VoIP Engineer

We are seeking a results-driven and technically adept VoIP Engineer with 2–5 years of hands-on experience in the design, deployment, and optimization of enterprise-grade VoIP solutions. The ideal candidate will have deep expertise in SIP trunk configuration, Session Border Controller (SBC) deployment, IP PBX management, and troubleshooting complex VoIP environments.

Key Responsibilities:

• Configure and manage SIP trunks with major service providers, including registration, authentication, and NAT traversal
• Deploy, secure, and maintain Session Border Controllers (SBCs) for call routing, media handling, and NAT traversal
• Install, configure, and manage IP PBX platforms such as Grandstream UCM, Yeastar S-Series, 3CX v20+, and Asterisk FreePBX
• Design and implement call routing logic and dial plans, including digit manipulation, time conditions, and failover rules
• Ensure Quality of Service (QoS) for VoIP traffic using traffic shaping, prioritization, and network optimization techniques
• Integrate VoIP systems with PSTN gateways, legacy PBXs, IP phones (Yealink, Cisco, Grandstream), softphones (Zoiper, Bria), and WebRTC solutions
• Conduct deep-dive diagnostics and packet-level analysis using tools such as Wireshark and sngrep
• Monitor, troubleshoot, and resolve VoIP call issues through log analysis, CDRs, and SIP trace interpretation
• Deliver documentation and training to internal IT teams and end-users on VoIP systems and best practices.

Requirements:

• Solid knowledge of SIP, RTP, SRTP, and T.38 (FoIP) protocols.
• 2 - 5 years of experience as an Engineer providing VoIP Solutions.
• Proven experience with IP PBX platforms (Grandstream, Yeastar, 3CX v20+, Asterisk/FreePBX)
• Experience configuring and securing SBCs in a production environment
• Proficiency in dial plan creation, call flow design, and number normalization (E.164 formatting)
• Familiarity with VoIP quality assurance, traffic shaping, and QoS configuration
• Hands-on skills in packet capture and analysis using Wireshark, sngrep, and similar tools.

Preferred/Plus Experience:

• Networking fundamentals including switching, VLANs, NAT, and routing.
• Experience with cloud-based voice platforms such as Avaya Cloud Office and Cisco Webex Calling / CUCM Cloud
• Exposure to VoIP integrations with AWS and Microsoft Azure environments

Job Type: Full-time

Application Question(s):

• Current and expected salary package ?
• How many VoIP troubleshooting tools (e.g., Wireshark, sngrep, CDR analysis tools) have you actively used in diagnosing call issues?
• How many cloud-based voice platforms (such as Avaya Cloud Office, Cisco Webex Calling, or CUCM Cloud) have you worked with in a production environment?
• How many years of hands-on experience do you have with configuring and managing SIP trunks?
• On how many different IP PBX platforms (e.g., 3CX, Asterisk, Grandstream, Yeastar) have you deployed or maintained VoIP systems?

Experience:

• VoIP engineering: 2 years (Required)

Work Location: In person