FreeSWITCH engineer Job San Francisco area,California USA,IT/Tech

Job role:

Free SWITCH engineer

Location:

Bay ARea,CA

Key Responsibilities

Infrastructure Management:
Design, configure, and maintain Free SWITCH servers and VoIP gateways in multi-tenant and high-availability environments.
Call Routing & Logic:
Develop and optimize complex dialplans, IVR (Interactive Voice Response) systems, and Least Cost Routing (LCR) strategies.
Integration:
Connect Free SWITCH with third-party APIs, CRMs, billing systems, and modern AI backends using the Event Socket Library (ESL) or REST APIs.
Performance Troubleshooting:
Diagnose and resolve critical issues such as call drops, latency, jitter, and one-way audio using tools like Wireshark, sngrep, and tcpdump.
Protocol Expertise:
Manage signaling and media streams through deep knowledge of SIP, RTP, and WebRTC protocols. [, , , ]

Required Skills & Qualifications

Technical Foundations:
- Platforms:
  Strong Linux/Unix system administration skills (specifically Ubuntu or CentOS).
- Networking:
  Understanding of TCP/IP, DNS, NAT traversal (STUN/TURN/ICE), and firewall configurations.
- Languages:
  Proficiency in scripting for automation and custom logic, typically using Lua, Python, Java Script , or Bash.
Experience:
Most roles require a minimum of 3–5 years of hands-on experience in a production environment.
Preferred Tools:
Familiarity with related open-source projects like Kamailio, OpenSIPS, or Asterisk is often highly valued for load balancing and proxying.

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