| Fluent | Working | Basic |
| Languages | ||
| German (native) English | ||
| Hardware | ||
| Microcontroller PC Electrical engineering knowledge | ||
| Communication | ||
| TCP/IP, IPv6 Ethernet Rest-APIs, HTTP, Websockets SMTP, POP3, IMAP | ||
| Operating systems | ||
| Unix/Linux MacOS, Solaris | Windows VxWorks | |
| Programming languages | ||
| C, C++ Ruby, Java Assembler (x86, Z80, sparc) regexp bash, make | Javascript Go | Haskell, Erlang |
| Data languages | ||
| HTML Json, XML, YAML | css, svg | |
| Products & Tools | ||
| git subversion nginx ssh, tor | Atlassian bitbucket, Jira Docker systemd | |
| Strengths | ||
| Multithreaded Design Debugging Not afraid of things I don't know yet. Willing to understand things I work with. | ||