Backend: Rust, PHP, JavaEE
Database: MariaDB, PostgreSQL, Redis, Firebase
Structure: HTML, a11y, CSS, Bootstrap, Sass
Frontend: JS, Vue.js, ES6, SSR, Nuxt.js
PWA: Lighthouse, PRPL, WebSockets, ServiceWorkers
Communication: REST, SOAP, JSON API
Auth: JWT, Cookie, OAuth, Basic
Security: CORS, TLS, Kryptografische Verfahren
Principles: SOLID, TDD, DDD
Servers: Nginx, Apache, Tomcat
DevOps: Unix, Docker, AWS
Blockchain: Bitcoin, Lightning network