Roles & Responsibilities

We are looking for a FreeSWITCH Implementation Engineer who will be responsible for designing, deploying, configuring, integrating, and maintaining FreeSWITCH-based

VoIP platforms. The role involves working closely with SIP, RTP, WebRTC, IVR,

conferencing, call routing, and external integrations in a production setting.

- Key Responsibilities
- FreeSWITCH Core Responsibilities

 Install, configure, and maintain FreeSWITCH in production environments from the scratch.  Design and implement call flows, dialplans, IVRs, conferencing, and call routing with complete ownership.

 Configure SIP profiles (internal/external), gateways, trunks, and extensions

 Implement multi-tenant and high-availability FreeSWITCH architectures

- SIP, RTP & Networking

 Strong understanding of SIP signaling, RTP media, and SDP negotiation  Troubleshoot one-way audio, no-audio, call drops, registration failures

 Configure NAT traversal, firewall rules, and RTP port ranges

 Analyze SIP logs and traces (siptrace, sngrep, tcpdump)

- Dialplan & Scripting

 Develop Dialplans Using

- XML
- Lua / JavaScript / Python

 Implement Logic For





- Call queues for inbound and outbound calls
- Time-based routing
- Skill-based routing
- Failover and fallback handling
- Integrations & APIs

 Integrate FreeSWITCH With

- CRM / ERP systems
- Billing platforms
- AI voice bots (ASR/TTS)
- External WebSocket or REST services

 Use Event Socket Library (ESL)

- Inbound & Outbound ESL
- Real-time call control and monitoring
- WebRTC & Media

 Configure WebRTC support (DTLS-SRTP, ICE, OPUS)  Work with mod_verto, SIP over WSS

 Implement browser-based calling solutions

- Monitoring & Debugging

 Monitor system performance and call quality  Analyze logs and CDRs

 Optimize codec usage and RTP performance

 Handle live production incidents and RCA

- Deployment & Operations

 Deploy FreeSWITCH On

- Linux (CentOS / Ubuntu)
- Cloud platforms (AWS / GCP / Azure – preferred)

 Configure HA, load balancing, and scaling  Work with DevOps teams for CI/CD, backups, and automation

Skills: platforms,sip,call routing,voip,aws,amp,webrtc,routing,freeswitch

📌 Telephony Engineer (FreeSWITCH, VoIP ) (Gurugram)
🏢 CG-VAK Software u0026 Exports
📍 Gurugram