IMS & PSTN Test / QA Engineer

Role: IMS + PSTN Test / QA Engineer

Experience: 5-8 Years

Location: Hyderabad | Bengaluru | Chennai | Delhi NCR

Job Description

We are looking for an experienced IMS + PSTN Test / QA Engineer with strong expertise in telecom testing, signaling protocols, and interoperability validation. The ideal candidate will be responsible for validating next-generation voice services across IMS, VoLTE, and PSTN/interconnect networks, ensuring high-quality service performance and reliability.

Key Responsibilities

• Execute functional, interoperability, integration, regression, and performance testing across IMS, VoLTE, and PSTN/interconnect environments.
• Validate end-to-end call flows and service behavior across telecom network domains.
• Perform load, stress, and scalability testing using Spirent Landslide.
• Analyze SIP, SS7, and ISUP signaling to identify and troubleshoot network/service issues.
• Conduct packet-level troubleshooting using Wireshark and PCAP traces.
• Develop and execute comprehensive test cases, test plans, and validation scenarios.
• Coordinate with cross-functional teams to resolve defects and ensure quality deliverables.
• Document test execution results, defect reports, and validation findings.

Required Skills

• 5-8 years of experience in Telecom Testing / QA.
• Hands-on experience with Spirent Landslide.
• Strong knowledge of IMS, VoLTE, and PSTN Interconnect testing.
• In-depth understanding of SIP, SS7, and ISUP protocols.
• Experience in functional, interoperability, regression, load, and stress testing.
• Expertise in Wireshark and PCAP analysis.
• Strong troubleshooting and debugging skills within telecom environments.

Thanks & Regards,

Md Shahid,TCS