Денис

DENYS LANDAR
Manual QA Engineer (Mobile Devices) | Field & Network Testing | Team Lead
Email: [open contact info](look above in the "contact info" section) | Tel: [open contact info](look above in the "contact info" section) | Telegram: @DNS_LNDR
LinkedIn: [open contact info](look above in the "contact info" section) | Languages: Ukrainian (Native), Russian (Fluent), English (B2)

PROFILE
Result-oriented Manual QA and field test engineer with 4+ years of hands-on experience in mobile device software
testing, network validation and cross-market test coordination. Strong technical depth in 2G-5G network testing, log
capture and analysis (Qualcomm and MTK toolchains), and structured defect reporting in Jira and PDM. From 2023 to
2026, led test coverage across 10 countries as Team Leader, supervising on-site testers, reviewing their reports and
acting as the main technical contact for the customer's R&D team. Previously spent eight years on construction projects
(about 30 houses built), which built discipline, responsibility for quality and deadline-driven delivery.

KEY HIGHLIGHTS
• Mobile device QA: functional, app compatibility and modem/network testing across 2G/3G/4G/5G, VoLTE/VoWiFi,
SRVCC, CSFB and handover scenarios
• 10 countries: coordinated 1-2 on-site testers in each country, with 1-2 projects a month often running in parallel
• Quality gatekeeper: reviewed all reports and test documentation (issue descriptions, bug lists, test cases) and
filtered out invalid findings, e.g. network-related, before they reached the customer
• Defect lifecycle: registered issues in Jira and PDM, handled retests and validation of fixes together with the
customer's R&D team
• Log analysis: ADB, Qualcomm QXDM/QCAT/QPCAT/QPST and MTK ELT to isolate root causes

CORE COMPETENCIES
• Testing: manual functional testing, app compatibility, modem/network and field testing, issue reproduction,
retesting and fix validation
• Test documentation: test plans, test cases, bug lists, bug reports, daily reports
• Defect tracking: Jira, PDM
• Mobile & networks: 2G/3G/4G/5G (NR), VoLTE/ViLTE/VoWiFi/ViWiFi, IMS/SIP, SRVCC, CSFB, SMS/MMS, mobile data
• Tools & platforms: ADB, Qualcomm QXDM5/QCAT/QPCAT/QPST, MTK ELT, Android OS internals, driver setup, SQL
basics, UNIX, API/web service testing, basic C/C++
• Leadership & soft skills: team coordination, mentoring, cross-market communication, attention to detail, ownership
and responsibility

PROFESSIONAL EXPERIENCE

Manual QA Engineer, Mobile Devices (Freelance Contract) | HydSoft Jul 2026 - Present
• Perform manual testing of mobile devices: core functionality, app compatibility and modem/network behavior (2G
to 5G, VoLTE/VoWiFi, calls, SMS/MMS, mobile data).
• Capture and analyze device logs with ADB, Qualcomm (QXDM, QCAT) and MTK ELT tools to pinpoint root causes of
failures.
• Reproduce issues, write clear bug reports in English and follow them through to resolution with the customer's
teams.

Team Leader, STOTU Department | Thundersoft Ukraine Jun 2023 - Jul 2026
• Test coverage & execution: led in-country testing in 10 countries across EEA, Gulf and Asia-Pacific (Czech Republic,
Romania, Bosnia and Herzegovina, France, Sweden, Finland, Greece, Saudi Arabia, Australia, South Korea),
coordinating 1-2 on-site testers per country.
• Mobile & network testing: oversaw core functionality, app compatibility and modem testing; covered calls,
SMS/MMS, VoLTE/ViLTE/VoWiFi/ViWiFi, mobile data, handover, 5G/NR, IMS/SIP, SRVCC and CSFB scenarios.
• Log capture & analysis: captured and analyzed device behavior logs via ADB, Qualcomm QXDM/QPST/QPCAT, QCAT
and MTK ELT during mobility field testing.
• Quality control & defect tracking: reviewed all daily reports and test documentation (issue descriptions, bug lists,
test cases) and had errors corrected; filtered out invalid findings such as network issues unrelated to the device;
registered confirmed issues in Jira and PDM. Typically 6-8 issues per country per 10-day project, with projects often
running in parallel.
• Customer communication: primary technical liaison to the customer's R&D team: sent them verified daily reports,
handled retests and validation of fixes, and drove critical cases to resolution.
• Team leadership: mentored and onboarded new team members; coordinated project setup and kept testing
processes consistent across markets.

Freelance Construction & Renovation Work | Private projects, Ukraine Aug 2022 - Jun 2023
• Delivered short-term private construction and renovation projects for individual clients.

Field Test Engineer | Thundersoft Ukraine Aug 2021 - Aug 2022
• Upgraded mobile software on devices from multiple vendors and chipsets (Qualcomm, MediaTek, UniSoc).
• Developed and executed test plans and test cases; reproduced, documented and tracked issues and bug lists.
• Collected and analyzed device logs (QXDM, QCAT, ELT, engineering menus, service commands) and worked
extensively with ADB.
• Delivered testing projects on-site across multiple countries.

Construction & Renovation Specialist (Self-employed) | Private projects, Ukraine 2013 - 2021
• As part of a ~10-person crew, built about 30 private houses from scratch, plus a shooting range and a hangar for a
military-tech company, alongside many smaller roofing, facade and renovation orders.
• Worked directly with clients on scope and requirements; took responsibility for quality and delivered on schedule.
• Software Engineering degree (2013); in 2021 completed a QA course and retrained into IT.

EDUCATION & CERTIFICATIONS
Bachelor's Degree in Software Engineering 2009 - 2013
Kyiv State Maritime Academy after Hetman Petro Konashevich-Sahaydachniy
QA BASE Course - QA Start-Up Mar 2021 - Jul 2021
Software Testing, SQL, HTML/CSS, UNIX, Web Service Testing, API
• LinkedIn Learning: Software Testing Foundations - Bug Writing and Management
• LinkedIn Learning: Test Automation with Python 3 - Testing Web and Mobile