Okan Mersinlioglu, PhD
Software Engineer || Full Stack Developer || Front-end & Back-end Developer || Sr. QA Engineer || Test Engineer
@Google || Ex-Meta, Ex-Apple, Ex-Disney
San Francisco Bay Area
Get In TouchAbout Me
Senior QA Engineer and Full-Stack Developer with 10+ years of experience delivering high-quality software at global companies including Apple, Google, Meta, Microsoft and Disney In Europe Spain Germany and USA California. Strong expertise in senior-level manual and automation QA, covering web, mobile (iOS/Android), XR, infotainment, and multimedia systems.
Experienced Project Lead and Project Manager, successfully managing end-to-end testing and development initiatives, coordinating cross-functional teams, defining test strategies, timelines, and ensuring on-time, high-quality delivery. Hands-on background in full-stack development, enabling close collaboration with engineering teams and effective issue triage from both quality and development perspectives.
PhD holder with a rare combination of research, engineering, and real-world product delivery experience across Europe and the United States. Currently based in California and authorized to work in the U.S.
*US Citizen
Professional Experience
Sr. QA Engineer at Google | Android XR Immersive Lab
Google | Mountain View, California | On-site
• Working on Smart AI Glasses and Galaxy XR projects at Samsung Immersive Laboratory.
• Testing on Android-based XR devices on Samsung Galaxy XR devices, Android Studio Emulators on Windows/Mac/Linux.
• Creating test plans, test cases, and automated scripts for XR/AR/VR applications.
• Collaborating with the test engineering team to improve product quality.
• Reporting, reviewing, and verifying bugs throughout the development cycle.
• Triaging 3rd-party partner issues globally and assigning them to the correct teams.
• Leading daily and weekly meetings with analytical and communication skills.
• Conducting dry run tests for immersive Android applications.
Sr. QA Engineer at Apple via Hogarth WW
Apple | United States | Remote | Flexible/Part-time
• Validating campaigns for Apple products across different geographies (Spain, Turkey, Chile, Portugal).
• Executing tests on Production and Stage platforms using real devices and Xcode simulators.
• Verifying UI elements, images, and functionality to identify and solve visual bugs.
• Creating, executing, and reporting manual test cases and plans using internal testing tools.
• Writing concise bug reports and presenting test results to project stakeholders.
• Reporting daily status and weekly metrics to the team.
Sr. QA Engineer at Meta (Reality Lab) via Qualitest Group
Meta | Burlingame, California | On-site
• QA Test Engiener in Medical Devices on wrist wearable devices, Oculus and Glasses AR/VR devices
• Performed testing on medical devices and health-related hardware.
• Conducted backend testing and data verification to ensure system integrity.
• Tested wrist wearable devices, including installing new builds and applications.
• Identified, reported, and tracked bugs using internal tracking tools.
• Participated in regular team meetings to provide testing updates and status reports.
Sr. QA Engineer Tech Mahindra and Accenture Flex
Google | Mountain View, California | On-site
Focused on Google Assistant for Automotive and YouTube Primetime Channels projects
Tested Google Assistant voice command integration specifically for Volvo XC90 vehicle using OEM Launcher display and Android/iOS phones.
Verified the accuracy, stability, and reliability of voice commands in automotive environments.
Validated YouTube Primetime Channels, identifying bugs in paid subscriptions and premium content.
Verified payment systems and trial period workflows for paid content.
Performed cross-platform testing on devices such as Apple TV and Android TV.
QA Lead at Warner Bros via Robert Half & The Sherlock Company
Warner Bros. Entertainment | San Francisco Bay Area | Remote
• Validated movie video quality and visual integrity to ensure high standards.
• Performed content validation across different geographies and countries.
• Verified metadata assets, including movie posters and artwork.
• Identified, reported, and helped resolve content and playback issues.
• Participated in team meetings to align on quality standards and project status.
QA Engineer at Apple via Hogarth WW
Apple | Sunnyvale, California
Testing software systems, web page and mobile Apps.
Test scenarios from architecture diagram through Salesforce, TestLink, HipTest and Jira.
Detected and reported bug issues, prepared file defect reports and reported test progress.
QA Engineer & Project Lead
MTP Métodos y Tecnologia | Madrid, Spain
Skills: Android Testing, Mobile Devices, Scrum, SDLC, Test Coverage, Kanban.
Education
Computer Software Engineering
🇺🇸 Clarusway, USA
Full Stack Developer || Front-end Developer || Back-end developer || Web and App developer || QA Engineer
Skills: SQL, API, Next.js, Jira, JavaScript, Sequelize.js, Express.js, React.js, GitHub, Visual studio code, PostgreSQL, MongoDB, Cascading Style Sheets (CSS), Bootstrap (Framework), HTML5, Vue.js, Postman API, Node.js, Agile Methodologies, TypeScript, Tailwind CSS, Redux.js, Linux
Doctor of Philosophy - PhD
🇪🇸 Universidad Complutense de Madrid, Spain
Activities and societies: Biomaterials, Nanomaterials, Medical Devices, Chemistry
Doctor of Philosophy - PhD
🇩🇪 University of Duisburg-Essen, Germany
Activities and societies: Visiting researcher for 3 months
Master's degree
🇪🇸 Universidad Internacional de Andalucía, Spain
Bachelor's degree, Materials Science and Engineering
🇹🇷 Afyon Kocatepe University, Türkiye
Get In Touch
I'm always open to discussing new projects, creative ideas, or opportunities to be part of your vision. Feel free to connect with me through any of the platforms below.
Email: okanmerx@gmail.com
Phone: US (+1) 669-216-3287