VoIP / Asterisk Engineer - Middle

We are looking for a Middle-level VoIP / Asterisk Engineer to support and develop our own IP telephony.

We need a specialist who is confident in working with Asterisk, SIP, and Linux, can understand telephony issues, and participate in the development of a full-fledged VoIP infrastructure.

Tasks: support and development of IP-PBX based on Asterisk; configuration of dialplan, SIP trunks, SIP agents, and call routing; integration of backend systems with Asterisk through ARI / AMI; diagnosis of SIP traffic and call quality issues; ensuring security and fault tolerance of telephony; configuration of firewall, fail2ban, protection against SIP and brute-force attacks; working with CDR and call recordings: storage, rotation, control; support of infrastructure on Linux, MariaDB/MySQL, Redis, Nginx, cron, Samba; configuration and support of monitoring through Grafana Alloy, Heplify; maintenance of technical documentation; participation in improving the architecture and stability of VoIP infrastructure.

What is important: at least 2 years of practical experience with Asterisk; confident understanding of SIP: registration, NAT traversal, codecs, routing, and diagnostics; practical experience working with ARI and/or AMI; confident Linux administration; experience working with MariaDB/MySQL and SQL; understanding of network security, firewall, and fail2ban; experience working with Redis; understanding of Nginx configuration as a reverse proxy; experience with Grafana, Prometheus, or similar monitoring systems; independence, systemic thinking, and the ability to find the cause of technical problems.