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Ayhan Gezer

Senior QA Engineer / Test Automation Engineer / SDET

Ayhan Gezer
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Cologne, Germany

Experience

Jan 2025 - Present
1 year 3 months
Cologne, Germany
Remote

Senior QA Engineer / Test Automation Engineer / SDET

Rewe digital

Expertise details
Position Summary
Senior QA Engineer / Test Automation Engineer / SDET at Rewe digital
Industries
Retail
Business Areas
Information Technology
Product Development
Quality Assurance

Consulting, planning, and implementing the software testing lifecycle for multiple Android apps and backends Introducing test automation with Appium, SpringBootTest, and RestAssured Setting up and managing emulators Developing an E2E library, an integration library, a Testcontainers library, and other libraries Designing, deploying, and advising on CI strategies Building the test environment with Testcontainers and virtualization Developing and implementing test cases for integration and end-to-end testing Building a maintainable test architecture with low entry barriers for easy creation of automated tests Some of the 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

Expertise details
Position Summary
Senior QA Engineer / Test Automation Engineer / SDET at Pharma mall GmbH
Industries
Pharmaceutical
Business Areas
Information Technology
Quality Assurance
  • Consulting, designing, and implementing the software testing lifecycle for the microservice architecture.
  • Ensuring automated tests are seamlessly integrated into the test strategy and work reliably.
  • Continuously optimizing processes in 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 testing, contract testing, end-to-end tests, and load tests.
  • Setting up and managing test environments using Testcontainers.
  • 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 microservice quality.
  • Streamlining and speeding up test processes with service virtualization and contract testing.
  • Building a stable and scalable test environment that accelerated development cycles.
  • Strengthening internal expertise through training and process improvements.
  • 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

Expertise details
Position Summary
Senior Software Tester for iOS and Android Application at BWI GmbH
Industries
Information Technology
Business Areas
Information Technology
Quality Assurance
  • Comprehensive consulting, planning, 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 a criteria catalog and analyzing different 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 using 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

Expertise details
Position Summary
Test Automation Engineer at IT-Gesundheitsdienstleister aus Berlin
Industries
Healthcare
Information Technology
Business Areas
Quality Assurance
  • Developing and implementing automated end-to-end tests to validate entire user journeys.
  • Executing 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 quality and reliability of the web application under heavy load.
  • Increasing test coverage and reducing manual testing efforts.
  • 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

Expertise details
Position Summary
Test Automation Engineer for an Android Application at Innenausbau mai&wand GmbH
Industries
Construction
Business Areas
Quality Assurance
  • Developing and implementing integration tests and end-to-end tests to validate app functionalities.
  • Ensuring quality standards and requirements are met through automated test runs.
  • Collaborating with the development team to identify and fix vulnerabilities.
  • Reducing production issues by identifying and resolving problems early.
  • Improving app stability and user experience through thorough integration testing.
  • 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

Expertise details
Position Summary
Lead Developer and QA Engineer for a service marketplace app at Helpmade GmbH
Industries
Information Technology
Business Areas
Information Technology
Product Development
Quality Assurance
  • Built the software development and QA infrastructure from the ground up.
  • Designed and developed the mobile app (Android and iOS) for a private service marketplace.
  • Developed the Android app with Java and a REST API based 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 carried out 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 bug rates 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

Expertise details
Position Summary
Lead Software Developer for an Internal Android App at Praevencio GmbH
Industries
Information Technology
Business Areas
Information Technology
Product Development
Quality Assurance
  • Analyzed business processes to identify optimization opportunities and digitalization needs.
  • Developed an internal Android app to digitize participant certificates, participant management, order processing, and cross-location collaboration.
  • Set up a relational database (MySQL), load balancer, and web server with AWS Elastic Beanstalk.
  • Developed a scalable REST API using Java Spring Boot.
  • Implemented and executed unit and integration tests to ensure stability and quality.
  • Successfully launched the app, boosting efficiency in administrative processes.
  • Simplified and sped up cross-location tasks through digitalization.
  • 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

Expertise details
Position Summary
Software Developer and QA Engineer at Veniture GmbH
Industries
Information Technology
Business Areas
Product Development
Quality Assurance
  • Developed and customized Jira and Confluence applications to extend functionality.
  • Built and trained a QA team for successful integration into software testing processes.
  • Implemented and ran integration tests and end-to-end tests for the developed applications.
  • Performed 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 capabilities.
  • 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
Profile match chart

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
Profile match chart

Summary

Experienced QA Engineer and Test Automation Engineer with in-depth expertise in microservices, test automation, and agile software development. Passionate about building custom automation solutions to streamline test processes and ensure lasting 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 Testing
  • End-to-end Testing
  • Regression Testing
  • 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. in Computer Science · Computer Science · Cologne, Germany

Technische Hochschule Köln

M.Sc. in 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
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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.

How to hire Ayhan?

To hire Ayhan, click the Meet button on the profile to request a meeting and discuss your project needs.

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Market avg: 750-910 €
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