Modem Engineers

Job Title: Modem Engineers

Location: Bangalore

L&T Technology Services is seeking a Modem Engineers (Experience range - 5+ years) of experience, proficient in:

Develop and execute comprehensive manual test plans and test cases for IMS features (VoNR, VoLTE, ViLTE, VoWiFi, RCS) and Modem functionalities (call processing, data throughput, mobility, power consumption), adhering to 3GPP specifications and protocols.

Perform regression, sanity, feature-specific, and performance testing to ensure the quality and stability of new software releases.

Isolate, reproduce, and accurately report defects using bug tracking systems such as Buganizer.

Perform initial test setup triage and verification of resolved issues.

Collaborate with development and integration teams to analyze test failures using tools such as ShannonDM, QXDM, or similar proprietary tools, identifying the root cause of issues related to signaling, protocol failures, or performance.

Excellent knowledge of test equipment platforms such as Anritsu,RNS with preference of Amarisoft system and work with Vendors to manage and maintain the equipment issues and software patch upgrade

Proficient in executing automated test cases via frameworks like Google LTP, with strong root cause analysis skills for script/infrastructure failures. Possesses solid knowledge of TCP flows and data communication.

Mandatory Skill Sets

Minimum Bachelor's Degree in Telecommunications Engineering or Computer Science with work experience of 5+ years

Understanding of mobile wireless concepts based on 3GPP standards and protocols, and knowledge of call flows in 3G, LTE & NR

Working Knowledge in Python, Java frameworks

Experience in wireless modem (3G, 4G, 5G) protocol testing with mobile handset with preference in Android framework/ system testing

Good understanding of 3gpp specs from UE specific procedures

Working knowledge of IMS protocol stack architecture /specification

Required Skills: IMS protocol, 3GPP standards, Python/Android.