Mobile Aplication/ Software test engineer

MOHAMMED SHAUKAT ALI

Senior *G / VoLTE Device Validation Engineer

Overland Park, KS Willing to Relocate Nationwide

**.*.********@*****.*** 929-***-****

US Citizen LinkedIn: hLps://www.linkedin.com/in/mohammed-ali-a4a6311ali/ PROFESSIONAL PROFILE

Senior Mobile Device & Wireless Valida4on Engineer with 11+ years of experience delivering carrier-grade LTE, 5G, and IMS solu4ons for Tier-1 U.S. operators including T-Mobile, Dish/Boost, and Samsung. Proven expert in 5G SA/NSA, VoLTE/VoNR, IMS signaling, device cer4fica4on, and E911 compliance. Highly skilled in field and lab troubleshoo4ng, protocol-level debugging using QXDM, QCAT, Wireshark, and automa4on-driven valida4on to enable on-4me, zero-surprise commercial launches.

CORE EXPERTISE

Wireless & IMS

5G SA/NSA • LTE • VoLTE • VoNR • VoWiFi • IMS • RTT • RCS • E911

Protocols & Signaling

SIP • LTE-EPC • 5GC • Diameter • TCP/IP • UDP • DNS • HTTP/2

Device Valida4on & Cer4fica4on

IODT • Field & Lab Tes4ng • CBRS • DSDS • Roaming • MVNO Onboarding

Debug & Test Tools

QXDM • QCAT • Wireshark • Shannon • XCAL • Spirent • Perfecto

Automa4on & CI/CD

Python • Appium • Selenium • Jenkins • TestNG

PROFESSIONAL EXPERIENCE

Senior Wireless Validation Engineer – T-Mobile

Insight Global Overland Park, KS Sep 2025 – Feb 2026

• Lead end-to-end device certification and network validation for LTE, 5G SA/NSA, VoLTE, and Wi-Fi features supporting flagship launches.

• Perform advanced protocol analysis (RRC, NAS, SIP, IMS) using QXDM/QCAT and Wireshark to isolate attach, call setup, and handover failures.

• Conducted RF testing and validation using oscilloscopes and Keysight test equipment for signal integrity, waveform analysis, and protocol-level debugging.

• Performed real-time network and IMS monitoring using NetScout to analyze call setup failures, RTP quality, latency, and packet loss.

• Leveraged Perfecto Mobile to execute large-scale remote device testing and automate regression suites.

• Used Citrix (CMS/CSM) for SIM/eSIM provisioning, feature enablement, and service validation in live network environments.

• Improved VoLTE call setup success rate (CSSR) by 12–18% through protocol-level IMS and SIP debugging using QXDM, NetScout, and Wireshark.

• Analyze BLE requirements and specifications (Bluetooth SIG, GATT profiles, use cases).

• Thoroughly analyze high-level (HLR) and low-level requirements (LLR) to develop comprehensive test cases covering functional and non-functional aspects

• Executed CBRS validation in Nokia/Ericsson LabVIEW environments.

• Achieved >99% emergency call success rate during E911 Phase I/II certification using True Call and Sable.

• Own E911 Phase I/II testing, ensuring FCC compliance and accurate PSAP routing across devices and wearables.

• Drive automation initiatives using Python, Perfecto, and Jenkins, reducing regression cycles and improving coverage.

• Designed Spirent test scenarios improving call setup success rate by 15%.

• Debugged LabVIEW scripts and optimized test workflows for reliability and accuracy.

• Collaborate with Core, RF, OEM, and chipset teams to resolve launch-blocking defects and support go/no-go decisions. Device Network Certification Test Engineer – Dish Network (Boost) V Dart Denver, CO Jul 2024 – Feb 2025

• Executed carrier certification (IODT) for Android and iOS devices across VoLTE, VoNR, DSDS, Wi-Fi 6E, and roaming scenarios.

• Delivered 100% IODT certification pass rate for Android and iOS devices across VoLTE, VoNR, DSDS, and roaming scenarios.

• Improved RTP voice quality (MOS +0.3 to +0.5) by isolating packet loss, jitter, and QoS issues via NetScout analysis.

• Integrated LabVIEW with test instruments (Keysight, Oscilloscope, Anritsu, NI DAQ, spectrum analyzers).

• Execute field testing and troubleshooting for call drops, IMS registration failures, mobility issues, and data instability.

• Performed extensive testing of cellular modem chipsets including Qualcomm, MediaTek, Samsung, and Intel, as well as mobile devices such as iPhone, Samsung, LG, and Motorola.

• Validated E911 emergency call routing with 100% PSAP reachability using True Call and Sable.

• Perform BLE throughput, latency, packet loss, and power consumption testing.

• Performed field troubleshooting for call failures, data drops, and mobility issues across multi-RAT networks.

• Validated IMS registration, SIP call flows, RTP media, voice quality KPIs, and SMS/data services.

• Supported SIM/eSIM provisioning, OTA updates, MVNO onboarding, and international roaming (USA/Mexico).

• Conducted field debugging to distinguish device issues from core or RF network problems.

• Delivered test reports, failure analysis, and readiness summaries to stakeholders. Wireless Network Test Engineer – Samsung (US Mobile) LTTS (L&T) Janesville, WI Jul 2023 – Jun 2024

• Delivered feature validation and certification for VoLTE, VoWiFi, LTE/5G mobility, RCS, RTT, and E911 services.

• Validated IMS registration, VoLTE call flows, SMS, data sessions, and SIM/eSIM provisioning.

• Performed field troubleshooting for call failures, data drops, and mobility issues across multi-RAT networks.

• Partner with Core, RF, OEM, and chipset teams to resolve launch-blocking defects.

• Reduced mobility-related call failures by 20% by validating LTE/5G handover and reselection behavior.

• Improved CBRS network stability metrics by 10–12% during Nokia/Ericsson lab validation.

• Validated SIM/eSIM provisioning, APN selection, PLMN acquisition.

• Plan and execute field / drive / walk testing for wireless devices and networks

• Designed Spirent test scenarios, improving call setup success rates by 15%.

• Utilized Keysight test equipment (signal generators, spectrum analyzers, network analyzers, and protocol testers) for LTE/5G RF, protocol, and performance validation.

• Expanded automation coverage using Appium-based mobile testing. Senior Software Test Engineer – T-Mobile

Wipro Overland Park, KS Mar 2021 – May 2023

• Validated 4G/5G core network software and IMS services for carrier-grade deployments.

• Developed Python automation frameworks for VoLTE, VoNR, and CSFB scenarios.

• Integrated automated testing into CI/CD pipelines using Jenkins.

• Conducted in-depth SIP, TCP/UDP, and IMS protocol analysis using QXDM and Keysight tools.

• Supported 5G Home Internet device testing, validating performance and stability under load.

• Collaborated with cross-funcfonal teams to ensure on-;me so=ware releases.

• Ensured lab safety, instrument maintenance, and adherence to calibrafon schedules for Keysight and oscilloscope equipment.

• Improved defect turnaround fme by 20% through early detecfon and detailed protocol analysis.

• Attend NPE Provisioning SIM/e-SIM migration Testing by using Citrix (CSM) tools collect data and get new Feature and Execute my Products Testing in LabView Environment.

Test Automa<on Engineer PNC Financial Services

Smart tech / PiRsburgh, PA (Hybrid) Feb 2019 – Dec 2020

• Designed enterprise-grade Selenium automafon frameworks (POM, TestNG, Maven).

• Automated regression tesfng for CECL financial reporfng applicafons.

• Ensured cross-browser compafbility and CI-aligned automafon delivery.

• Closely working with QA Lead and business team to prioritize Regression defects. Network Engineer (NOC)

Banglalion Communications Ltd. Dhaka, Bangladesh Oct 2010 – Jun 2016

• Operated and maintained nationwide 4G WiMAX network infrastructure supporting large-scale subscriber base.

• Performed network monitoring, fault management, and performance optimization.

• Conducted disaster recovery testing, audits, and security compliance checks.

• Installed and configured routers, switches, VPNs, and firewalls. EDUCATION

Bachelor of Science – Electrical & Electronic Engineering Stamford University Bangladesh

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