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FreeSWITCH Developer

FreeSWITCH Developer

Name: Jobpe
Address: T-Hub, Plot No 1/C, Sy No 83/1, Raidurgam panmaktha, Knowledge City Rd, Hyderabad, Telangana, 500081, IN
Telephone: +91-83339-09630
Price range: Free

Infra Payments

3 - 8 years

0 - 3 Lacs

Noida Greater Noida Delhi / NCR

Posted:1 week ago| Platform:

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Skills Required

Freeswitch opensips Asterisk Kamailio

Work Mode

Work from Office

Job Type

Full Time

Job Description

Are you passionate about cloud telephony, VoIP systems, and building next-gen PBX solutions? Were looking for a skilled FreeSWITCH Developer to help us develop a robust and scalable PBX panel for enterprise-level deployments.

Key Responsibilities:

• Design, develop, and maintain tools supporting a scalable cloud telephony infrastructure.
• Customize FreeSWITCH for audio/video conferencing, capable of 1000 to 1500 concurrent calls.
• Deep understanding of SIP, RTP, RTCP, NAT traversal (TURN/STUN), and TLS encryption.
• Build and deploy multiple FreeSWITCH instances behind load balancers for high availability.
• Analyze media stream issues using tools like Wireshark and debug SIP signaling errors.
• Work closely with frontend/mobile teams to develop API-driven PBX solutions.
• Integrate codecs like PCMU, PCMA, G729, Opus and support SDP offer/answer model.
• Collaborate on RTP Proxy, routed audio conferencing, and NAT traversal setups.
• Familiarity with SIP proxy servers (e.g. Kamailio/OpenSER) and Session Border Controllers (SBCs).
• Bonus: Knowledge of H.323, SIPX, WebRTC, and SMPP.

You Should Have:

• Strong hands-on experience with FreeSWITCH or other open-source telephony platforms.
• Deep understanding of telecom signaling protocols and VoIP architecture.
• Practical experience developing or supporting PBX platforms.
• Experience with SIP debugging and high-concurrency media handling.

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FreeSWITCH Developer