Looks like you have JavaScript disabled. For the full Twine experience, you will need to re-enable it.

Hi, I’m Orhan Cetin, a Senior QA Engineer with over a decade of experience validating web-based data applications and complex marketing tech platforms. I specialize in automation and manual testing, and I rely on SQL and relational databases for reliable data validation. I design scalable, high-performance test suites and integrate CI/CD and cloud workflows across backend and frontend stacks. I collaborate with developers, product managers and stakeholders to translate product requirements into test plans and measurable user-experience goals. My background spans API testing, browser automation, CRO-focused funnel verification and analytics-driven quality improvement across AdTech and digital marketing ecosystems.…Hi, I’m Orhan Cetin, a Senior QA Engineer with over a decade of experience validating web-based data applications and complex marketing tech platforms. I specialize in automation and manual testing, and I rely on SQL and relational databases for reliable data validation. I design scalable, high-performance test suites and integrate CI/CD and cloud workflows across backend and frontend stacks. I collaborate with developers, product managers and stakeholders to translate product requirements into test plans and measurable user-experience goals. My background spans API testing, browser automation, CRO-focused funnel verification and analytics-driven quality improvement across AdTech and digital marketing ecosystems.

Orhan Cetin

QA Engineer, Full Stack Developer, DevOps Developer, +1





Hi, I’m Orhan Cetin, a Senior QA Engineer with over a decade of experience validating web-based data applications and complex marketing tech platforms. I specialize in automation and manual testing, and I rely on SQL and relational databases for reliable data validation. I design scalable, high-performance test suites and integrate CI/CD and cloud workflows across backend and frontend stacks. I collaborate with developers, product managers and stakeholders to translate product requirements into test plans and measurable user-experience goals. My background spans API testing, browser automation, CRO-focused funnel verification and analytics-driven quality improvement across AdTech and digital marketing ecosystems.…Hi, I’m Orhan Cetin, a Senior QA Engineer with over a decade of experience validating web-based data applications and complex marketing tech platforms. I specialize in automation and manual testing, and I rely on SQL and relational databases for reliable data validation. I design scalable, high-performance test suites and integrate CI/CD and cloud workflows across backend and frontend stacks. I collaborate with developers, product managers and stakeholders to translate product requirements into test plans and measurable user-experience goals. My background spans API testing, browser automation, CRO-focused funnel verification and analytics-driven quality improvement across AdTech and digital marketing ecosystems.

Available to hire

Hi, I’m Orhan Cetin, a Senior QA Engineer with over a decade of experience validating web-based data applications and complex marketing tech platforms. I specialize in automation and manual testing, and I rely on SQL and relational databases for reliable data validation. I design scalable, high-performance test suites and integrate CI/CD and cloud workflows across backend and frontend stacks.

I collaborate with developers, product managers and stakeholders to translate product requirements into test plans and measurable user-experience goals. My background spans API testing, browser automation, CRO-focused funnel verification and analytics-driven quality improvement across AdTech and digital marketing ecosystems.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Work Experience

Senior QA Engineer at Turing

September 2, 2024 - Present

Designed and implemented automated regression suites using Cypress to validate direct-to-consumer funnel flows and conversion events in web-based data apps. Improved release confidence and reduced regression execution time by 47%, enabling 33% more weekly deployments across the AdTech platform. Integrated Cypress with Jenkins and Docker to run end-to-end tests across frontend and backend stacks, shortening CI feedback and speeding onboarding for new PPC partners. Authored API contract checks using Postman and automated REST API tests to verify data ingestion and attribution records, decreasing API-related discrepancies by 33%. Built cross-browser test coverage using Playwright and BrowserStack for critical conversion pages, increasing cross-browser pass rate and ensuring consistent UX for target audiences. Collaborated with developers, product managers and stakeholders to define acceptance criteria and test plans, enhancing first-pass acceptance by 36%. Maintained test documentation an

Automation QA Engineer at Turing

July 2, 2023 - September 2, 2024

Implemented automated test frameworks using Selenium and PyTest to validate campaign management UI and reporting dashboards in a D2C marketing stack. Reduced manual regression effort by 52% and increased test coverage for critical AdTech workflows by 44%. Built data-driven tests to cover nightly ETL processes and API-backed features. Coordinated with product and engineering teams to create reusable test helpers and maintain robust CI pipelines with GitHub Actions and Jenkins. Created cross-browser tests with BrowserStack to ensure stable UI behavior across major browsers.

QA Engineer at IT Gix

October 2, 2021 - May 2, 2023

Developed end-to-end test suites for the ecommerce data platform and reporting dashboards. Implemented API-level checks using Postman and REST APIs to validate data transformations. Integrated with Dockerized services and Docker Compose; wired CI with Jenkins. Improved detection of data mismatches and reduced flaky tests by introducing retry logic and stable test data sets. Collaborated with stakeholders to refine acceptance criteria and test plans, achieving higher test pass rates.

QA Engineer at IT Gix

May 2, 2018 - October 2, 2020

Built automated UI tests for marketing data tools using Selenium and Cypress; introduced test harness to validate customer journeys across landing pages and product flows. Reduced production regression escapes by improving test coverage and reliability. Implemented Continuous Integration checks and integrated with Postman for API validations. Created test dashboards to visualize metrics and track defects.

Junior QA Engineer at HAVELSAN

September 2, 2017 - March 2, 2018

Developed mission-critical web tool test cases and documented results. Created basic automated checks with Selenium to verify login flows and core functionality, reducing post-deployment regressions in safety-sensitive contexts. Supported QA initiatives and improved test clarity for the team.