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B2B Product Marketing Internship

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Job Description

Do you want to contribute to a more sustainable world? Are you excited to help shape the future of battery technology and consequently the future of consumer electronics and mobility? Can you not wait to dive into a VC-backed deep tech scale-up with the ambition to change the world?

We are looking for an enthusiastic B2B Product Marketing Internshipto join our innovative and ambitious organization. To start on 01-04-2024.


About LeydenJar

LeydenJar is a high-tech company, developing pure silicone anodes for a lithium-ion battery that will change the world. We are proud that, here at LeydenJar, we:

  • boost Li-ion battery energy density by 70% by using 10x thinner anodes
  • improved cycle life to >450
  • achieved fast charging to 60% in under 10 min!

We are currently still in an R&D phase, but we are ready to start the actual production of anode foil. LeydenJar Plant One will open in 2026.


We are looking for a dedicated B2B Product Marketing Intern to support our team.


You are eager to learn and excited to work with us to make better batteries. You will work close together with technicians, battery engineers, production process engineers and other departments . You will report to Business Developer. You will be part of a young, international, ambitious and diverse team that is determined to make a better world with cleaner energy.


It is a full-time position and working from home is not possible. You will mainly be working in Leiden, and may occasionally work in Eindhoven.


You will be responsible for:

  • Conduct market research to identify trends, competitive landscape, and customer needs in the battery industry.
  • Analyze data to provide insights for product development and marketing strategies.
  • Assist in the development of new battery products by collaborating with cross-functional teams including engineering, manufacturing, and sales. Provide input on product features, specifications, and pricing based on market research and customer feedback.
  • Support the creation and execution of marketing campaigns to promote our battery products. This includes content creation for social media, website, and marketing materials
  • Assist in managing digital marketing channels such as email marketing, advertising, and social media ads
  • Engage with customers through various channels to gather feedback, address inquiries, and build relationships.
  • If necessary, we may require you to perform activities normally undertaken by others or to take on additional activities.

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  3. We'll reach out if there's a company interested in talking to you.