VoIP Softswitch Professional

What You'll Do

• Configure and manage Class 4 softswitch routing, including LCR optimization and traffic management
• Configure and maintain billing and rating systems for accurate call processing and invoicing
• Set up and manage interconnections with customers, carriers, and vendor partners
• Analyze PCAPs using Wireshark/tcpdump to diagnose call quality, routing, and protocol issues
• Monitor system performance, capacity, and call quality through NOC tools
• Create, manage, and resolve trouble tickets, coordinating with customers and vendors
• Test and validate new routes and trunks for correct call flow and audio quality
• Troubleshoot SIP signaling, media path, codec, and connectivity issues
• Maintain detailed documentation of configurations, network diagrams, and interconnection specs
• Respond to alerts/alarms to minimize disruptions and maintain SLAs
• Participate in on-call rotation for 24/7 coverage

Requirements

• 2+ years hands-on experience with Class 4 softswitch platforms
• Experience with PeerEdge by 46 Labs strongly preferred, or similar platforms (SipNav, DeNova Labs, Veriswitch, FreeSWITCH, Kamailio, OpenSIPS)
• Proven experience configuring routing, billing, and rating systems
• Strong understanding of VoIP protocols: SIP, RTP, RTCP, SDP
• Proficiency with packet capture/analysis tools (Wireshark, tcpdump)
• Solid understanding of TCP/IP, UDP, networking fundamentals, and QoS
• Experience diagnosing codec issues, latency, jitter, and packet loss
• Familiarity with firewalls, NAT traversal, and SBCs
• Experience with NOC ticketing systems and procedures
• Strong documentation habits and attention to detail
• Excellent written and verbal English communication
• Ability to work independently and handle multiple priorities
• Preferred experience with CDR analysis and fraud detection/prevention
• Knowledge of SS7, ISUP, or TDM-to-IP gateways
• Scripting (Python, Bash, or similar) for automation
• Relevant industry certifications (Cisco, Juniper, VoIP-specific)
• Experience in a carrier / wholesale telecom environment