Modem Engineers

Overview

Test and validate IMS and modem features per 3GPP specifications.

Key Responsibilities

• test setup
• failure analysis
• manual testing
• regression testing
• defect reporting
• bug tracking

Tasks

● 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. ● 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.

Requirements

• python
• ims protocol
• 3gpp
• android
• bachelor's
• google ltp

What You Bring

● 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 ● 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 in Python, Java frameworks Required Skills: IMS protocol, 3GPP standards, Python/Android. ● 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 of IMS protocol stack architecture /specification ● 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.

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Benefits

Mandatory Skill Sets

About L&T Technology Services

-a leading provider of engineering and R&D services. -a focus on digital transformation and innovation in industries like aerospace, automotive, healthcare, and more. -cutting-edge solutions in IoT, AI, machine learning, and automation for smarter operations. -designing future-ready vehicles, enhancing medical technology, and optimizing industrial processes. -known for expertise in next-gen technologies and sustainable solutions for sectors like energy, transportation, and manufacturing. -an integral player in the global R&D ecosystem, partnering with top-tier firms for digitalization. -continuous investment in advanced technologies for engineering innovation and service delivery.

Sector Specialisms