Role: IMS + PSTN Test / QA Engineer

Experience: 5-8 Years

Location: Hyderabad | Bengaluru | Chennai | Delhi NCR

We are looking for an experienced IMS + PSTN Test / QA Engineer with solid 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

📌 IMS & PSTN Test / QA Engineer (Bengaluru)
🏢 Tata Consultancy Services
📍 Bengaluru