Jan Zinserling - Freelancer / Testautomation Engineer

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Reisbach, Germany

Experience

Dec 2024 - Jun 2025

7 months

Freelancer / Testautomation Engineer

Dentsply Sirona

As an extension of the existing test team, my task is to automate existing (manual) tests from XRay using Cucumber/Gherkin in Cypress.io.
The software is an enterprise application that needs to be tested on various medical devices.
Tech Stack: JavaScript, Cypress.io, Confluence, IntelliJ, XRay, JIRA, Confluence, Cucumber/Gherkin, Git

Jun 2024 - Dec 2024

7 months

Freelancer / Testautomation Engineer

DHL

In this project, we supported the shift from a decentralized to a centralized control of mail centers.
The main focus is automating interface/API tests to check regression during the transition.
Tech Stack: Java, Citrus, Cucumber, Confluence, IntelliJ, JIRA, Podman, Kafka, JSON

Aug 2023 - Jun 2025

1 year 11 months

Freelancer / Testautomation Engineer

GEMA

Developing a test automation strategy on top of existing test management for a music license management software.
The main focus is supporting releases (monitoring and analysis).
The test suite is gradually expanded based on existing manual test cases.
Tech Stack: JavaScript, Playwright, Confluence, GitHub Actions, IntelliJ, XRay, JIRA, Confluence, HTML/CSS

Dec 2022 - May 2023

6 months

Freelancer / Test Manager / Test Automation Engineer (Part-Time)

ubiLearning

At an e-learning startup, responsible for introducing software QA (manual/automated).
Test objects include various software components covering web-based as well as Android and iOS applications.
Tech Stack: JavaScript, Cypress.io + Cucumber, Appium, Confluence, GitHub, Kubernetes, IntelliJ, Microsoft Azure, JIRA, AWS, Zephyr, Katalon Studio, HTML/CSS

Feb 2022 - Nov 2022

10 months

Freelancer / Test Manager / Test Automation Engineer (Part-Time)

ZF Friedrichshafen

Responsible for software quality assurance during the development of an internal company portal at a German automotive supplier.
In a Scrum-driven development team, I was in charge of quality assurance for newly developed features.
I also managed defect management (creating defect tickets, coordinating with developers, and acceptance).
MicroFocus ALM was used for this.
The test cases I created were gradually automated with Playwright.
Tech Stack: JavaScript, Playwright, Confluence, MicroFocus ALM, GitLab, IntelliJ, JIRA, HTML/CSS

Nov 2021 - Mar 2024

2 years 5 months

Freelancer / Test Manager

Mercedes Benz AG

Responsible for software quality assurance during the development of a B2B shop at Mercedes Benz IO (test design, evaluating suitable test methods, manual and automated test cases).
As Senior Test Manager, I was part of a 3-person test team responsible for planning, executing, and analyzing all test levels.
I also coordinated and handled defect management (logging defects, coordinating with development, and acceptance of fixed defects).
The project was run with Scrum until early 2024, after which SAFe was introduced.
Tech Stack: JavaScript, Cypress.io, Kubernetes, Confluence, GitLab, IntelliJ, Zephyr, JIRA, SAP Hybris, SAP Solution Manager, Postman, JSON, HTML/CSS

Aug 2021 - Nov 2021

4 months

Freelancer / QA Software Developer

T-Systems MMS

Expanding and maintaining automated tests for an international fashion retailer.
Tech Stack: Java, Selenium, Confluence, GIT, JIRA, Jenkins

Aug 2017 - Aug 2021

4 years 1 month

QA Software Developer

Cartago

In my role, I set up test automation in the company. When I joined, there were only manual software tests and basic unit tests.
I independently designed and implemented the entire project in all phases. The automation covers all areas of front-end and back-end, as well as all phases from unit to integration and regression testing up to system tests.
My work is based on Selenium, SoapUI, and Katalon Studio. I ensure CI with Maven and Jenkins.
To make test automation broadly scalable, I use virtualization tools such as HyperV.
I also gained experience in mobile device testing with Appium in a separate project.
Tech Stack: GroovyScript, JIRA, AWS, Katalon Studio, HTML/CSS

Aug 2016 - Jul 2017

1 year

Java/Web Software Developer

DE Software & Control

My responsibilities were mainly in Java EE and Java Web technologies (HTML/CSS/JavaScript).
For the front end, I primarily worked with Vaadin as the standard framework.
Tools like Maven and Jenkins were also daily parts of my development work.
I gained experience with JavaScript APIs using jQuery and fabric.js.

Jun 2015 - Jul 2016

1 year 2 months

Web Developer

Kreativoli

As a working student, I independently handled support tasks in TYPO3 and Contao.
I also had increasing responsibility in several website relaunches.
Since May 2016, I have been working on my bachelor's thesis titled "Web-based application portal for participants in a major event". This covers topics like responsive web design, jQuery, JSON, AJAX, advanced form validation, as well as PHP and SQL.

Sep 2013 - Jun 2014

10 months

Working Student SAP ERP Development

T.CON

Starting as an intern during my practical semester, working in ERP development to create customer modules in SAP.
Later employed as a working student.

Sep 2001 - Aug 2013

12 years

Medical Sergeant

Bundeswehr

Responsible for medical care and training of soldiers on training grounds and in foreign missions.
In the missions, I served as a dispatcher in the casualty control center to coordinate rescue operations.
Completed service after a 12-year commitment as a Master Sergeant.

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