T.O.N Corporate Services – Our client provides businesses with a professional phone system that enables teams to manage customer calls efficiently. Their goal is to help businesses improve the quality of their customer interactions while enhancing operational efficiency.
We are recruiting to fill the position below:
Job Title: Infrastructure Support Manager
Location: Lagos
Employment Type: Full-time
About the Job
- We’re looking for an Infrastructure Support Manager to maintain, optimize, and scale our core voice infrastructure and networks.
- This includes managing VoIP systems such as FreeSWITCH, OpenSIPS, and Kamailio, handling SIP trunk configurations, and ensuring backend stability for reliable, high-quality calls.
- The ideal candidate is not only a hands-on engineer but also a strong collaborator who thrives on solving complex infrastructure problems, improving uptime, and ensuring performance. If that sounds like you, we’d love to meet you.
Key Responsibilities
Infrastructure Reliability & VoIP System Support:
- Maintain, monitor, and optimize FreeSWITCH, OpenSIPS, Kamailio, and other core VoIP infrastructure
- Troubleshoot and resolve SIP trunk issues to ensure consistent, high-quality voice service
- Build and maintain secure, scalable SIP server configurations (IVRs, routing rules, extensions, call queues).
Collaboration & Support:
- Interface with customers and internal teams to resolve VoIP- and network-related issues
- Support Product and Engineering teams with voice infrastructure needs and implementations
- Collaborate with Operations and Growth teams on CRM and call center tool integrations.
Network Performance & Security:
- Ensure network configurations (firewalls, NAT, QoS) support optimal VoIP performance
- Diagnose call quality issues using tools like Wireshark, RTCP, and SIP debugging utilities
- Implement secure call handling through SIP authentication, encryption, and compliance standards.
Documentation & Optimization:
- Keep infrastructure documentation up to date and accessible
- Implement best practices for upgrades, patch management, and performance tuning
- Contribute to cost-effective international routing strategies and billing systems
Key Success Metrics:
- Your performance will be measured by:
- Issue Resolution Time – Reduction in VoIP and network troubleshooting time
- Uptime & Availability – Maintaining >99.9% availability for all voice infrastructure
- Process & Documentation – Ensuring infrastructure documentation is always current and clear.
Qualifications & Experience
- 4+ years of experience with VoIP technologies (FreeSWITCH, OpenSIPS, Kamailio, Asterisk, etc.)
- Proven expertise in SIP trunking, PBX systems, call routing, and SIP protocol handling
- Strong networking knowledge: TCP/IP, NAT, VPN, QoS, firewalls
- Experience with tools like Wireshark, RTCP, and SIP command-line debugging tools
- Scripting and automation experience is a strong plus
- Familiarity with VoIP integrations with CRM and call center tools (e.g., Salesforce, HubSpot)
- Strong skills in documentation, incident management, and cross-functional communication.
Application Closing Date
Not Specified.
How to Apply
Interested and qualified candidates should:
Click here to apply online
