System Design Engineer
We develop and manufacture turnkey energy storage solutions, based on lithium-ion battery technology. Our goal is to engineer technology that both stores and optimizes energy as we shift towards more efficient energy usage and renewable energy sources on a global scale. You’ll have the opportunity to work with exceptional engineers, scientists, developers and more to pave the way for the next big leap in the energy industry through our battery energy storage and optimization systems.
Location: Polarium HQ (Stockholm) and Tomteboda (Solna).
Main Responsibilities:
As a System Engineer, your responsibilities will include:
· Designing technical solutions that integrate both hardware and software components
· Documenting, analyzing, and tracing requirements from customers, standards, and internal stakeholders
· Leading or supporting certification efforts (e.g. CE, UL, EMC, safety), including preparation of technical documentation
· Writing and reviewing technical documentation such as product requirements, test specifications, system descriptions, and user manuals
· Conducting risk assessments
· Developing certification strategies and corresponding documentation
Qualifications and Experience
· Master’s or Bachelor’s degree in a relevant engineering field
· Strong communication skills and ability to manage external contacts with confidence
· Ability to act independently and determine methods and procedures for new or unique assignments
· Proactive and highly motivated, with a strong sense of ownership
· Ability to comprehend and clearly communicate complex ideas in English
· Capacity to maintain a holistic perspective while remaining attentive to detail
· Structured and analytical mindset
· Self-motivated with strong collaboration abilities
· Willingness to travel occasionally
· Fluent in both English and Swedish, written and spoken
Kindly submit your application through the provided apply button in the advertisement on our careers page, as we are unable to accept any applications via email in compliance with the GDPR regulations.
At Polarium, creating change in the energy industry starts with our team. We believe a diverse workplace brings creativity, innovation and better represents our customers, and the many communities they serve, around the world. A positive work-life balance is what supercharges our teamwork and a sustainable personal journey throughout our careers.
Since Polarium launched in 2015, we’ve been on a mission to redesign the energy industry. We’re unlocking the massive potential of energy storage systems through our wide range of intelligent and digital services. Our passion for solving challenges is what drives our next generation of premium energy storage products in use on all continents and in all climate zones. Today, we power businesses, optimize energy usage, and reduce carbon dioxide emissions to create a cleaner future in energy.
We look forward to receiving your application!
- Department
- Research & Development
- Locations
- Stockholm
- Remote status
- Hybrid
- Employment type
- Full-time

Stockholm
People of Polarium
We have an open and dynamic culture where everybody can make a difference and contribute to the success of the company.
About Polarium
We are an impact business contributing to the sustainable energy transformation by enabling renewables, electrification and intermittent power supply. Our cutting-edge and easily adaptable modular battery technology enables us to be in the forefront of developing state-of-the-art sustainable energy storage and optimization solutions for today - and tomorrow. Polarium is headquartered in Stockholm, with production in South Africa and Vietnam and customers across the world.
System Design Engineer
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