VoIP / Asterisk Engineer

Key Requirements • 3+ years of commercial experience in a relevant role. • Strong expertise in Asterisk (versions 13 and above). • Hands-on experience building and maintaining VoIP solutions for contact centers or fintech environments. • In-depth understanding of SIP and RTP protocols, including NAT and QoS. • Experience configuring and managing SIP trunks. • Experience configuring IVR workflows, agent queues, and skill-based routing, including fallback and overflow logic. • Experience with call recording, CDR, and CEL. • Strong Linux administration skills (Ubuntu/Debian) in production environments. • Practical experience securing VoIP infrastructure, including protection against brute-force attacks, Fail2Ban, firewall configuration, ACLs, and rate limiting. • Experience integrating Asterisk with external systems, including CRM, billing, antifraud solutions, and APIs. • Experience using AMI / ARI to integrate Asterisk with backend systems. • Understanding of financial systems requirements, including reliability, auditability, and logging. • Ability to quickly understand and troubleshoot complex or legacy systems. Responsibilities • Maintain and continuously improve the company’s telephony platform. • Ensure the stable operation of support, collections, and sales communication channels. • Configure and maintain IVR menus, call queues, and routing logic in line with business processes. • Integrate the telephony platform with internal services, including CRM, backend systems, and billing. • Ensure high availability and minimize system downtime. • Monitor call quality and key performance metrics, including SLA, ASR, and ACD. • Identify and resolve latency and call-quality issues. • Optimize system performance and support infrastructure scaling. • Upgrade and improve the existing VoIP infrastructure. • Create and maintain technical documentation covering call flows, routing, and integrations. • Collaborate with cross-functional teams, including backend, support, and security.