Senior Telephony Engineer

About the Role We are looking for a highly experienced Senior Telephony Engineer to lead the administration, optimization, and continuous improvement of our enterprise communication systems. In this role, you will be responsible for managing high-availability VoIP platforms, PBX systems, SIP routing, and unified communications tools that support mission-critical operations. If you are passionate about advanced troubleshooting, designing scalable voice solutions, and ensuring exceptional call quality, this position is for you. Key Responsibilities Telephony Administration & Support Manage, configure, and maintain VoIP systems, PBX platforms, SIP trunks, IVRs, call routing, and telephony infrastructure. Troubleshoot complex voice issues (SIP, RTP, call routing, QoS, jitter, packet loss). Ensure high availability and performance of voice and communication services. Configuration & Optimization Create and manage extensions, queues, ring groups, call flows, and IVR menus. Implement improvements to enhance voice quality, stability, and system efficiency. Configure and maintain SBCs, gateways, firewalls, and network components supporting voice systems. Security & Compliance Implement security measures against SIP attacks, toll fraud, and unauthorized access. Maintain proper documentation, change management procedures, and compliance standards. Project Leadership Lead and support telephony implementation projects, upgrades, migrations, and integrations with CRM/CTI platforms. Collaborate with infrastructure, networking, operations, and external vendors. Required Qualifications Bachelor’s degree in Computer Systems Engineering, Telecommunications, Information Technology, or related field. 5+ years of hands-on experience with VoIP and enterprise telephony systems. Solid understanding of: SIP, RTP/SRTP Asterisk, Cisco UC, Avaya, Microsoft Teams Phone QoS, SBCs, Gateways Networking fundamentals (routing, switching, VLANs) Linux and Windows Server environments Experience using diagnostic tools such as Wireshark. Intermediate–advanced English proficiency (written and spoken). Preferred Qualifications Certifications (CCNA, CCNP, VoIP-related certs). Experience working in environments with high call volumes (BPO, Call Centers). Knowledge of scripting (Bash, PowerShell, Python) is a plus. Key Competencies Strong analytical and troubleshooting skills Ability to work under pressure and solve high-impact issues Effective communication with technical and non-technical teams Ownership, accountability, and attention to detail Project coordination and documentation skills