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Hi, I'm Ali Ersin Yildiz, a QA Engineer from Ankara, Turkey, with over 4 years of experience in UI, API, and database testing. I thrive in Agile environments and enjoy turning ambiguous requirements into solid test plans that improve quality and release reliability. I am passionate about learning new testing technologies, embracing automation, and collaborating closely with developers and product teams to deliver robust software. Outside work, I enjoy problem-solving and continuously expanding my skills through hands-on experimentation with new tools and frameworks.…Hi, I'm Ali Ersin Yildiz, a QA Engineer from Ankara, Turkey, with over 4 years of experience in UI, API, and database testing. I thrive in Agile environments and enjoy turning ambiguous requirements into solid test plans that improve quality and release reliability. I am passionate about learning new testing technologies, embracing automation, and collaborating closely with developers and product teams to deliver robust software. Outside work, I enjoy problem-solving and continuously expanding my skills through hands-on experimentation with new tools and frameworks.

Ali Ersin Yildiz

QA Engineer, Web Developer, Programmer, +4

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Hi, I'm Ali Ersin Yildiz, a QA Engineer from Ankara, Turkey, with over 4 years of experience in UI, API, and database testing. I thrive in Agile environments and enjoy turning ambiguous requirements into solid test plans that improve quality and release reliability. I am passionate about learning new testing technologies, embracing automation, and collaborating closely with developers and product teams to deliver robust software. Outside work, I enjoy problem-solving and continuously expanding my skills through hands-on experimentation with new tools and frameworks.…Hi, I'm Ali Ersin Yildiz, a QA Engineer from Ankara, Turkey, with over 4 years of experience in UI, API, and database testing. I thrive in Agile environments and enjoy turning ambiguous requirements into solid test plans that improve quality and release reliability. I am passionate about learning new testing technologies, embracing automation, and collaborating closely with developers and product teams to deliver robust software. Outside work, I enjoy problem-solving and continuously expanding my skills through hands-on experimentation with new tools and frameworks.

Available to hire

Hi, I’m Ali Ersin Yildiz, a QA Engineer from Ankara, Turkey, with over 4 years of experience in UI, API, and database testing. I thrive in Agile environments and enjoy turning ambiguous requirements into solid test plans that improve quality and release reliability.

I am passionate about learning new testing technologies, embracing automation, and collaborating closely with developers and product teams to deliver robust software. Outside work, I enjoy problem-solving and continuously expanding my skills through hands-on experimentation with new tools and frameworks.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

TypeScript

Intermediate

Language

Turkish

Fluent

English

Advanced

Work Experience

QA Engineer (Manual & Automation) at Constructor Tech

September 1, 2024 - Present

QA Engineer for Learn LMS. Responsibilities included manual and automated testing across UI, API, and database layers; boosted test coverage and streamlined regression cycles; implemented automation with Python and Selenium WebDriver during the first six months, later transitioning to Playwright with TypeScript for robust web UI testing; performed API testing with Postman and Swagger; conducted Kafka-based testing for message queues and event-driven workflows; used YouTrack for task/defect tracking; designed and presented test suites with Allure TestOps.

Quality Engineer III at MentorMate

August 31, 2024 - October 8, 2025

Increased automated web tests by over 200% and API tests by over 250% on the SleepSync project; verified user stories with automation; used C#, Selenium WebDriver, and NUnit for UI automation; API testing with Postman, Swagger, Charles Proxy, and RestSharp; wrote MSSQL queries for database testing; version control with Git and BitBucket; configured Azure DevOps for CI, smoke and regression suites, and parallel testing on BrowserStack; Jira for project management and TestRail for test management; participated in LeSS framework.

QA Engineer (Apprenticeship) at Nest Bridge

April 1, 2022 - October 8, 2025

Used Cucumber (BDD) framework with POM and Singleton design patterns; Java, Selenium WebDriver, and JUnit for UI Automation; API testing with Postman and REST Assured using Hamcrest; Jenkins for CI, smoke and regression testing, and Selenium Grid for parallel testing; implemented Gherkin language in feature files to improve readability for non-technical stakeholders.

QA Engineer (Apprenticeship) at FLEETA PS

November 30, 2021 - October 8, 2025

Fleet Management project work using a BDD framework; UI Automation Framework with Java, Selenium WebDriver, TestNG, and Maven.

QA Engineer (Manual & Automation) at Constructor Tech

September 1, 2024 - October 29, 2025

QA Engineer responsible for manual and automated testing of Learn – Learning Management System (LMS). Improved test coverage and regression reliability. Implemented automation initially with Python and Selenium WebDriver, later transitioning to Playwright with TypeScript for robust web UI testing. Executed API testing with Postman and Swagger, validated Kafka-based messaging, and ensured cross-service integrations. Used Git/GitLab for version control and CI/CD; tracked tasks and defects via YouTrack. Designed and presented test suites and reports with Allure TestOps to drive actionable quality improvements.

Quality Engineer III at MentorMate

August 31, 2024 - August 31, 2024

Contributed to a major automated testing uplift on the SleepSync project. Increased automated web tests by over 200% and API tests by over 250%. Automated web UI using C#, Selenium WebDriver, and NUnit; API testing with Postman, Swagger, Charles Proxy, and RestSharp. Wrote MSSQL queries for database testing; used Git and Bitbucket, configured Azure DevOps for CI/CD with parallel testing on BrowserStack. Managed tests in JIRA and TestRail and participated in LeSS framework implementations.

QA Engineer (Apprenticeship) at NEST BRIDGE

April 30, 2022 - April 30, 2022

Applied Cucumber (BDD) with POM and Singleton patterns; performed UI automation with Java, Selenium WebDriver, and JUnit. API testing with Postman and REST Assured using Hamcrest; CI with Jenkins and Selenium Grid for parallel testing.

QA Engineer (Apprenticeship) at FLEETA PS

November 30, 2021 - November 30, 2021

Worked on Fleet Management Project using a BDD framework. Contributed to UI automation with Java, Selenium WebDriver, TestNG, and Maven.