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Polarium Solna Full time

Senior System Design Engineer, Energy Storage Systems

About the job

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 in Stockholm and Solna

Position: Permanent, full-time


  • System engineer for Energy Systems
    • Batteries, 48-1500 VDC
    • Power conversion, PCS and Inverters
    • Controllers
    • Site system solution and products
    • National requirements such as Grid compliance
  • As System Engineer your responsibility includes
    • Risk assessment
    • Product requirements
    • Test requirements
    • System descriptions
    • Certification strategy and documentation
    • Interfaces
    • Sales support

Qualifications and experience:

  • Minimum 5 years of documented experience in the following areas:
    • Development or management of hardware with a focus on energy storage and energy optimization systems.
    • In-depth knowledge of functional and test requirements specific to energy optimization technologies.
    • Familiarity with switchgear and power conversion, including adherence to grid code standards and regulations.
    • Battery technology, including relevant standards and regulations.
  • Good communication skills and Convenient to manage external contacts.
  • Highly driven, pro-active and enjoy fast growing corporate environment.
  • Ability to comprehend and effectively express complex ideas in English.
  • Willing to travel from time-to-time.

Join our team and enjoy our comprehensive benefits package, which includes private health insurance, a generous wellness allowance, a flexible parental leave policy, and the opportunity for hybrid working. We believe in inclusivity and want to ensure that our employees have access to benefits that support their well-being and work-life balance.

Kindly submit your application through the provided link in the advertisement via our careers page, as we are unable to accept any applications via email in compliance with the GDPR regulations.

About Polarium

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!

    Om företaget
    Building a Sustainable Future Together

    We are a Swedish company dedicated to providing the best-performing, safe, and sustainable energy storage solutions built on lithium-ion technology. Today, our market-leading solutions are in use on all continents and in all climate zones. We ensure that the flow of energy never stops, while enabling our customers to reduce their energy costs and carbon footprint. 

    Do you share our vision for a smart and sustainable future? Join our team!

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