Freelancer profile translated to English.

Description

Full-Stack Developer (HTML, CSS, JS, PHP, MySQL, Node.js) + Systems & Networks Administration

Specialized in e-commerce maintenance (Prestashop, Shopify, Wordpress) and process automation (Python, custom scripts).

I address concrete technical issues:

- Diagnosis and bug resolution (JavaScript, PHP, databases).

- Mail server configuration and security (Postfix, SMTP, SPF/DKIM/DMARC authentication).

- Workflow automation and tool interconnection via API (Python).

- Database migration and maintenance

I can work on broad or specific topics. I adapt to your project

Industry field of expertise

Languages

Workplace preferences

Remote only

Primarily works remotely

Jet-tong
Webmaster
November 2025 - Today (9 months)
Marseille, France
Administration & optimization of the client's e-commerce site. Web marketing also actively managed (email campaigns, SEO...)
Implementation of email sending infrastructure MySQL VPS Postfix SEO
Syndicat Intercommunal du Grand Vallat,
Systems & Networks Administrator, Cybersecurity Referent
January 2020 - January 2022 (2 years)
13320 Bouc-Bel-Air, France
System and network administration (N3) for an IT park with over 100 servers and 300 users/client workstations. Also cybersecurity referent.

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Master 1 Cybersecurity
Ynov
2022
Master 1 Cybersécurité
Bachelor's degree in Systems & Network Administration
Ynov
2021
Bac + 3 Administrateur systèmes & réseaux

Florian Sejnera

Webmaster | Full-Stack Web Developer | SysAdmin