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Network & VoIP Helpdesk Technician at VIVANT CORP. Submit your resume in English. We are looking for a Network & VoIP Helpdesk Technician with hands-on telecom experience. Candidates must have real-world experience troubleshooting VoIP systems, SIP trunks, routers, switches, and WiFi networks. The role involves resolving call quality issues, connectivity problems, and basic network incidents in a live environment. Must be comfortable handling calls with commercial customers.. About the Role:. As a Network & VoIP Helpdesk Technician, you will serve as the first-line technical support for our clients, handling inbound and outbound calls and support tickets. You will diagnose and resolve common issues and ensure a positive customer experience through clear communication and structured troubleshooting.. Key Responsibilities of a Network & VoIP Helpdesk Technician. Provide . helpdesk support for VoIP phone systems and internet connectivity. Respond to . client calls, emails, and support tickets. Troubleshoot . VoIP call quality issues, phone registration, and connectivity problems. Diagnose and resolve . network-related issues involving routers, switches, firewalls, and WiFi devices. Assist with . PBX configuration changes.  such as extensions, call routing, and IVR (call tree) setup. Support . phone number porting and service provisioning for new clients. Configure and provision . VoIP phones and networking equipment. Document troubleshooting steps and . update support tickets accurately. Escalate complex issues to senior engineers when necessary. Follow up with clients to ensure issues are . fully resolved.. Tools & Technologies We Use. Cradlepoint. Ubiquiti. Meraki. Grandstream IP Phones. Vivant Proprietary PBX. Utiliko Business Management System. Common Issues You Will Troubleshoot:. VoIP phone registration issues. IVR / call tree configuration. Poor audio quality or dropped calls. Network connectivity affecting SIP/RTP traffic. Firewall configuration and NAT traversal issues. Internet connectivity problems. 3+ years of experience.  in technical support, helpdesk, or network/VoIP support.. Hands-on experience troubleshooting:. Firewalls. Network switches. Wireless access points (WAPs). PBX systems. VoIP phones. Strong understanding of networking fundamentals:. TCP/IP. DNS. DHCP. NAT. Familiarity with . VoIP protocols such as SIP and RTP.  is a plus. Strong . problem-solving and customer communication skills. Comfortable providing . phone-based technical support to business clients. Company Location: Brazil.