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 ResponsibilitiesDeploy, 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.EducationBachelors degree in Computer Science, Information Technology, Electronics, or relevant field.