Remote VoIP Engineer (3CX Specialist)

About the role

An established technology services business is looking for a specialist VoIP / telecoms support engineer to support its UK-based business customers across hosted and on-premise telephony environments. The position is remote, based in South Africa, and covers everything from day-to-day configuration and customer changes to investigating SIP, networking and call-quality issues.

Key responsibilities

• Support hosted and on-premise VoIP telephone systems for business customers.
• Configure and support 3CX environments.
• Manage telephony moves, adds and changes.
• Diagnose and resolve VoIP and SIP-related faults.
• Investigate call-quality issues such as dropped calls, one-way audio and latency.
• Use Wireshark and packet captures to investigate complex telephony and network issues.
• Troubleshoot voice-related networking across QoS, NAT, firewalls and VLANs.
• Support and configure Yeastar environments.
• Work directly with customers to understand technical issues and take ownership through to resolution, escalating complex issues where needed.

Required profile

• Hands-on 3CX experience is the priority; you must have configured, supported and troubleshooted 3CX, not just worked in an environment where it was used.
• Previous experience supporting business customers in a telephony, telecoms or MSP environment.
• Experience diagnosing VoIP and call-quality problems.

Required skills

• Strong SIP knowledge and understanding of common voice codecs.
• Hands-on Yeastar experience.
• Wireshark for packet capture and analysis.
• Networking fundamentals, especially QoS, NAT, firewalls and VLANs.

Advantageous: 3CX certification, Bicom Systems, Microsoft Teams telephony, direct routing and broader IT infrastructure or support experience.