FullStack Web development :

• PHP (Symfony mainly)
• Javascript (VueJS / jQuery / NodeJS / React)
• CSS (Less / Sass)
• SQL (MySQL / PostgreSQL / Oracle SQL)
• Redis / Firebase
• API design (Express, API Platform)
• Documentation (Swagger, Nelmio)

Security & Systems :

• Linux (Debian and distributed mainly)
• Encryption
• Apache2
• SSH

CI-CD & Tools

• GitLab
• Github
• Jenkins (beginner)
• Docker
• Kubernetes (beginner)