Zertificon Solutions GmbH logo

Sr. Python Test Automation Engineer (f/m/d) at an established IT-Security Company

Zertificon Solutions GmbH • Berlin, Berlin, Germany

onsitefull-time
Posted Oct 1, 2026Apply by Oct 31, 2026
  • Role & seniority

    • Senior Test Automation Engineer (software testing/QA), ~5+ years experience
  • Stack/tools

    • Automation: Selenium, Cucumber, Playwright

    • Languages/OS: Python, Linux, shell scripting

    • DevOps: Docker (hands-on)

    • QA methods: ISTQB (test specification/management; certification preferred)

    • (Nice) TestRail

  • Top 3 responsibilities

    • Design, develop, and execute automated test suites; perform error analysis and document results

    • Improve/maintain test coverage incrementally for existing features and in parallel with new features

    • Coordinate with developers to identify/report defects and ensure quick resolution; use manual testing when automation is insufficient

  • Must-have skills

    • 5+ years as a Software Test Engineer in an agile environment

    • Strong ISTQB test specification and management expertise (ideally certified)

    • Advanced test automation techniques and frameworks experience (Selenium/Cucumber/Playwright)

    • Proficiency in Python, Linux, and shell scripting

    • Hands-on Docker knowledge

    • Clear communication; excellent English

  • Nice-to-haves

    • Experience with test documentation/reporting tools like TestRail

    • German language skills

  • Location & work type

    • Neukölln, Berlin; hybrid with flexible hours and home office options

Full Description

Zertificon Solutions – Software Manufacturer since 2004.

We are IT security specialists: our products encrypt business communications. More than 25% of the 100 highest-revenue companies in Germany, as well as hundreds of medium-sized enterprises across all industries, already use our Z1 encryption solutions. We have big plans and continue to grow steadily. Nearly 140 employees are already working with us in Neukölln. Join our professional, highly qualified team: take on challenges, share your knowledge, learn new things, and discover your potential!

Your tasks

Join us as a Senior Test Automation Engineer and be the driving force behind a flawless software. Rapidly develop cutting-edge automation tests to elevate our test coverage, ensuring no regression slips through with every new feature release. Measure and enhance our software's performance regularly, and be the guardian of quality and excellence our customers deserve. Your expertise will be crucial in delivering robust, reliable solutions.

Design, develop, and execute cutting-edge automated software tests, complete with error analysis, assessments, and detailed documentation Ensure comprehensive test coverage by testing existing features incrementally and new features in parallel with implementation Step in with precise manual tests when automated testing isn't enough Collaborate closely with developers and fellow test engineers to devise and implement effective testing strategies Identify, report, and track defects, working hand-in-hand with development teams for swift resolution Generate clear and insightful test reports, metrics, and documentation to keep stakeholders informed and up-to-date Stay ahead of the curve with the latest trends, tools, and technologies in test automation and quality assurance

Dein Profil

Proven experience (min 5 years) as a Software Test Engineer in an agile software development environment Excellent skills in ISTQB test specification methods and management, ideally certified Strong experience in test automation methods with advanced techniques Knowledge of Selenium, Cucumber, and Playwright testing frameworks First hands-on experience working with Docker for containerization Proficiency in Python, Linux and shell scripting You have an open and clear communication style and excellent English skills

Nice to have

Hands-on experience with test documentation tools like TestRail Good German language skills

We offer

Flexible hours and home office options

Mobility: free Germany-wide public transport ticket, bike leasing, or parking Subsidies for meals (e.g., delivery services) and home office internet Urban Sports Club membership for flexible fitness and wellness

Office perks: rooftop terraces & green courtyard, organic fruit and drinks, personal packages accepted at the office

Get-togethers: monthly Pizza Friday, regular team events, big summer party

Responsible leadership: structured onboarding, regular feedback, clear goals

Innovative without startup risk: profitable for 20+ years, self-funded innovation with strong global potential

International team: 120+ colleagues from 30+ countries, open and collaborative culture

If that resonates with you, we’d love to hear from you.

Want to know more? Please have a look at our Work at Zertificon page: https://www.zertificon.com/en/it-jobs-berlin/work-at-zertificon

Questions? You can reach our HR team at jobs@zertificon.com

PythonSoftware Test AutomationTest DesignISTQBSeleniumCucumberPlaywrightDockerLinuxShell ScriptingManual TestingPerformance TestingDefect TrackingTest ReportingAgile Software DevelopmentEnglish Communicationmulti-location

Cookies & analytics consent

We serve candidates globally, so we only activate Google Tag Manager and other analytics after you opt in. This keeps us aligned with GDPR/UK DPA, ePrivacy, LGPD, and similar rules. Essential features still run without analytics cookies.

Read how we use data in our Privacy Policy and Terms of Service.