Legal Notice

Publisher (publication director)
Achile Coskun
Legal form: Entreprise individuelle (EI) — auto-entrepreneur
Registered business name: Achile Coskun — EI
SIRET: 933 882 276 00019
VAT number: Not applicable (TVA non applicable, art. 293 B du CGI)
Contact: contact@cestra.tech — +33 6 02 37 01 14

Trade name — "Cestra Technologies"
This website is published under the collective trade name Cestra Technologies by Achile Coskun — EI, which is the registered legal entity (SIRET above). Cestra Technologies is not a separate incorporated company: it is the commercial name used for an informal collective of independent freelancers (web, AI & data, cybersecurity). Other contributors invoice under their own legal structures when they are involved in a project. The contracting party is Achile Coskun — EI for services it invoices, or the relevant freelancer under their own status, as stated in the engagement.

Status of the contributors — important notice
The members of the Cestra collective are currently engineering students(élèves-ingénieurs) — engineers by skill, not yet certified (the engineering diploma is not yet awarded). The word "engineer" used on this site refers to the technical competencies practiced by each contributor and to their ongoing engineering studies. It is not a claim to the protected French title "Ingénieur diplômé". Clients are informed of this status before any engagement.

Website hosting
O2Switch: O2Switch, 222 Boulevard Gustave Flaubert, 63000 Clermont-Ferrand, France.

Data hosting (data processed via the website)
O2Switch: O2Switch, 222 Boulevard Gustave Flaubert, 63000 Clermont-Ferrand, France. Form data is not stored after processing.

Intellectual property
The "Cestra" name, logo and visual identity are used by the collective and may not be reproduced without prior written authorisation from the publication director.

Images used on this website are sourced from royalty-free image libraries (including Unsplash) and subject to their respective licences. Text and editorial content are the property of the publication director and the individual contributors, and may not be reproduced without prior written authorisation.

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