Other (as stated in the work)
Customizable CV template with a header.
It allow you to choose color theme, display optional personal information (age, address, pictures, etc.) with respect to English or French convention, define some sections on left bar (skills, etc.), and define some sections in the body (education, experience, etc.).
If you looking for a cover letter template which match with this CV, look for Arthur-Letter on Overleaf or on the following GitHub link.
More details and source files are available on GitHub.