Infrastructure Support Engineer
Infrastructure Support Engineer
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Job Description
About PressOne Africa
We are growing fast and seeking an Infrastructure Support Engineer to own and maintain the infrastructure powering our business phone platform. This is a critical highimpact role for a technical problemsolver who is passionate about uptime scalability and the backend systems that drive business communication.
Role Overview
The Infrastructure Support Manager will be responsible for maintaining optimizing and scaling our core voice infrastructure and networks. This includes supporting VoIP systems (FreeSWITCH Opensips Kamailio) SIP trunk management and backend configurations critical to call reliability.
The ideal candidate will not only be a handson engineer but also a strong collaborator working with other teams to solve routing issues enhance performance and ensure our infrastructure supports business goals. If you thrive on solving complex infrastructure problems and care deeply about uptime clarity and performance this role is for 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 high call quality.
- Build and maintain scalable and secure SIP server configurations (IVRs routing rules extensions call queues).
Collaboration & Support
- Interface with customers and internal teams to resolve network and VoIPrelated issues.
- Support product and engineering teams with voice infrastructure requirements and implementation.
- Collaborate with operations and growth teams on CRM and call center software integrations.
Network Performance & Security
- Ensure network configurations (firewalls NAT QoS) support optimal VoIP performance.
- Diagnose call quality issues using tools like Wireshark RTCP and other SIP debugging utilities.
- Ensure secure handling of calls through SIP authentication encryption and compliance.
Documentation & Optimization
- Maintain uptodate documentation for infrastructure configurations and processes.
- Implement best practices for upgrades patch management and performance tuning.
- Contribute to costeffective international routing and billing systems.
Key Success Metrics
- Issue Resolution Time Reduce VoIP and network issue resolution time across the business.
- Uptime & Availability Maintain >99.9 availability for all voice infrastructure.
- Process & Documentation Ensure critical infrastructure documentation is always current and accessible.
Requirements
- 4 years experience in VoIP technologies (FreeSWITCH Opensips Kamailio Asterisk etc.
- Proven experience with SIP trunking call routing PBX systems and SIP protocol handling.
- Strong networking knowledge: TCP/IP NAT VPN QoS and firewall configuration.
- Experience with tools like Wireshark RTCP and CLIbased monitoring/debugging.
- Solid scripting experience and familiarity with automation tools is a plus.
- Handson experience integrating VoIP with CRMs or call center tools (e.g. Salesforce HubSpot).
- Strong documentation troubleshooting and incident management skills.
- Ability to communicate technical concepts clearly across teams.
Benefits
- Build the infrastructure powering thousands of business conversations daily.
- Own your domain this is a handson role with high impact.
- Join a fastgrowing company with a strong engineering culture.
- Competitive salary performance incentives.
- Be part of the team shaping how African SMEs communicate.
Employment Type
Full Time
