We Create Solutions

We are a Creative Team. We find the problems, Create Self Adaptated Solutions. Design, Algorithms & Development is our Passion.

Nous sommes une Equipe Créative. Nous identifions les problèmes, trouvons des solutions sur mesure, du cousu main. Calculer, coder & interfacer, c'est notre Passion.

Get Started

Know How

Recent Personal References of Employees



C, C++, Java, Javascript, JQuery, CSS3, Html5, Php, C#, Python, Shell, Batch, Javascript(Node JS), Cordova, Matlab, VB, R, Express, ctl.

Learn More


MySql, SqLite, NoSql, GISON, other SQL requester.

Learn More

Références personnelles récentes des collaborateurs

Learn More


BackEnd, Web Front End, API (Rest), object oriented server programming, languages interoperability, smartphone.

Learn More

Mathematical skills

Compétences mathématiques

Probability and statistics: signal processing, stochastic processes, time series.
Modeling, Simulation, Optimization, Numerical analysis.

Learn More



If you like our product features and our portfolio then you can get trial study

Get a Trial

Contact Us

Pour nous joindre

Get In Touch With HD21

6, avenue de Messine - 75008 Paris

+33 6 79 71 35 73


Heures de travail

Business Hours

Monday - Friday: 9 am to 18 pm

Saturday Á Sunday Sunday: days off