I used TeX, a typesetting system designed and mostly written by Donald Knuth and released in 1978. TeX was designed with two main goals in mind: to allow anybody to produce high-quality books using a reasonably minimal amount of effort, and to provide a system that would give exactly the same results on all computers.
You can [try it online][] and you can [download it here][]. [try it online]: https://www.writelatex.com [download it here]: http://www.ctan.org/starter
There are several packages that provide functionality for writing curriculum vitae. Some of them are detailed here.
I chose moderncv because you can create a nice professional CV. You can [get it here][] and you can find [interesting questions here][]. [interesting questions here]: http://tex.stackexchange.com/questions/tagged/moderncv [get it here]: http://www.ctan.org/pkg/moderncv
To provide the LinkedIn logo, moderncv version 1.5 is needed.
I added some links to my talks. Because some people didn't realize about them, I added an external link symbol. To add this symbol package fontawesome is needed. You also have to use XeTeX or LuaTeX engine.
For my languages level, I used the Interagency Language Roundtable scale that consists of descriptions of five levels of language proficiency. I followed this scale because I wanted that my CV looked like my LinkedIn profile.
If you want to make a similar CV you should install TeX, moderncv 1.5, fontawesome and use my TeX template and run it with LuaTeX or XeTeX engine.
I want to thank Xevi Pujol, Olalla Novo, Damián Blanco and Luis Carrasco for their comments and contributions.