Freeswitch Developer

Company Name: Webvio Technologies Pvt Ltd

Location: Okhla, South Delhi or Kolkata - Newtown

Job Type- Full-Time (Onsite)

Working Days: 5 Days Working

Experience Required: 4+ Years

Job Summary

Freeswitch/VOIP Developer

Key Responsibilities:

 Design, develop, deploy, troubleshoot, and maintain tools and services supporting our cloud telephony network.

 Expertise in SIP, RTP, RTCP, TURN, STUN, NAT, and TLS.  Customize FreeSWITCH for audio/video conferencing, ensuring it handles 1000-1500 concurrent calls.

 Proficiency in RTP Proxy and routed audio conferences.

 Understanding of SDP Protocol offer/answer.

 Work with load testing tools for FreeSWITCH audio conferences.

 Deploy multiple FreeSWITCH instances using load balancers.

 Debugging using packet captures.  Familiarity with SIP/RTP, H323 a plus.

 Collaborate with the mobile team on APIs and support.

Qualifications:

 Bachelor's degree in Engineering (B.Tech or MCA).

 3+ years of FreeSWITCH development or related VoIP technology protocols like SIP, RTP, and SMPP.

 Knowledge of codecs (PCMU, PCMA, G729, Opus) and open-source telephony technologies (FreeSWITCH, WebRTC).

 Proficient in Linux environments.

 Basic to intermediate SQL skills.

 Familiarity with network tracing tools (Wireshark/Ngrep).

 Strong problem-solving skills.

 Strong understanding of VoIP protocols (SIP, RTP), codecs, and related technologies.

 Solid knowledge of Linux operating systems and command-line tools.

 Proficiency in scripting languages like Bash, Python, or Perl for automation tasks.

 Understanding of networking principles, TCP/IP, DNS, DHCP, and routing protocols.

 Strong troubleshooting and problem-solving skills, with the ability to identify and resolve complex technical issues.

What We Offer

• Competitive salary and benefits package
• Flexible working hours and remote work options
• Opportunities for professional growth and learning
• Collaborative and innovative work environment

Salary - No bar for suitable candidate.

Note- Candidate must be an immediate joiner.