Test Engineer

Job Description

Hyperscale Power is building the power backbone for the AI data center era: a complete power conversion chain from 13.8kV-35kV medium-voltage AC down to 800V DC, combining ultra-compact SiC-based AC/DC and DC/DC power blocks. Rigorous testing is what turns a promising prototype into a product our customers can trust - and what gets us from validated prototype to Alpha customer readiness to volume shipments.

As Test Engineer, you will design and execute test plans for our power conversion systems - from functional and target-parameter verification through stability, endurance and load testing. You will build and maintain the test setups that validate our hardware and firmware, and work closely with Power Electronics, Firmware, EMC/Compliance and Mechanical engineers to track down and resolve issues.

It is a unique opportunity to shape the test strategy of a breakthrough power electronics platform from an early stage - with direct visibility to the CTO and engineering leadership.

Key Responsibilities

• Design and execute test plans for our AC/DC and DC/DC power conversion systems - functional tests, stability tests, endurance (soak) tests, and load tests.
• Build and maintain test setups for prototype, pilot and production units, including medium-voltage test benches.
• Support prototype validation and target-parameter verification (form factor, efficiency, stability) for our Prototype milestone.
• Support qualification testing for Alpha customer deployments - full target-parameter verification, certification test support, and release tests for volume delivery.
• Develop test automation scripts and tools to increase test coverage and reduce manual test effort.
• Collaborate with the Power Electronics, Firmware, EMC/Compliance and Mechanical teams to diagnose and root-cause test failures.
• Document test procedures, results and reports; maintain traceability for certification and quality purposes.
• Support the definition and specification of end-of-line (EOL) test equipment for volume production, working with our EOL test equipment vendor.
• Support field testing and diagnostics for units deployed at customer sites as needed.

Qualifications

• BSc / MSc in electrical engineering, electronics engineer (Elektroniker EFZ), automation engineer (Automatiker EFZ) or comparable education.
• 3+ years of experience in test engineering, ideally for power electronics or medium-voltage systems.
• Experience with medium-voltage high-power test setups and lab safety protocols and practices.
• Familiarity with test automation and scripting (e.g. Python, LabVIEW or similar).
• Understanding of power electronics test methods (efficiency, thermal, load and stability testing).
• Strong documentation and analytical skills.
• Team player, comfortable working hands-on in the lab with cross-functional teams.
• Language skills: fluent in English, spoken and written; German language skills helpful, but not mandatory.
• The job will be located at our HQ in Egg b. Zürich, Switzerland.

Benefits

• Equity + competitive salary.
• Unique technology and market opportunity - validated prototype and first paying customers on the path to volume shipments.
• Hybrid work with flexible working times.