Senior VoIP Network Architect — Hybrid in Bloemfontein

Placements24; Bloemfontein; Hybrid; ZAR 720,000 - 900,000; Full time

Benefits offered by this job

Medical benefits

Retirement benefits

Hybrid work model

Remote workdays

Job summary

Placements24 is seeking a Senior VoIP Network Specialist for our Bloemfontein operations. You will design, implement, and support VoIP infrastructure including IP-PBX, SBCs, and gateways, ensuring high-quality voice services for clients.

You will troubleshoot complex calling issues, optimize network performance, and mentor junior engineers. A strong background in SIP/RTP, IP networking, and UC technologies, with relevant certifications, is highly desirable.

Qualifications

• Bachelor's degree in Computer Science, Information Technology, or a related field, or equivalent experience.
• Minimum of 5 years of experience in designing, implementing, and supporting VoIP networks.
• In-depth knowledge of VoIP protocols such as SIP, H.323, RTP, and SRTP.
• Experience with major IP PBX platforms (e.g., Asterisk, Cisco Call Manager, Avaya) and SBCs (e.g., Oracle Acme Packet, Audiocodes).
• Strong understanding of IP networking concepts, including TCP/IP, QoS, and VLANs.
• Familiarity with unified communications platforms is a plus.
• Experience with call detail record (CDR) analysis and troubleshooting.
• Excellent problem-solving, analytical, and communication skills.
• Relevant certifications such as CCNP Voice, CCIE Collaboration, or SIP certifications are highly desirable.

Responsibilities

• Design, deploy, configure, and maintain VoIP infrastructure, including IP PBX systems, gateways, and session border controllers (SBCs).
• Monitor VoIP network performance, identify bottlenecks, and implement solutions for optimization.
• Troubleshoot and resolve complex VoIP call quality issues, signaling problems, and connectivity issues.
• Ensure the security of the VoIP network against unauthorized access and threats.
• Collaborate with core network and IT teams to ensure seamless integration of voice services.
• Develop and maintain comprehensive documentation of the VoIP network architecture, configurations, and procedures.
• Stay updated on the latest advancements in VoIP, unified communications, and related technologies.
• Manage vendor relationships and evaluate new VoIP equipment and software.
• Provide technical guidance and mentorship to junior members of the network team.
• Participate in capacity planning and infrastructure upgrade projects.

Skills

VoIP protocols

SIP

RTP/SRTP

IP networking

UC platforms

CDR analysis

Mentorship

Education

Bachelor's degree in CS/IT

Tools

Asterisk

Cisco Call Manager

Avaya

Oracle Acme Packet

Audiocodes

Job description

Placements24 is seeking a Senior VoIP Network Specialist for our Bloemfontein operations. You will design, implement, and support VoIP infrastructure including IP-PBX, SBCs, and gateways, ensuring high-quality voice services for clients.

You will troubleshoot complex calling issues, optimize network performance, and mentor junior engineers. A strong background in SIP/RTP, IP networking, and UC technologies, with relevant certifications, is highly desirable.