goals and opportunities for your app, then introduce you to our hand picked roster of experts.

Projet Cle-en-main


Regie Developpeur


Talented team

Our Management Team

Jerome Guilmet

Jerome Guilmet

Technical Director

Jerome is our Technical Director. He developed most of our proprietary solutions himself and is constantly improving our Development processes. MSc graduate of Harvard University and Ecole Centrale Paris.

Samuel Mottet

Samuel Mottet

Creation Director

Samuel is our specialist in Conception, Design and Product Strategy. He supervises all the Market Intelligence and Consulting activity of the Agency. MSc graduate of Cambridge University and Ecole Centrale Paris.

Raphael Assouline

Raphael Assouline

Sales Director

Raphael is our Sales & Marketing Guru, very much appreciated by our clients for guiding them throughout their development journey and downloads quest. Also responsible for Geronimo’s Public Relations. MSc graduate of Paris Dauphine University.

Charles Guillot

Charles Guillot

iOS Team Leader

Having himself developed numerous highly successful projects, Charles is our golden-hand iOS Genius and keeps the good habit of turning every app he works on into a huge hit! ENSEEIHT Master Graduate

Ugo Latergère

Ugo Latergère

Android Team Leader

In addition to leading the development of our Android team, processes and tools, Ugo is our expert in many emerging technologies, and very especially on internet of things problematics. UTC – ESSEC Master Graduate

Alan Toledano

Alan Toledano

Directeur Développement

In charge of our Business Development initiatives, Alan combines a deep understanding of both the technical and business stakes of big firms going mobile. He is thus the legitimate main point of contact for all our Key Customer Accounts. ESG Master Graduate


Ask for a Quote

Let us know your contact details, one of our sales representants will call you back asap !

33 rue d'Artois - 75008 Paris , FRANCE
+33 1 82 09 04 91