The Fyrstain company

As the first FHIR® certified company in France, we are proud of our local implementation.


The company Fyrstain

Fyrstain is a medical software interoperability consultancy specializing in the HL7® FHIR® standard.

Noticing a lack of knowledge in France about the standard, Luc Chatty created the company in 2022 in order to accompany companies and health structures in the paradigm shift caused by the arrival of the standard and the covid-19 crisis.

Because FHIR® is a paradigm shift, the strength of our team lies in the dual technical and business orientation of its collaborators, who benefit from medical experience at various levels.

The founder

Luc Chatty

HL7 FHIR® Proficient

Biomedical engineer by training at Phelma, Luc Chatty spent a year working at Houston Methodist Hospital as a research engineer, then on high-value IT projects when he returned to France.

Determined to return to the medical field, he worked on the Gazelle platform, used during projectathons and connectathons, notably on simulators and validators for certain FHIR® profiles, and then on the SelfieSanté platform, a native FHIR® health platform for screening and monitoring at-risk populations for certain pathologies.


Fyrstain team


Technical leader

Wylem Bars

HL7 FHIR® Proficient

Expert and FHIR® developer having worked with Luc on the Gazelle and SelfieSanté projects, Wylem joined the team a few months after the creation of the company in order to head the technical department



Seuad Kassa

HL7 FHIR® Proficient

FHIR® expert and graduated of Polytech Grenoble, Seuad plays a key role as Project Manager for the Pandora test platform. As a functional analyst, she contributes with her expertise to FHIR® modeling and specification, strengthening our functional pole. Her dynamic leadership and skills make her an important element in the management and development of the platform.


Diogo Neiva Abreu

A graduate of the ISIS engineering school (Computer Science and Information Systems for Health) and active member of the functional pole, Diogo contributes to FHIR® modeling and specification as a functional analyst. Hospital project manager, he manages strategic initiatives and ensures effective coordination of teams in order to drive innovation in the health field.


FHIR® and CQL Consulting Engineer

Omar Guendouz

HL7 FHIR® Proficient

FHIR® expert and graduate of a biotechnology engineering school in Algeria and a master’s degree in medical computing in France, Omar holds the position of FHIR® and CQL developer in the Technical Department. As Project Manager, he contributes to the development and optimization of clinical decision support systems and clinical quality measures.


Web developer

Aurélie Renou

A former medical secretary, Aurélie is a front-end web developer, bringing valuable user experience to our technical department. Her approach enhances development quality and plays a key role in the excellence of our solutions.


Morgane Rouillard

Formerly a caregiver for people with reduced mobility, Morgane assists the team by managing the administrative department.