IT Network Engineer - PBX

CallTek, Inc.; Cebu City; On-site; PHP 334,800 - 558,000; Full time

Job summary

CallTek, Inc. is looking for a skilled technician in Cebu City to perform configuration and maintenance of PBX systems, troubleshoot network infrastructure, and provide technical support to end users. The ideal candidate should have an IT or Computer Science degree and experience with SIP, RTP, and voice codecs.

Additionally, knowledge in Zoom Phone and Asterisk-based systems is essential. Strong problem-solving abilities and team collaboration skills are required for this role, as well as a commitment to maintaining documentation and service level agreements.

Qualifications

• Degree or certification in IT or Computer Science.
• Proficient in configuring Flows, Routing, and Integrations.
• Able to diagnose call drops using network packet tracers.

Responsibilities

• Perform configuration and maintenance of PBX Systems.
• Troubleshoot network infrastructure issues.
• Provide technical support to end users.

Skills

SIP knowledge

RTP and WebRTC

Knowledge in Zoom Phone

Strong problem-solving abilities

Team collaboration

Education

IT / Computer Science-related degree or certification

Tools

Wireshark

Mikrotik

Tailscale

Netskope

Job description

Responsibilities

• Perform configuration and maintenance of PBX Systems. Including installation and configuration of softphones, managing User Accounts, Creation/Deletion of Queues/Flows, DIDs/TFNs, Extensions, Voicemails etc.
• Carry out Flows/IVRs and Call Routing design and implementation.
• Monitor network performance.
• Troubleshoot Network Infrastructure issues.
• Provide technical support to end users, resolving hardware and software issues efficiently.
• Diagnose problems, implement solutions, and escalates as necessary.
• Maintain documentation of common problems and solutions.
• Maintain service level agreements (SLA).
• Handle routine system maintenance (network/software/PBX)
• Participate in backup testing, business continuity, and recovery drills.
• Log ticket issues and document relevant information to come up with a resolution.
• Work with Security and Compliance to ensure IT infrastructure compliance with organizational policies, procedures, and industry standards.
• Collaborate with other teams – Corporate Connectivity, Managed Services, Engineering, Security, and Compliance.
• Help identify opportunities for process improvement, recommendations, upgrades, or new technologies.
• Able to stay current with industry trends and best practices to enhance operational efficiency.

Qualifications

• IT / Computer Science-related degree or certification.
• Knowledge in SIP, RTP and WebRTC, including voice codecs to optimize audio quality.
• Knowledge in Zoom Phone and Zoom Contact Center, Mitel, Vanilla Asterisk and other Asterisk based PBX Systems.
• Proficient in configuring Flows, Routing, Integrations etc. This includes scripting and APIs.
• Knowledge of SBC, MBG, and firewalls to secure voice networks, with a strong understanding of LAN/WAN routing and VLANs.
• Knowledge in Mikrotik, Tailscale and Netskope is a plus.
• Able to use Wireshark or other network packet tracer to diagnose call drops and SIP messages.
• Strong problem-solving and analytical abilities.
• Communication skills (technical and non-technical audiences).
• Time management and ability to prioritize tasks.
• Team collaboration and customer service orientation.
• Adaptability and willingness to learn new technologies.
• Attention to detail and documentation practices.