VoIP Support Engineer

Project overview

Hello,

I am looking for a VoIP Support Engineer:

Main missions:

Profile sought

Technical Skills/Environment:

Work environment

📅 Start: ASAP

📍 Location: Paris

🏡 Modalities: Hybrid

🎢 Duration: 6 months renewable

👜 Status: Freelance or payroll management (company referenced in the PEPS union)

• Act as the L3 escalation point for complex incidents in VoIP, IP telephony, and contact centers
• Lead technical investigations and advanced troubleshooting in international multi-site environments
• Participate in and coordinate Major Incidents with rapid service restoration and crisis cell management
• Analyze and resolve call routing issues on Cisco CUCM 12.x
• Administer and optimize dial plans, SIP Trunks, gateways, and media resources
• Diagnose malfunctions related to Cisco Jabber and its dependencies (DNS, certificates, SSO)
• Provide support and troubleshooting for Cisco UCCX environments (CTI, JTAPI, Finesse, scripts, reporting)
• Operate and maintain Cisco CUBE as the primary SBC
• Perform SIP trace analysis, network captures, and voice quality diagnostics
• Produce Root Cause Analysis (RCA), post-mortem reports, and corrective action plans
• Implement and validate technical changes in compliance with ITIL and CAB processes
• Collaborate with Network and Security teams on QoS, Firewall, NAT, and WAN/LAN performance topics
• Manage technical relationships with Cisco TAC and telecom operators
• Maintain technical documentation, operating procedures, and knowledge bases
• Cisco CUCM 12.x
• Cisco Unified Communications Manager
• Cisco Jabber
• Cisco UCCX
• Cisco Finesse
• Cisco CUBE (Session Border Controller)
• SIP Trunking and operator interconnection
• VoIP / IPT / Unified Communications
• CTI / JTAPI
• SBC and SIP protocols

Project details

400 euros

• Start: ASAP
• Duration: 6 mois renouvelable
• Remote: hybrid
• Location: Toulouse, Occitanie, FR
• Rate: 48-50 EUR/h
• Languages: French