QA Engineer - VoIP / SBC / Gateway Testing

Sangoma is looking for a QA Engineer with hands-on experience in VoIP and telecom testing to validate our NSC/SBC and Vega Gateway solutions. The ideal candidate will be responsible for functional, regression, interoperability, system, and performance testing while ensuring the quality and reliability of our telecom products.

Key Responsibilities

Design, develop, and execute test plans, test cases, and test scenarios
Validate SIP/ISDN signaling, VoIP call flows, media handling, SBC, and gateway features
Perform functional, regression, interoperability, end-to-end, system, and release testing
Analyze SIP traces, packet captures, and system logs to identify and troubleshoot issues
Validate SIP trunking, PSTN connectivity, codec negotiation, DTMF, T.38 Fax, and call routing
Collaborate with Development, Product Management, and Support teams to investigate, reproduce, and verify reported defects
Ensure product quality throughout the software development lifecycle

Requirements

Must-Have Skills

3+ years of QA experience in Telecom, VoIP,



Networking, or Unified Communications
Robust understanding of SIP and ISDN call flows and signaling
Solid networking fundamentals, including TCP/IP, UDP, NAT, VLAN, DNS, and DHCP
Experience testing SIP Trunks, Session Border Controllers (SBCs), Media Gateways, or IP-PBX systems
Experience creating and executing manual functional and regression test cases
Hands-on experience with Linux OS, Jira, and debugging tools such as Wireshark and tcpdump
Strong analytical and troubleshooting skills

Preferred Skills

Experience with Sangoma NSC/SBC and Vega Gateway products
Hands-on experience with SIPp and SIP phones
Knowledge of telecom technologies, including SIP Trunking, PSTN, PRI, FXO/FXS, and T.38 Fax
Experience working in cloud or virtual telecom environments
Basic scripting or test automation using Python or Shell scripting is an advantage

Qualifications

Bachelor's degree in Computer Scienc

📌 QA Engineer (Bengaluru)
🏢 Sangoma
📍 Bengaluru