Position: VoIP Engineer
Category: Sysadmin
English level: upper
Years of experience: 10

Creating and supporting different type of call-centres and distributed cloud-pbx platforms, built on open-source software.
VoIP -  SIP, H.323, Asterisk (FreeBPX...), OpenSIPS/Kamailio, FreeSwitch (FusionPBX)
Network - VPN, iptables, bind, ALG...
DB - MySQL, Postgres
Virtualization - VmWare, Xen, Docker
Backups - rsync, Veeam, git :)
Languages (supportive) - PHP, Python, Lua, bash
Main idea - continue to work in telecom area and grow as specialist.

Right now work mostly as a freelancer, but if project is really interesting - can switch to full-time, but only for relocation projects.