WLAN Performance Testing - Staff Engineer

Company

Qualcomm India Private Limited

Job Area

Engineering Group, Engineering Group > Systems Test Engineering

General Summary

The WLAN Performance Test Engineer is responsible for validating the throughput, latency, RF performance of Wi-Fi products and Power efficiency under various real-world and lab conditions. The role ensures compliance with IEEE 802.11 standards and identifies performance bottlenecks at PHY/MAC layers.

Key Responsibilities

Performance Validation Conduct throughput testing using tools such as iPerf, IxChariot, octoScope, Spirent, or IXIA. Validate performance across different Wi-Fi standards (802.11ac/ax/be). Measure PHY data rate, throughput, Packet loss, Jitter, Latency, retransmission rate RF & OTA (Over-the-Air) Testing Perform RF validation including RvR, RSSI, SNR,Adjacent channel interference Simulate customer field environment and test performance with different devices including iOS, Mac, Android, Windows Execute testing inside shield boxes or anechoic chambers. Load & Scalability Testing Validate performance under high client density scenarios. Simulate concurrent traffic (VoIP, video streaming, web traffic). Interference Testing Test performance under co-channel and adjacent channel interference. Evaluate performance in 2.4GHz, 5GHz, and 6GHz bands. Automation & Scripting Develop automation scripts using C Sharp, Python. Automate log collection, KPI extraction and triaging. Debug & Root Cause Analysis Analyze packet captures (Wireshark). Interpret logs from AP, STA, and driver layers. Work with firmware and PHY teams for issue resolution. Establish performance benchmarks and release qualification criteria Mentor engineers, review test strategy/design and promote testing best practices Support customer escalations with in-depth performance analysis.

Required Skills & Qualification

Education: Bachelor’s or Master’s degree10-15+ years of experience in WLAN System or performance validationWireless Protocols: Strong understanding of IEEE 802.11 standards (a/b/g/n/ac/ax/be), OFDM, MIMO, MU-MIMO, QoS (WMM)Tools: Experience with IXIA / Spirent / Keysight test equipment, iPerf, WiresharkNetworking: Knowledge of TCP/IP stack and preferred experience in Layer 2/Layer 3 networking.Analytical tools: Expertise in log analysis tools (Wireshark, tcpdump) for troubleshooting connectivity and performance issuesAutomation framework development experience

Minimum Qualifications

Bachelor's degree in Engineering, Information Systems, Computer Science, or related field and 4+ years of Systems Test Engineering or related work experience.

OR

Master's degree in Engineering, Information Systems, Computer Science, or related field and 3+ years of Systems Test Engineering or related work experience.

OR

PhD in Engineering, Information Systems, Computer Science, or related field and 2+ years of Systems Test Engineering or related work experience.

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