Mechanical Engineer - Energy Storage Systems

Lyten, Inc.; Województwo pomorskie; Hybrid; PLN 120,000 - 180,000; Full time

Job summary

Lyten, Inc. in Poland is seeking a Mechanical Engineer to lead mechanical development of Li-ion battery systems for grid-scale and commercial energy storage. You’ll design modules, packs, racks, frames, and enclosures while collaborating with cross‑functional teams in Poland and Sweden.

The role requires a bachelor’s or master’s in mechanical engineering, 2+ years of design experience, strong CAD skills, and excellent English. Prior startup experience is a plus in Lyten’s fast-moving environment.

Qualifications

• Bachelor’s or Master’s degree in Mechanical Engineering or related field.
• Minimum 2 years of mechanical design experience in Li‑ion battery systems.
• Experience with mechanical joining methods.
• Strong hands-on CAD experience.
• Excellent written and spoken English.
• Experience in international teams and startup environments advantageous.

Responsibilities

• Develop mechanical design of Li‑ion battery modules, packs, racks, frames, and enclosures.
• Interact with customers to capture use cases and requirements.
• Brainstorm and develop concepts with cross-functional teams.
• Perform design for loads, vibrations, and structural integrity.
• Design protective enclosures against environmental impacts.
• Apply cost optimization and DFM principles.
• Participate in Design FMEA sessions.
• Prepare detailed technical drawings for customers and manufacturing.

Skills

CAD tools

Mechanical design

DFM

FMEA

English

Education

Bachelor’s or Master’s in Mechanical Engineering

Tools

SolidWorks

ANSYS

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 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 2 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.

Founded in 2015 in Silicon Valley, California, Lyten is transforming the future of energy and materials innovation to build a stronger, more resilient world. Our breakthrough innovation, Lyten 3D Graphene™, is a brand‑new supermaterial that enables the creation of products that perform better and cost less. Lyten is rapidly scaling operations across the U.S. and Europe. Our lithium–sulfur (Li‑S) batteries—free from nickel, manganese, cobalt, and graphite—deliver higher energy density and lighter weight while enabling a more secure, independent supply chain and a next‑generation alternative to traditional lithium‑ion chemistry. The acquisition of Northvolt’s assets in California, Poland, Sweden, and Germany has established a strong foundation for Lyten’s global energy storage growth, including Europe’s largest Battery Energy Storage System (BESS) manufacturing facility. Beyond battery systems, Lyten’s platform technology extends to high‑performance concrete admixtures, advanced composites, adhesives, and sensors, redefining material performance across industries from automotive and aerospace to construction and defense.

Lyten has raised over $625million in equity and received support from the U.S. Export‑Import Bank to provide up to $650million in financing for international customer energy storage projects. Recognized as one of Fast Company’s “Most Innovative Energy Companies,” one of TIME’s “Top Green Technology Companies,” and a Silicon Valley Defense Group Top 100 National Security Company, Lyten is leading the next wave of high‑performance materials and energy systems that enhance energy security and supply chain resilience. Our lithium–sulfur batteries have been selected to power Chrysler’s Halcyon Concept EV. Behind every Lyten innovation is a world‑class team of scientists, engineers, and business leaders from some of the most respected technology, energy, and manufacturing companies — all united by a shared mission to make a lasting global impact. We’re entering an exciting growth phase — expanding production, launching new products, and hiring exceptional talent across engineering, operations, manufacturing, and commercialization. If you’re ready to shape the next era of advanced materials and product innovation — while working alongside some of the brightest minds in science and engineering — join Lyten and help us build the next industrial revolution.