Telephony Engineer (FreeSWITCH, VoIP ) | Job #TX-7260 | In Office ~ Gurugram

Role Overview

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 environment.

Responsibilities

• Install, configure, and maintain FreeSWITCH in production environments from scratch.
• Design and implement call flows, dialplans, IVRs, conferencing, and call routing.
• Configure SIP profiles, gateways, trunks, and extensions.
• Troubleshoot SIP signaling, RTP media, and SDP negotiation issues such as one-way audio and call drops.
• Develop dialplans using XML, Lua, JavaScript, or Python.
• Integrate with CRM/ERP, REST APIs, WebSockets, and AI voice bots.
• Use Event Socket Library (ESL) for real-time call control.
• Configure WebRTC support including DTLS-SRTP, ICE, and OPUS.
• Deploy and manage on Linux (CentOS / Ubuntu) and cloud platforms like AWS, GCP, or Azure.

Requirements

• Minimum 4+ years of experience, with 3+ years specifically in FreeSWITCH production environments.
• Strong knowledge of VoIP technologies including SIP, RTP, RTCP, and SDP.
• Hands-on experience with Linux administration and debugging tools like sngrep and tcpdump.
• Experience with SQL (MySQL/PostgreSQL) for CDRs and reporting.
• Must be currently based in Delhi NCR.
• Immediate joiners or those with a 15-day notice period preferred.

Skills

• FreeSWITCH
• SIP
• VoIP
• WebRTC
• Linux