Mechanical Design Engineer

We're looking for a Mechanical Design Engineer who loves solving real engineering challenges in a top notch power electronics product.

In this role, you'll own the mechanical design and integration of our modular multilevel inverter product, developing clever, space-efficient, and cost-effective solutions that make our hardware robust and production-ready. You'll collaborate closely with our electrical and system engineers from early concept to final prototype - iterating fast, testing ideas, and learning from every build.

If you're someone who thinks with your hands as much as with your head, enjoys figuring out how things fit together, and thrives in a dynamic R&D environment - we'd love to meet you.

• Design, prototype, and refine mechanical parts and assemblies for our electronic products
• Work closely with electrical and system engineers to ensure mechanical and electronic designs integrate seamlessly
• Develop thermal management solutions for high-power systems - balancing performance, cost, and compactness
• Build and test prototypes, analyze results, and iterate rapidly based on feedback and data
• Collaborate with manufacturing partners to prepare designs for scalable, cost-effective production
• Document insights, share lessons learned, and contribute to improving our design process and standards

• Degree in Mechanical Engineering, Mechatronics, or related field
• 2-5 years of experience in mechanical design for electronics or electro-mechanical products
• Strong skills in CAD (e.g., SolidWorks, Creo, or similar) and familiarity with thermal simulation tools
• Experience with thermal design principles, heat sinks, and cooling methods (passive or active)
• Hands-on mindset - you feel comfortable building, testing, and iterating
• Knowledge of manufacturing processes and DFM principles
• Experience with rapid prototyping, electronics packaging, or hardware startups is considered a plus
• A team player who enjoys working in cross-functional setups
• A reflective problem-solver - you learn from every prototype and aren't afraid to challenge assumptions
• You're energized by ambiguity and enjoy turning early ideas into solid, testable designs

We make energy storage stable and secure the future of energy. As technological pioneers, we develop storage solutions that extend battery life cycles and encourage the sustainable use of resources. Our approach is simple: we never recycle a battery too soon. STABL Energy is more than just a traditional start-up company. Ready to be part of us, innovate, impact, and inspire?

STABL Energy is one of the most innovative start-ups in the energy transition, ees Award winner 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.