Job Description

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