Cyber:
- Log analysis, monitoring of IT incident
- SIEM, IPS/IDS
- DoS/DDoS analysis and real-time evaluation
- Malware Detection
Various languages and coding paradigms:
- C
- Java
- Haskell
- Python
- Nim
- Crystal
- Html, Php, Css, JS
Databases
- Postgres
- Sqlite
- Mysql
Operating systems:
- BSD: DragonflyBSD, FreeBSD, OpenBSD
- (GNU/)Linux: Gentoo, Alpine, Archlinux
- Windows