By job title I am a software developer, by license a Linux professional, but really I am a jack of all trades.
Many people working in small businesses and startups need to wear many hats. I write tools in Go, web apps in Elixir and automate stuff in Bash. I deal with data stores, schedulers, embedded systems, security, etc. Having a non trivial understanding of each part, I feel I have a solid understanding of the complex systems.
See my resumé.