Open to opportunities

Manjurul User

@manjuruluser

Senior wireless software QA engineer specializing in 5G trials, protocol/log analysis, and network performance optimization.

United States

Message

What I'm looking for

I’m looking for a wireless QA role where I can lead 5G SA/NSA trial testing, deep log/protocol analysis, and performance optimization—working closely with R&D to isolate root causes and validate fixes end-to-end using strong tooling and clear success metrics.

I’m a Software QA Engineer focused on wireless testing and optimization of 5G new features across carrier/Device side, with hands-on experience in testing and debugging complex SA/NSA behaviors (EN-DC, VOLTE, LTE, W-CDMA) and building reliable KPI reporting workflows. I work directly with R&D to isolate call, mobility, and performance issues and verify fixes through repeat test cycles.

In 5G trials, I’ve executed ATT SA/NSA, TMO VONR, TMO SA/NSA, and multiple regional deployments, covering TP performance, DL/UL leg switch, RSRP imbalance, interference, Dynamic Power sharing, PC2, thermal mitigation, PSHO and blind redirection, REG/PDU reject investigations, and RLF/RandomAccess-related root-cause analysis. I also performed Verizon and LTE/NR feature validations such as 7CC UL 256 QAM (CBRS), n71 DSS CSI RS/DMRS mapping, and RF/PHY feature testing including FD-MIMO TM9/TM4 and 256 QAM/MBSFN style trial verification.

Before my current role, I served as a Staff Engineer and Field Engineer doing carrier trial projects and modem system testing (MST), including loading Meta/MPSS builds using JTAG/T32, writing IMEI with QPST, running CSFB/IRAT/IFHO, throughput and E911, and using log-driven workflows to pinpoint protocol or hardware/software issues. I’m strong in log analysis using Qualcomm proprietary tools (QxDM, QCAT, ShannonDM) and telecom protocol standards (3GPP/3GPP2 TS, IETF RFC), and I’m comfortable pairing Wireshark-driven evidence with issue tracking in JIRA/PLM to drive resolution.

Experience

Work history, roles, and key accomplishments

Current

Software QA Engineer

Current

L&T Technology Services Ltd

Jun 2021 - Present (5 years)

Executed 5G SA/NSA carrier trial testing across AT&T and T-Mobile, including EN-DC features, EPSFB/Call performance, TP performance, and DL/UL leg switch validation. Performed protocol and log analysis (RRC layers) using Qualcomm tools (QxDM/QCAT/ShannonDM) and reported defects for issues such as SCG/RACH failures, RSRP imbalance, and cell reselection/RLF conditions.

5G NR SA NSA Testing 5G EN DC (EN DC NSA EN DC)EPSFB And Call Performance Testing RRC Layer Protocol Analysis Wireshark Drive Test Hardware Troubleshooting 3GPP IETF Standards

Staff Engineer

BTI Solutions Inc

May 2016 - Sep 2020 (4 years 4 months)

Ran pre-production 5G NR field and lab trials for carriers (AT&T, T-Mobile, Verizon), validating scenarios for network registration, call processing/mobility, and multi-RAB behavior while capturing and analyzing logs to localize root cause. Supported Samsung device SIP/RRC testing and IMS/VoLTE issue investigation using ShannonDM/QCAT, and executed feature/regression testing including FD-MIMO, IMS

5G NR Test Execution LTE IMS VoLTE (SIP) Testing ShannonDM Wireshark Regression Testing JIRA PLM Defect Tracking

Field Engineer

Enterprise Solutions Inc

Performed functional, performance, and feature testing for LTE/WCDMA/UMTS/GSM modem chipsets (e.g., MSM and MDM platforms), including build loading (JTAG/T32), MBN/IMEI provisioning, and AT-command execution. Investigated radio and KPI issues (e.g., RLF, idle cell reselection failures, throughput deltas), ran crash scope analysis from core dumps, and executed LTE interoperability tests for 3GPP co

Modem System Testing JTAG T32 Build Loading QPST IMEI Programming AT Command Automation QXDM Log Collection IPERF Performance Testing CSFB IRAT IFHO Testing KPI Analysis (RLF Paging Setup)3GPP Compliance Testing

Education

Degrees, certifications, and relevant coursework

Institut Mines-Telecom

Certification, LTE Network Essentials

2020 -

Ongoing LTE Network Essential certification course.

Udemy

Certificate, 5G NR Radio Link Control (RLC) - RAN Layer 2

2020 - 2020

Completed a 5G NR Radio Link Control (RLC) Protocol (RAN Layer 2) course.

Michigan Technological University

Master of Science in Electrical Engineering, Electrical Engineering

Grade: CGPA 3.16/4

Earned an M.S. in Electrical Engineering at Michigan Technological University (CGPA 3.16/4).

Military Institute of Science and Technology (MIST)

Bachelor of Science in Electrical & Communication Engineering, Electrical & Communication Engineering

Grade: CGPA 3.02/4

Activities and societies: Achieved Gold medal in single and doubles in pong organized by pong on wheels; runner up in inter-department table tennis championship (MIST).

Earned a B.S. in Electrical & Communication Engineering from MIST (CGPA 3.02/4).