Ayhan Gezer - Senior QA Engineer / Test Automation...

Q: Where is Ayhan based?

Ayhan is based in Cologne, Germany .

Q: What languages does Ayhan speak?

Ayhan speaks the following languages: Turkish (Native), English (Advanced), German (Intermediate) .

Q: How many years of experience does Ayhan have?

Ayhan has at least 9 years of experience. During this time, Ayhan has worked in at least 7 different roles and for 8 different companies . The average length of individual experience is 1 year and 2 months . Note that Ayhan may not have shared all experience and actually has more experience.

Q: What is Ayhan's latest experience?

Ayhan's most recent position is Senior QA Engineer / Test Automation Engineer / SDET at Rewe digital .

Q: What companies has Ayhan worked for in recent years?

In recent years, Ayhan has worked for Rewe digital , Pharma mall GmbH , BWI GmbH , IT-Gesundheitsdienstleister aus Berlin , and Innenausbau mai&wand GmbH .

Q: Which industries is Ayhan most experienced in?

Ayhan is most experienced in industries like Information Technology , Pharmaceutical , and Retail . Ayhan also has some experience in Healthcare and Construction .

Q: Which business areas is Ayhan most experienced in?

Ayhan is most experienced in business areas like Quality Assurance , Information Technology , and Product Development .

Q: Which industries has Ayhan worked in recently?

Ayhan has recently worked in industries like Pharmaceutical , Retail , and Information Technology .

Q: Which business areas has Ayhan worked in recently?

Ayhan has recently worked in business areas like Quality Assurance , Information Technology , and Product Development .

Recommended expert

Cologne, Germany

Experience

Jan 2025 - Present

1 year 3 months

Cologne, Germany

Remote

Senior QA Engineer / Test Automation Engineer / SDET

Rewe digital

Consulting, designing, and implementing the software testing lifecycle for multiple Android apps and backends Introducing test automation with Appium, SpringBootTest, RestAssured Setting up and managing emulators Developing an E2E library, an integration library, a Testcontainers library, and other libraries Developing, implementing, and advising on CI strategies Building the test environment with Testcontainers and virtualization Developing and implementing test cases for integration tests and end-to-end tests Establishing a maintainable test architecture with low entry barriers to simplify the creation of automated tests Some tools and technologies used: JUnit, RestAssured, Testcontainers, Kubedock, Appium, Android emulator, Jira Xray, Mockito, WireMock, Spring Framework, Kotlin

Jan 2022 - Present

4 years 3 months

Senior QA Engineer / Test Automation Engineer / SDET

Pharma mall GmbH

Consulting, design, and implementation of the software testing lifecycle for the microservice architecture.
Ensuring that automated tests are seamlessly integrated into the test strategy and run reliably.
Continuously optimizing processes within the automation team to increase efficiency.
Developing an E2E framework.
Creating a comprehensive test plan to cover all aspects of microservices and interfaces.
Developing and implementing test cases for integration tests, contract testing, end-to-end tests, and load tests.
Setting up and managing test environments using Testcontainers.
Conducting reporting and test management with Jira Xray.
Conducting training and knowledge transfer for internal staff.
Keycloak testing and service virtualization with WireMock.
Introducing effective automated tests that significantly improved the quality of the microservices.
Simplifying and speeding up test processes through service virtualization and contract testing.
Building a stable and scalable test environment that accelerated development cycles.
Strengthening internal expertise through training and process optimization.
Tools and technologies used: JUnit, RestAssured, Pact, k6, Mockito, WireMock, Selenium, Selenium Grid, Jira Xray, Testcontainers, Spring Framework, Agile Testing, Keycloak Testing, GitLab CI, Allure / ExtentReports

Aug 2021 - Dec 2021

5 months

Senior Software Tester for iOS and Android Application

BWI GmbH

Comprehensive consulting, design, and execution of the software testing lifecycle for a mobile app on iOS and Android.
Researching and evaluating suitable testing tools, and creating a test plan and test design.
Defining criteria and analyzing various testing tools from Katalon to Selenium.
Advising on the optimal testing strategy for the mobile app.
Designing and creating a comprehensive test plan.
Writing test cases.
Setting up the test environment, including with Testcontainers.
Implementing tests.
Skills used: Selenium, Selenium Grid, Kaspresso, Appium, Testcontainers.

Apr 2021 - Jul 2021

4 months

Berlin, Germany

Test Automation Engineer

IT-Gesundheitsdienstleister aus Berlin

Developing and implementing automated end-to-end tests to validate complete user journeys.
Conducting load tests with Apache Benchmark to ensure scalability and stability of the web application.
Setting up and managing test environments with Selenium Grid for parallel test execution.
Tools and technologies used: Java, Selenium, Selenium Grid, TestNG, Apache Benchmark.
Ensuring the quality and reliability of the web application under high load.
Increasing test coverage and reducing manual testing effort.
Demonstrating scalability and performance for large user numbers.

Feb 2021 - Apr 2021

3 months

Test Automation Engineer for an Android Application

Innenausbau mai&wand GmbH

Developing and implementing integration tests and end-to-end tests to validate app functionalities.
Ensuring adherence to quality standards and requirements through automated test runs.
Collaborating with the development team to identify and fix vulnerabilities.
Reducing errors in the production environment by identifying and fixing issues early.
Improving app stability and user experience through comprehensive integration tests.
Saving time through test automation.
Tools and technologies used: Appium, TestNG, MockMvc, RestAssured, Agile Testing.

Mar 2020 - Jan 2021

11 months

Lead Developer and QA Engineer for a service marketplace app

Helpmade GmbH

Built the software development and QA infrastructure from scratch.
Designed and developed the mobile app (Android and iOS) for private service marketplace.
Developed the Android app using Java and a REST API built on Spring Boot.
Set up a relational database (MySQL) and a web server using AWS Elastic Beanstalk.
Led a team of freelancers and managed the development processes.
Oversaw and executed the entire software testing life cycle, implementing unit, integration, and end-to-end tests.
Successfully developed and launched the app with a stable backend architecture.
Established an effective QA process that significantly reduced the error rate and sped up development cycles.
Built a scalable system using cloud technologies (AWS, Firebase).
Tools and technologies used: Android (Java), Spring Boot, REST API, AWS (RDS, Elastic Beanstalk), Firebase, MySQL, JUnit, MockMvc, RestAssured, Appium.

Jun 2019 - Feb 2020

9 months

Lead Software Developer for an internal Android app

Praevencio GmbH

Analyzed company processes to find areas for optimization and digitization.
Developed an internal Android app for digitizing participant certificates, managing participants, order processing, and cross-location workflows.
Set up a relational database (MySQL), a load balancer, and a web server using AWS Elastic Beanstalk.
Developed a scalable REST API with Java Spring Boot.
Implemented and ran unit and integration tests to ensure stability and quality.
Successfully launched the app, improving efficiency in administrative processes.
Simplified and sped up cross-location tasks through digitization.
Reduced errors and manual data entry.
Tools and technologies used: Android (Java), Spring Boot, REST API, MySQL, AWS (RDS, Elastic Beanstalk), MockMvc, RestAssured, Espresso.

Jan 2017 - May 2019

2 years 5 months

Software Developer and QA Engineer

Veniture GmbH

Developed and customized Jira and Confluence applications to extend their functionality.
Built and trained a QA team for successful integration into software testing processes.
Implemented and executed integration and end-to-end tests for the developed applications.
Conducted quality assurance activities, including manual testing of complex requirements.
Created detailed test cases and comprehensive reports to document test results.
Established an effective QA process and strengthened internal QA expertise.
Improved the quality and functionality of Jira and Confluence applications.
Tools and technologies used: Java, JavaScript, Spring Boot, REST APIs, Docker, MockMvc, RestAssured, Selenium, Test Management for Jira.

Industry Experience

See where this freelancer has spent most of their professional time.

Experienced in Information Technology, Pharmaceutical, Retail, and Healthcare.

Information Technology

Pharmaceutical

Retail

Healthcare

Business Area Experience

See which departments and functions this freelancer has contributed to most.

Experienced in Quality Assurance, Information Technology, and Product Development.

Quality Assurance

Information Technology

Product Development

Summary

Experienced QA Engineer and Test Automation Engineer with deep expertise in microservices, test automation, and agile software development. Passionate about developing custom automation solutions to make testing processes more efficient and to sustainably ensure software quality.

Skills

Testing Tools & Frameworks

Selenium
Selenium Grid
Appium
Kaspresso / Espresso
Cucumber
Robot Framework
Postman
Restassured
Pact
Wiremock
Junit / Testng
Testcontainers
Jenkins
Gitlab Ci
Apache Jmeter
Gatling
K6
Xray
Zephyr Scale
Allure / Extentreports
Mockmvc
Mockito

Test Methods & Processes

Software Testing Life Cycle
Bdd
Tdd
Microservice Testing
Page Object Model (Pom)
Data-driven Testing
Contract Testing
Integration Tests
End-to-end Tests
Regression Tests
Exploratory Testing
Performance Testing
Load Testing
Service Virtualization
Automated Tests In Ci/cd Pipelines
Test Data Management
Scaling Test Automation
Monitoring And Observability
Tool Selection And Consulting
Agile Testing
Keycloak Testing
Clean Code
Cross-browser Testing
Parallel Testing

Programming Languages

Java
C#

Databases

Mysql
Postgresql
Mongodb

Software Architecture

Microservices
Monolithic Architecture
Domain-driven Design (Ddd)

Agile Methods

Scrum
Kanban
Pair Programming
Code Reviews
Agile Testing

Android

Retrofit
Rxjava2
Okhttp
Firebase
Picasso
Butterknife
Room
Jetpack

Development & Management Tools

Git
Docker
Kubernetes
Jira
Confluence
Notion

Amazon Web Services (Aws)

Aws (E.g. Rds, Elastic Beanstalk)

My Passion

Passion For Improving Software Quality Through Innovative Automation Techniques And Strategic Test Design.

Languages

Turkish

Native

English

Advanced

German

Intermediate

Education

Sep 2019 - Sep 2021

Berufskolleg Georg-Simon-Ohm

Information Technology Assistant and University of Applied Sciences Entrance Qualification · Information Technology Assistant · Cologne, Germany

Sep 2016 - Aug 2019

Technische Hochschule Köln

B.Sc. Computer Science · Computer Science · Cologne, Germany

Technische Hochschule Köln

M.Sc. Software Engineering · Software Engineering · Cologne, Germany

Statistics

Experience

Total positions 8

Experience in Information Technology 4.5 y

Avg length 1 y 3 m

Longest experience 4 y 2 m

Global Experience

Countries worked in 1 (Germany)

Primary country Germany

Expertise

Recent roles Senior QA Engineer / Test Automation Engineer / SDET, Senior Software Tester for iOS and Android Application, Test Automation Engineer

Main industries Information Technology, Pharmaceutical, Retail

Main business areas Quality Assurance, Information Technology, Product Development

Qualifications

Highest degree Master

Profile

Created

December 2024

Last Update

March 2026

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Frequently asked questions

Do you have questions? Here you can find further information.

Where is Ayhan based?

Ayhan is based in Cologne, Germany.

What languages does Ayhan speak?

Ayhan speaks the following languages: Turkish (Native), English (Advanced), German (Intermediate).

How many years of experience does Ayhan have?

Ayhan has at least 9 years of experience. During this time, Ayhan has worked in at least 7 different roles and for 8 different companies. The average length of individual experience is 1 year and 2 months. Note that Ayhan may not have shared all experience and actually has more experience.

What roles would Ayhan be best suited for?

Based on recent experience, Ayhan would be well-suited for roles such as: Senior QA Engineer / Test Automation Engineer / SDET, Senior Software Tester for iOS and Android Application, Test Automation Engineer.

What is Ayhan's latest experience?

Ayhan's most recent position is Senior QA Engineer / Test Automation Engineer / SDET at Rewe digital.

What companies has Ayhan worked for in recent years?

In recent years, Ayhan has worked for Rewe digital, Pharma mall GmbH, BWI GmbH, IT-Gesundheitsdienstleister aus Berlin, and Innenausbau mai&wand GmbH.

Which industries is Ayhan most experienced in?

Ayhan is most experienced in industries like Information Technology, Pharmaceutical, and Retail. Ayhan also has some experience in Healthcare and Construction.

Which business areas is Ayhan most experienced in?

Ayhan is most experienced in business areas like Quality Assurance, Information Technology, and Product Development.

Which industries has Ayhan worked in recently?

Ayhan has recently worked in industries like Pharmaceutical, Retail, and Information Technology.

Which business areas has Ayhan worked in recently?

Ayhan has recently worked in business areas like Quality Assurance, Information Technology, and Product Development.

What is Ayhan's education?

Ayhan holds a Master in Software Engineering from Technische Hochschule Köln and a Bachelor in Computer Science from Technische Hochschule Köln.

What is the availability of Ayhan?

Ayhan will be available full-time from April 2026.

What is the rate of Ayhan?

Ayhan's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.