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Polarium Solna Full time

Back-end Developer

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.

We are looking for a Back-End Developer to join our newly formed Digital Engineering Team. This means becoming part of a small, dynamic and fast paced team. As a Back-End Developer in our team you will get the opportunity to work with a high impact project within the energy field. The code you implement will be released to hardware and clients throughout the world in a continuous and agile manner.

The Digital Team is responsible for our connected platform, building solutions for energy optimization, asset management, anti-theft, field service and more.

We work with a modern technology stack running in AWS that includes Kubernetes, PostgreSQL, RabbitMQ, IoT Core, Terraform, GitLab and more.


    • Develop backend systems and API´s for our platform
    • Developing modularized design blocks with re-use capabilities
    • Build solutions with quality, security, availability and scalability in mind
    • Participate in pre-studies of new projects, technologies and product areas
    • Support internal and external stakeholders with expertise within the area

    Qualifications and experience

    • Strong backend skillset using python or similar
    • Experience in developing services in the cloud, preferably AWS
    • Know how to use git and workflows common with GitLab
    • Experience using RabbitMq or similar
    • MSc or BA degree in relevant field
    • Excellent communication skills, fluent in English, both spoken and written
    • Bonus if you have experience in using IaC tolls like terraform, terragrunt, ansible or similar
    • Bonus if you have experience in using AWS IoT or similar

    About you

    • You are passionate and pragmatic with a genuine technical interest
    • You are detail-oriented, and you see the whole picture
    • You have a minimum of 3 years’ experience from similar positions
    • Knowledge from agile development
    • You are a team player

    We offer

    • Generous bonus system
    • Maximized wellness contribution
    • Five extra flexibility days
    • Pension and health insurance

    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!

    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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