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Okan Mersinlioglu, PhD

Full-Stack Developer & Sr. QA Specialist

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About Me

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Full-Stack Developer, Sr. QA Specialist & Project Lead


Driving Quality with a Global Perspective With a career spanning numerous esteemed multinational companies across Europe and America, I have built a robust foundation as a Senior Software QA Engineer and Project Lead. My track record is defined by the flawless, on-time, and high-quality delivery of significant projects. In leadership roles, I have guided valuable initiatives, providing organizations with the high degree of confidence needed to navigate critical decision-making processes and ensure successful outcomes.

Commitment to Continuous Growth

My dedication to excellence is fueled by a passion for lifelong learning. I continually advance my expertise through a comprehensive academic background, including a PhD, Master's, and Bachelor's degree in engineering. To stay at the forefront of technology, I supplement my formal education with modern certifications in high-demand areas like Full-stack Development and React Native App creation. This continuous development ensures my skills remain sharp and relevant in a rapidly evolving industry.

A World of Experience

Beyond my technical skills, I bring a unique global perspective shaped by exploring over 50 countries across Europe, Asia, and America. This immersion in diverse cultures has been instrumental in honing my soft skills. It has sharpened my ability to overcome complex challenges under pressure, make swift and effective decisions, and instantly apply new knowledge to solve difficult problems. It is this powerful blend of deep technical skill, proven leadership, and a broad worldview that empowers me to consistently deliver success.

Personal Achievements

Judo: In a Judo career spanning over 10 years, I have won more than 15 medals and certificates of achievement at the national level, including first, second, and third-place finishes.

Academic Achievements & Scholarships: I was awarded Spain's prestigious FPI (Personal Investigador Predoctoral) scholarship, enabling me to conduct scientific research for 5 years at the Complutense University of Madrid and successfully complete my PhD. I also studied at the University of Huelva in Spain through the Erasmus Student Exchange Program.

International Experience: I broadened my academic experience as a visiting researcher at the University of Duisburg-Essen in Germany. My scientific articles have been published in international peer-reviewed journals, and I have presented my work at major conferences.

Community Contribution & Leadership: I took an active role as a volunteer trainer in national projects organized by the European Union, delivering educational sessions to numerous high school students. For 5 years, I participated in national scouting activities, developing leadership and endurance skills in challenging outdoor environments.

US Citizen EU Work & Residence Permission

My Skills

Frontend

  • React JS
  • Next.js
  • Router & Hooks
  • HTML5 & CSS3
  • JavaScript (ES6+)
  • React & Next.js
  • Vue.js
  • Tailwind CSS
  • React Bootstrap
  • Redux / Redux Toolkit
  • Material UI
  • Typescript
  • Rest API Usage
  • SASS

Backend

  • Node.js & Express.js
  • Next.js (React framework)
  • RESTful APIs
  • Java (Spring Boot)
  • REST & GraphQL APIs
  • PostgreSQL, MongoDB

QA & Testing

  • Manual & Automated Testing
  • Cypress & Playwright
  • Selenium WebDriver
  • Jest & Vitest
  • Jira & TestRail
  • Postman & Newman
  • CI/CD Pipelines
  • Performance Testing
  • API Testing
  • Test Automation Frameworks
  • Version Control (Git)
  • Agile & Scrum Methodologies
  • TestTracker
  • Buganizer
  • Sherlog
  • Radar
  • Stage & Production Environments
  • Web, Device and Apps testing

Work Experience

12/2024 - Present

Software Engineer

Immersive Lab at Google Inc || Scalence in Mountain View, California, United States
  • Lead development of high-traffic web applications using React, Node.js, and PostgreSQL.
  • Created test plans and cases for XR/AR/VR applications, automated test scripts, and collaborated with test engineering team to improve product quality.
  • Collaborate with QA teams to design and implement end-to-end testing strategies with Cypress.
  • Worked on immersive and android apps for Android XR platform at Google Immersive Laboratory.
  • Led daily meetings and triaged bugs, demonstrating excellent analytical and communication skills.
02/2023 - Present

Software Engineer

Apple Inc. || Hogarth WW | Part-time, Freelancer & Remote
  • Fullstack engineering on Web & apps testing using HTML, CSS, JS, Typescripts, Node JS, React and more.
  • Performed mobile app across Android, IOS & Web
  • Created and ran test cases through internal test tool
  • Wrote concise and descriptive bug reports, presented test results to other project stakeholders clearly and effectively
  • Manually executed, designed and reported test case, and test plan across multiple platforms by using internal private and secure testing tools
  • Checked overlapping, design of descriptions and images web pages, functionality on the web pages and/or app, successfully avoided bugs and solved defects
05/2024 - 12/2024

Software Engineer

Meta Platforms, Inc. | Burlingame, California, United States
  • Assisted in developing and maintaining client websites using HTML, CSS, JavaScript, and PHP.
  • Gained foundational experience in both front-end and back-end development.
  • Software Developer in Medical Devices
  • Developed and maintained code for client websites primarily using HTML, CSS, Sass, JavaScript, and React JS
  • Implemented responsive design to ensure compatibility across various devices and browsers by working Redux, Node JS, SASS, Styled Components, React JS.
  • Collaborated with designers to implement clean interfaces and simple, intuitive interactions and experiences and working using Figma document testing via Jest/Cypress.
  • Worked with back-end developers to integrate front-end components with RESTful APIs, Mongo DB and more.
  • Conducted code reviews and provided constructive feedback to improve overall code quality
  • ● Optimized web applications for maximum speed and scalability
02/2021 - 02/2024

Software Engineer

YouTube & Google Assistant at Google Inc || Accenture Flex and Tech Mahindra in Mountain View, California, United States
  • Assisted in developing web applications using React frameworks,Created reusable components and front-end libraries and Figma using for future use, HTML, CSS, and JavaScript, SASS, React and more.
  • Participated in daily stand-ups and sprint planning sessions using Agile methodologies
  • Providing maximum quality on functionality on devices and web design and mobile apps
  • Find bugs and apply engineering rigor to reproduce and diagnose those bugs
  • Troubleshoot bugs filed to reproduce issues, verify steps to reproduce and prioritize for fixes
  • Report on backlog and progress made daily / weekly
10/2021 - 02/2022

Warner Bros. logo Software Engineer

Warner Bros, Inc. || The Sherlock Company || Remote during Covid-19, California, United States
  • Assisted in developing and maintaining client websites using HTML, CSS, JavaScript, and PHP.
  • Gained foundational experience in both front-end and back-end development.
  • Software Developer in Medical Devices
  • Developed and maintained code for client websites primarily using HTML, CSS, Sass, JavaScript, and React JS
  • Implemented responsive design to ensure compatibility across various devices and browsers by working Redux, Node JS, SASS, Styled Components, React JS.
  • Collaborated with designers to implement clean interfaces and simple, intuitive interactions and experiences and working using Figma document testing via Jest/Cypress.
  • Worked with back-end developers to integrate front-end components with RESTful APIs, Mongo DB and more.
  • Conducted code reviews and provided constructive feedback to improve overall code quality
  • ● Optimized web applications for maximum speed and scalability

Contact Me

I'm always open to discussing new opportunities and projects. You can reach out to me via email or connect with me on social media.

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