ESS - Hardware Validation and Compliance Engineer

Permanent employee, Full-time · Diemen

Your mission

We are seeking a Hardware Validation and Compliance Engineer to lead the complete testing and certification strategy for our Battery Energy Storage Systems.

This is a critical role at the juncture of multiple domains that will define and execute comprehensive validation campaigns, manage relationships with third-party testing laboratories, and ensure our products meet all applicable safety, performance, and regulatory standards across multiple markets.

You will be the technical owner of our compliance roadmap, working cross-functionally with hardware, electrical, mechanical, and software engineering teams to translate product requirements into test specifications, oversee execution, and drive certification to completion. Your work will be essential to bringing our innovative sodium-ion BESS technology to utility-scale deployments worldwide.

What you will do

Develop and maintain the product compliance roadmap for target markets. Stay up-to-date with evolving industry regulations and standards, and proactively adapt the compliance plan as needed.
Identify, qualify, and manage relationships with third-party testing laboratories (UL, TÜV, Intertek, CSA, etc.).
Define and execute comprehensive hardware validation test plans covering electrical safety, performance, environmental, EMC/EMI, thermal, mechanical, and reliability testing.
Work closely with hardware, electrical, and mechanical engineering teams to ensure designs are optimized for testability and compliance. Interface with supply chain and manufacturing to ensure component and production compliance. Collaborate cross-functionally to align testing and compliance timelines with Moonwatt’s roadmap.
Develop detailed test specifications, procedures, and acceptance criteria aligned with product requirements and applicable standards. Coordinate and oversee testing campaigns at internal facilities and external accredited laboratories. Travel to site as needed to oversee testing and build relationships.
Analyze test results, identify root causes of failures, and work with engineering teams to improve designs and solve issues.
Create and maintain validation and compliance documentation packages for customer submissions and regulatory filings
Be the main point of contact for compliance, both internally but also externally towards testing laboratories, authorities having jurisdiction, and customers.

Your profile

Must-have Qualifications

Education: Bachelor's or Master's degree in Electrical Engineering, Mechanical Engineering, or related technical field
Experience: 5+ years of experience in hardware validation, testing, and/or compliance engineering for electrical or electronic products
Standards Knowledge: Familiarity with electrical safety and performance standards, particularly with battery standards such as UL1973, UL9540, IEC 62619, UN38.3, NFPA 855, etc.
Testing Expertise: Hands-on experience developing test plans, executing tests (electrical safety, EMC, environmental, performance), and analyzing results
Laboratory Experience: Track record working with accredited third-party testing laboratories and managing certification projects
Technical Skills: Strong understanding of electrical systems, power electronics, battery technologies, and energy storage system architectures
Project Management: Ability to manage multiple concurrent projects with competing priorities, budgets, and timelines
Communication: Excellent written and verbal communication skills; ability to present complex technical information to diverse audiences
Language: Fluent in English (written and spoken).
Willingness to travel internationally (approximately 30%) for testing campaigns and site visits

Nice-to-have qualifications

Experience with battery energy storage systems (BESS), battery management systems (BMS), or power conversion systems (PCS/inverters)

Familiarity with utility-scale energy storage applications and grid interconnection requirements
Hands-on experience of fire safety testing including UL9540A thermal runaway propagation testing
Experience working in startup or fast-paced product development environments
Chinese-speaking is a plus.

Why us?

Be part of a fast-growing startup delivering next-generation clean energy technology.
Work on high-impact projects alongside experienced engineers across the EU.
Competitive salary, benefits, and opportunities for growth in the energy tech sector.

WE PARTICULARLY ENCOURAGE WOMEN AND INDIVIDUALS FROM UNDERREPRESENTED BACKGROUNDS TO APPLY EVEN IF YOU DON'T MEET 100% OF THE LISTED QUALIFICATIONS. POTENTIAL AND MOTIVATION MATTERS AS MUCH AS EXPERIENCE.

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About us

Moonwatt is developing the next generation of highly competitive Energy Storage Systems utilizing advanced sodium-ion battery technology. Our hardware and software solutions are optimized for co-location with solar power plants, enabling them to completely replace fossil-fuel power generation on the world’s power grids. We are seeking talented individuals across all areas whether you are in engineering, marketing, design, project management, HR, or finance. Join our team push the boundaries of innovation. If you are driven by the desire to create change, tackle big challenges, and make a meaningful impact, we’d love to have you onboard!

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