Start September 2026 | Available 60–100% | Duration: 5-6 months | Rotterdam, The Netherlands

AI Marketing Intern

About Crystalloids

At Crystalloids, we’ve been helping businesses grow and innovate since 2006. Our team of passionate software and data specialists is dedicated to building smart, data-driven solutions that make a real difference. As a Premier Google Cloud Partner, we use the latest technology to help our customers solve challenges and unlock new opportunities.

We believe that the foundation for a successful solution is based on three dimensions: the people, the processes and the technology. By keeping these in balance, we create solutions that are not just effective but built to last.

Key Responsibilities

  • Use AI tools to brainstorm, draft, and refine content while ensuring everything remains authentic to our brand voice.
  • Craft high-impact content for social media LinkedIn that drives engagement.
  • Draft engaging blog posts and articles that provide genuine value to our specific B2B personas.
  • Design and assemble monthly newsletters
  • Assist in the end-to-end execution of marketing campaigns designed to generate demand and grow our audience.
  • Monitor performance metrics, report on campaign success, and analyze data to optimize our future strategy.

Requirements

  • Currently enrolled in a university where this internship is a mandatory part of your degree.
  • To be eligible, you must meet one of the following:
    • Reside in the EU/EEA or Switzerland.
    • Hold a valid residence permit allowing you to work in the Netherlands.
    • Be part of the Erasmus program.
    • Hold a Dutch study visa with a signed internship agreement between the educational institution, employer, and yourself.
  • You are available for 60–100% of the work week.
  • Strong communication skills in English
  • A passion for content creation and the ability to learn fast and navigate a niche B2B space.
  • Proactive Mindset, you don’t wait for instructions, you spot opportunities and take initiative.
  • Great social skills and a positive energy; you enjoy collaborating and being around a team.

What We Offer

  • A monthly internship allowance/expense reimbursement of €350,- net per month.
  • A laptop to ensure you can hit the ground running.
  • Dedicated vacation days for interns, depending on the duration of the stage.
  • Close collaboration with our Marketing Manager for high-value, hands-on experience.
  • Be part of an international team at our vibrant Rotterdam office.
  • Monthly lunches, quarterly team-buildings, and a social atmosphere stocked with snacks and drinks.

Interested?

Ready to build the future of our brand? Apply below or send your CV directly to recruitment@crystalloids.com.

Kacper

Kacper, software development trainee

“I chose Crystalloids to learn more about Cloud Engineering. During my traineeship, I had a chance to work on multiple projects ranging from writing an API to automating the whole hiring stream. I became proficient in many GCP services, Terraform, Apache Airflow and much more."

Apply here