software development
- desktop software
- hardware control, e.g. of instruments
- platforms:
    - Python
    - C⁺⁺
    - Arduino

data analysis
- data processing
- graphical representation
- image analysis
    - conventional image processing
    - machine-learning based

server management
- os installation
- installation of selfhosted apps
- server maintenance

simple web design
- static websites (no shops etc.)
- plain html
- fast loading time
- no external javascripts