VoIP Specialist

4 weeks ago

Islamabad, Islamabad, Pakistan Codistan Ventures Full time

We are seeking an experienced VoIP Specialist to set up, configure, and optimize our VoIP system for making outbound calls to the UK and Ireland from international locations. The ideal candidate must have expertise in VoIP trunk setup, call routing, cost-effective carrier selection, and automation of smartphone app usage for streamlined communications.

Responsibilities:

  • VoIP System Setup & Configuration
  • Set up SIP trunks with providers offering unlimited or low-cost plans for outbound calls to the UK & Ireland.
  • Ensure CLI (Caller Line Identification) presentation is correctly configured without using domestic CLIs.
  • Configure Asterisk, FreePBX, or similar VoIP platforms for call routing optimization.
  • Network & Security Optimization
  • Implement firewall rules, encryption (TLS/SRTP), and SBCs (Session Border Controllers) to enhance security.
  • Troubleshoot latency, jitter, and call quality issues using tools like Wireshark or VoIP monitoring software.
  • Automation & API Integration
  • Develop scripts or use automation tools to handle outbound call campaigns.
  • Integrate VoIP solutions with CRM, PBX, and smartphone apps for efficiency.
  • Testing & Compliance
  • Conduct test calls to validate call quality and cost-effectiveness.
  • Ensure compliance with UK & Irish telecom regulations and avoid blacklisted routes.

Minimum Skills & Experience:

  • 3+ years experience in VoIP system administration, SIP trunking, and call routing.
  • Hands-on experience with Asterisk, FreePBX, 3CX, Kamailio, or similar VoIP platforms.
  • Deep knowledge of SIP, RTP, STUN, TURN, and NAT traversal techniques.
  • Experience with VoIP carriers, CLI management, and avoiding call blocking issues.
  • Ability to troubleshoot VoIP latency, packet loss, and jitter issues.
  • Familiarity with Python, Bash, or Node.js for scripting & automation.
  • Strong knowledge of networking, firewalls (pfSense, Cisco, Mikrotik), and VoIP security.

Preferred Qualifications:

  • Experience integrating VoIP with CRM systems (Zoho, HubSpot, Salesforce, etc.).
  • Understanding of telecom regulations in the UK & Ireland.
  • Certification in VoIP technologies (CCNP Collaboration, dCAP, etc.) is a plus.

Location: Islamabad, Pakistan

Job Type: Contract / Full-time

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