VoIP Engineer

About the Role

• We're seeking a skilled and proactive VoIP Engineer with at least 2 years of hands-on experience in SIP-based systems, Linux server management, and VoIP troubleshooting.
• If you've ever found beauty in a perfect SIP handshake or debugged NAT hell like a champ, youll feel right at home here.
• Youll be responsible for maintaining, optimizing, and expanding our IP telephony and unified communication infrastructureworking across Asterisk, FreeSWITCH, Kamailio, and other open-source tools.

Key Responsibilities

• Deploy, configure, and manage VoIP infrastructure (Asterisk, FreePBX, Kamailio, OpenSIPS, or similar)
• Monitor and troubleshoot call quality issues, SIP signaling, RTP media streams, and NAT/firewall behavior
• Manage Linux servers for VoIP applications service tuning, logs, security, cron jobs
• Handle integrations with CRM, call recording, SIP gateways, SBCs, and media servers
• Write and optimize dialplans, IVRs, and call routing logic using Asterisk or Lua/JSON for FreeSWITCH
• Analyze PCAPs and SIP traces using Wireshark, sngrep, Homer, or similar tools
• Work with networking and DevOps teams to ensure QoS, bandwidth, and latency optimization
• Maintain documentation for configurations, deployments, and internal processes
• Required Skills & ExperienceMinimum 2 years of VoIP experience in a production environment
• Strong knowledge of SIP, RTP, SRTP, SIP registration, and NAT traversal techniques
• Proficiency in Linux system administration (Ubuntu/RHEL) and bash scripting
• Practical experience with VoIP monitoring and debugging tools (e g , sngrep, tcpdump, Wireshark)
• Understanding of IP networking (TCP/UDP, DNS, DHCP, VLANs, routing)
• Ability to interpret SIP INVITE, 200 OK, BYE, REGISTER flows like poetry
• Good-to-Have (Not Mandatory, but Gold)Familiarity with Kamailio, OpenSIPS, or other SIP proxy/registrar solutions
• Experience with VoIP security measures (TLS, SRTP, fail2ban, SIP authentication)
• Exposure to SIPREC, TTS/STT, or AI-based call analytics
• Understanding of number masking, multi-tenant PBX, or contact center integrations
• Knowledge of monitoring stacks (Grafana/Prometheus) or VoIP-aware dashboards
• DevOps-friendly skills: Docker, Git, CI/CD pipelines

Education

• Bachelors degree in Computer Science, Information Technology, Electronics, or relevant field