- Unit testing
- Caching
- Apache or Nginx
- Design patterns
- I18N
- Accessibility
- Secure coding practices
- Responsive design
- PHP frameworks
- Javascript frameworks
- REST
- Message queues
- Code debugging
- Code profiling
- Code refactoring
- System monitoring
- Docker
- Feature compatibility in different versions of HTML, CSS, PHP, MySQL, and JavaScript
- Cross-browser compatibility of all those features
- Git
- Selenium
- AJAX
- Web sockets
- TLS
- Software development effort estimation
- Benchmarking
- Load testing
- Data warehousing
- Code reviews
- Cron
- Web services oriented architecture
- Asynchronous architecture
- Curl
- Linux
- Software licenses
- Encryption
- Hashing
- Load balancing
- Geolocation
- OAuth2
- Web scraping
- Copyright and intellectual property responsibilities
- Writing effective bug reports
Y ahora que hago todo esto, ¿sigo aceptando trabajos por mil euros al mes?, pues muchos dirán, que suerte llegar a mileurista, ¿no?