Senior Mechanical Engineer - Energy Storage Systems

Lyten; Województwo pomorskie; On-site; PLN 180,000 - 300,000; Full time

Job summary

Lyten Poland Energy Storage Systems (BESS) seeks a Senior Mechanical Engineer to lead the mechanical development of Li-ion battery systems for grid-scale and commercial energy storage. You will design modules, packs, racks, frames, and enclosures, ensuring safety, reliability, and manufacturability.

You will collaborate with cross-functional teams in Poland and Sweden, suppliers, and customers to deliver high-performance energy storage systems that enable renewable integration and advanced power

Qualifications

• Bachelor’s or Master’s degree in Mechanical Engineering.
• Minimum 5 years of mechanical design experience with Li-ion battery systems.
• Experience with various mechanical joining methods.
• Excellent written and spoken English.

Responsibilities

• Take responsibility for the mechanical development of Li-ion battery systems, including modules, packs, racks, frames, and enclosures.
• Interact with customers to understand product use cases and technical requirements throughout the project lifecycle.
• Brainstorm and develop early product concepts with cross-functional teams.
• Perform mechanical design considering loads, vibrations, and structural integrity.
• Design protective enclosures to ensure resistance to environmental impacts.

Skills

CAD tools

Mechanical design

English proficiency

Cross-functional collaboration

Problem solving

Education

Mechanical Engineering degree

Tools

CAD tools

Job description

Lyten is leading an industrial revolution through Lyten 3D Graphene™, a breakthrough supermaterial unlocking a new generation of products - from lithium-sulfur batteries and energy storage systems to concrete admixtures, lightweight composites, and next-generation sensors that are revolutionizing industries. Together, these innovations are making a massive global improvement and driving real-world impact across energy, mobility, construction, and defense.

At Lyten, we believe the most meaningful careers begin with purpose - and with people who want to make a difference. We’re not just developing advanced supermaterials - we’re about to change the world as we know it, reshaping how energy is stored, how products are built, and how progress is made.

We’re entering an exciting growth phase, scaling production across the U.S. and Europe and expanding our team of engineers, scientists, and innovators.

As a Senior Mechanical Engineer in Lyten Poland Energy Storage Systems (BESS) team, you will be responsible for the mechanical development of cutting-edge battery solutions for grid-scale and commercial energy storage. This includes designing and optimizing battery modules, packs, racks, frames, and enclosures to ensure safety, reliability, and manufacturability.

You will work closely with cross-functional team located in Poland and Sweden, suppliers, and customers to deliver innovative, high-performance energy storage systems that enable the next generation of renewable energy integration and power management solutions.

Key Responsibilities

• Take responsibility for the mechanical development of Li-ion battery systems, including modules, packs, racks, frames, and enclosures.
• Interact with customers to understand product use cases and technical requirements throughout the entire project lifecycle.
• Brainstorm and develop early product concepts in collaboration with cross-functional teams.
• Perform mechanical design considering loads, vibrations, and structural integrity.
• Design protective enclosures to ensure resistance to environmental impacts and pollution.
• Apply DFM and cost optimization principles.
• Participate and actively contribute to Design FMEA sessions.
• Engage in regular technical discussions with internal teams and external suppliers.
• Create detailed technical drawings for customers and manufacturing.
• Participate in prototyping activities for newly designed and developed components.

What You Bring

• Bachelor’s or Master’s degree in Mechanical Engineering or a related field, or an equivalent combination of education and experience.
• Minimum 5 years of mechanical design experience, with exposure to cell integration, structural integration, power electronics, or high-performance Li-ion battery systems.
• Experience with various mechanical joining methods.
• Strong hands‑on experience with CAD tools.
• Excellent analytical skills, particularly in design for safety, manufacturability, and serviceability.
• Experience working with international teams and customers.
• Excellent written and spoken English.
• Experience in a start‑up or fast‑growing environment is a plus.
• Ability to work both independently and collaboratively within a team.

Specific Skills

• Ability to work under high pressure and tight deadlines with strong time‑management skills.
• Comfortable working in a high‑profile, fast‑paced international start‑up environment.
• Flexible, quality‑focused, and motivated to take on new challenges.
• Resilient, solution‑oriented, and able to maintain momentum under demanding conditions.
• A sense of humor is appreciated.

Personal Success Factors

• Strong communication skills and collaborative mindset.
• Innovative and creative problem‑solving approach.
• Highly organized and results‑driven.
• Passion for technology and solving complex engineering challenges.
• Demonstrates grit and determination in finding the best possible solutions.
• Entrepreneurial mindset with a strong "can-do" attitude.

Why Work at Lyten

At Lyten, you’ll be part of a team that’s redefining what’s possible in energy, materials, and manufacturing. We’re not just imagining the future — we’re building it today with breakthrough technologies that are changing how products are made and how industries innovate.

Our people are the heart of that mission. From world-class scientists and engineers to creative problem-solvers in operations, manufacturing, and commercialization, every member of the Lyten team plays a role in turning bold ideas into real‑world impact. We believe that the best work happens when you’re doing great things in the world — with people you like. Collaboration, curiosity, and a shared sense of purpose drive everything we do.

What You’ll Find at Lyten

• A mission that matters: Contribute directly to solving complex challenges in energy, mobility, and materials innovation.
• Cutting‑edge innovation: Work on technologies at the intersection of materials science, energy storage, and advanced manufacturing that strengthen energy security and local supply chains.
• Extraordinary people: Join a team of talented, friendly, and down‑to‑earth innovators who support, challenge, and inspire one another every day.
• Teamwork and culture: Experience a workplace built on trust, respect, and shared success — where collaboration fuels breakthroughs and everyone’s ideas are heard.
• Global impact: Help scale new materials and energy solutions that reinforce industrial resilience across the U.S. and Europe.
• Career growth: Be part of a fast‑moving company entering a commercial growth phase, with opportunities to lead, learn, and make your mark.
• Purpose‑driven values: Thrive in an environment that celebrates ingenuity, optimism, and meaningful progress — together.

Lyten offers the opportunity to do the most important work of your career — helping build the technologies that will power the next century of innovation.

Join us, and help transform industries, communities, and the planet with friends who share your drive to make a difference.