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Michael HoelzerMH

Michael Hoelzer

MANUAL TESTER | ISTQB | ELECTRICAL ENGINEERING

€500/day
Sofia, BG
3-7 years

Average response time: 1 hour

About Michael

ISTQB-certified manual hardware and software tester with over 20 years of in-depth electrical engineering expertise and a proven track record in systematic testing of complex technical systems. Specialises in end-to-end testing, system testing and mobile application testing.

CORE COMPETENCIES TESTING & QUALITY ASSURANCE:

🏆 ISTQB Foundation Level Certification - International standards in test methodology
📱 Manual mobile app testing - Android/iOS applications (commissioning and monitoring tools)
🔧 End-to-end testing – Complete system validation from hardware to user experience
⚙️ System testing – Battery storage, heat pumps, fuel cell systems
🤖 Test automation – Robot Framework for recurring test cycles
📊 Test tools – Polarion ASM, Jira, Confluence for professional test documentation


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ISTQB-zertifizierter manueller Hard- und Softwaretester mit über 20 Jahren fundierter Elektrotechnik-Expertise und nachgewiesener Erfolgsbilanz in systematischen Testverfahren komplexer technischer Systeme. Spezialisiert auf End-to-End-Testing, Systemtests und mobile Anwendungstests.

KERNKOMPETENZEN TESTING & QUALITÄTSSICHERUNG:

🏆 ISTQB Foundation Level Zertifizierung - Internationale Standards in Testmethodik
📱 Manuelles Mobile App Testing - Android/iOS Anwendungen (Commissioning and monitoring tools)
🔧 End-to-End-Testing - Komplette Systemvalidierung von der Hardware bis zur User-Experience
⚙️ Systemtests - Batteriespeicher, Wärmepumpen, Brennstoffzellensysteme
🤖 Testautomatisierung - Robot Framework für wiederkehrende Testzyklen
📊 Test-Tools - Polarion ASM, Jira, Confluence für professionelle Testdokumentation
  • German

    Native or bilingual

  • English

    Conversational

  • Bulgarian

    Basic

Remote only
Primarily works remotely

Experience

  • Viessmann Holding International GmbH
    Manueller Tester für Batteriespeicher, Wärmepumpen, Brennstoffzellenheizungen und Lüftungsgeräte
    ENERGY AND UTILITIES
    March 2021 - June 2025 (4 years and 3 months)
    Allendorf, Germany
    End2End- und Systemtests an Batteriespeicher Wärmepumpen, Brennstoffzellen und Lüftungsgeräte. Testen von Apps und Webapplikationen (commissioning and monitoring apps)
    Batteriespeicher Wärmepumpen End2End-Tests Manual Testing Brennstoffzellen

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Education

  • ISTQB Certified Tester Foundation Level
    ISTQB Certified Tester Foundation Level
  • Staatlich geprüfter Techniker
    Balthasar-Neumann-Schule I
    2003
    Staatlich geprüfter Techniker

Skill set

Categories