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Middle
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from 2 years
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We are looking for a VoIP / Asterisk Engineer (Middle) with 2+ years of experience to support and develop our in-house IP telephony. The main focus is on Asterisk, SIP, Linux, and telephony integration with backend systems. Our IP PBX covers the full cycle of telephony operations: SIP agent registration, call routing, call recording, CDR storage, attack protection, REST API, and SIP traffic monitoring.
Main tasks — Support and development of an Asterisk-based IP PBX. — Configuration of dialplans, SIP trunks, SIP agents, and call routing. — Integration of backend applications with Asterisk via ARI/AMI. — Diagnosis and resolution of issues with SIP traffic and call quality. — Ensuring telephony security and fault tolerance: fail2ban, firewall, protection against SIP/brute-force attacks. — Working with CDR, call recordings, their storage, and rotation. — Infrastructure support: Linux, MariaDB/MySQL, Redis, Nginx, cron, Samba. — Configuration and support of monitoring systems (Grafana Alloy, Heplify). — Maintaining technical documentation.
Requirements — 2+ years of practical experience with Asterisk. — Good understanding of the SIP protocol: registration, NAT traversal, codecs, diagnosis of common problems. — Practical experience with ARI and/or AMI. — Confident Linux administration skills. — Experience with MariaDB/MySQL and basic SQL. — Understanding of network security and the principles of firewall/fail2ban. — Experience with Redis. — Experience configuring Nginx as a reverse proxy. — Understanding of network security principles (fail2ban, firewall, DDoS/brute-force protection). — Experience with monitoring systems (Grafana, Prometheus, or similar). — Independence and ability to diagnose technical problems.
Conditions — 5/2 work schedule.