Your Role

We are seeking a highly motivated Systems Engineer (m/f/d) with a strong interest and capability in technical documentation, regulatory compliance and safety systems, to join our Battery Energy Storage System (BESS) product development team. This hybrid role bridges engineering in various fields with compliance and customer success by ensuring that our system designs not only perform but are also well-documented and compliant with international standards such as CE and other applicable directives especially german laws and standards.

Your mission

System Engineering

• Support the end-to-end system development of containerized BESS products, from concept to deployment.
• Collaborate cross-functionally with electrical, mechanical, software, and testing to ensure system integration.
• Perform design reviews and system-level testing validation.

Safety Systems Integration

• Take ownership of safety system design and documentation, including:
  • Fire detection (smoke, heat, aerosol suppression systems).
  • Gas detection (e.g., hydrogen, VOCs).
  • Explosion protection (e.g., venting strategies).
  • Emergency shutdown systems and HVAC/fire interlocks.
• Collaborate with suppliers and internal specialists to evaluate and select compliant safety components.
• Ensure that safety systems meet applicable regulatory and customer requirements.

Technical Documentation & Customer-Facing Documentation

• Develop and maintain technical documents, including risk assessments and test reports.
• Coordinate with external testing labs and notified bodies as required.
• Prepare high-quality, accurate documentation packages for customers (Fire load calculation, Static load documentation, Foundation requirements and load plans, etc.).
• Ensure that documentation aligns with regional building codes, standards, and customer-specific requirements.
• Regularly update documentation based on design changes and field feedback.

Your profile

• Degree in Systems Engineering, Mechanical/Electrical Engineering, or a related technical field.
• Minimum of 3 years of experience in system engineering within energy storage, renewable energy, or industrial automation sectors.
• Working knowledge of relevant EU directives/standards and german standards/regulatories for BESS.
• Experience preparing customer technical documentation.
• Familiarity with mechanical design constraints, structural loads, and fire safety principles in containerized systems.
• German language proficiency: C1 or native level is mandatory for documentation.

Nice to have

• Experience with BESS or related power electronics/inverter systems.
• Proficiency with CAD tools, system diagram software (EPLAN), testing and document management systems.

Why STABL Energy?

STABL Energy is one of the most innovative start-ups in the energy transition, ees Award winner 2022, pv magazine award winner 2025 and named a global Top100 Energy Start-up. We are funded by renowned and experienced Tech VCs from Germany, Denmark and Switzerland.

What you’ll love about working with us:

• Agile, open & innovation-driven culture with flat hierarchies, quick decision-making processes and real ownership
• Company pension scheme to support you plan for the future
• Flexible working hours, a hybrid work model, and the option to work remotely from abroad
• Digital meal vouchers with Circula Lunch - enjoy tasty lunches on us!
• Monthly benefit in kind to spend at your favourite stores
• Corporate benefits portal with exclusive employee discounts
• Regular team-building activities and team events
• Company EGYM Wellpass membership to train with no limits at numerous fitness clubs across Germany Ready to innovate, impact, and inspire? Apply Now!
  We’d love to hear from you to help us build the energy system of the future! Even if you don’t meet 100% of the requirements, we encourage you to apply anyway. Our motto is 'Hire for attitude, train for skills', so we value potential and lifelong learning just as much as experience.