IMS & PSTN Test / QA Engineer

Tata Consultancy Services; Bengaluru; On-site; INR 1,200,000 - 1,800,000; Full time

Job summary

Tata Consultancy Services is seeking an experienced IMS + PSTN Test / QA Engineer to validate voice services across IMS, VoLTE, and interconnect networks. The role focuses on ensuring high-quality service performance and interoperability.

You will execute various testing types, analyze SIP/SS7/ISUP signaling, and use tools like Spirent Landslide and Wireshark to troubleshoot issues. Collaboration with cross-functional teams is essential to deliver reliable validations.

Qualifications

• 5-8 years in Telecom Testing/QA.
• Hands-on Spirent Landslide.
• Strong knowledge of IMS/VoLTE/PSTN interconnect.
• In-depth SIP/SS7/ISUP protocols.

Responsibilities

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

Skills

Telecom testing

IMS VoLTE

PSTN Interconnect

SIP SS7 ISUP

Wireshark PCAP

Spirent Landslide

Tools

Spirent Landslide

Wireshark

Job description

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.