Position: PHP Software Engineer
Category: PHP
English level: intermediate
Years of experience: 5

WebRTC - highload system with chats (100+M. messages = 0.35 sec search), sip calls, angular widgets system (free and paid).
2015 - 2018 study + freelance (long CMS list *should be* here)
2018-2022 software php developerin the company, was engaged in support, development, mentoring, organization of work processes. Served the Dutch company which provides telecom and data services (sip, voip telephony, internet services, etc.). As knowledge grew, so did the level of responsibility, and in 2020 I received a new project - webrtc (browser-browser calls, browser-phone, phone-browser, inc. widgets like phone call management, chats, contacts, call history and so on). The following stack was chosen for development: Lumen php framework (back-end) + CLI Angular (front-end), + node.js for calls services, centrifugal for push-notifications, used 2 databases: elasticsearch (chats, all history & logs, contacts and so on) and mysql (sessions, authorisation, chats lists, and other). For browser-browser calls, the Janus Gateway server was used, browser-to-phone/phone-to-phone (SIP-telephony) used its own sip server + flashphoner (over time it was replaced with  own pbs-server + scripts for it). Over time, I began to go more into mentoring and solving more global problems. I always use the principles of KISS, DRY, SOLID, stick to the PSR recommendations.
I always want to learn something new, interesting and understand the complex. 
Not CMS, ha-ha, sorry, but no.