Founder’s Associate & Social Media Intern (m/f/d) at D2C Skincare Startup

Who are we?

belong. cosmetics is a 100% female-founded Clean Skincare Brand from Hamburg – developed for the most sensitive skin conditions. Vegan, hormone-free, Made in Germany, without fragrances, silicones, and anything the skin doesn't need. High Standards instead of empty promises, High-End Design instead of medical-looking tubes.

We launched at the end of May 2026 and are in the most exciting phase a startup can have: everything is growing, everything is moving, nothing is set in stone. That's exactly why we're looking for you now!

Responsibilities

Your Mission with us

There's no coffee to make here. You are the right-hand person to the founders. Your focus: together with us to ensure that our brand is unmissable in the digital space.

• Social Media Strategy & Content Creation: You will develop our channel and content strategy with us, analyze what performs, and test new formats. You will produce and edit creative content for TikTok, Instagram, and LinkedIn. You will write scripts, develop hooks, and have a feel for trends before they are trends. Whether for organic or paid content.
• Personal Branding of the Founders: You will support the personal image development of our founder Julia Kiener – especially on Instagram & TikTok.
• All-rounder Mentality (Your Biggest Opportunity): In an early-stage startup, there are no rigid boundaries. You are not afraid to take on tasks outside your core marketing focus: be it in operations, customer support, or packing the first large B2B orders. For you, this is not a chore, but a fantastic opportunity to understand every area of a D2C brand unfiltered from the ground up.

Why this job is special

• Can't get any closer: You will work directly with the founders and see how a brand is built from the inside.
• Early Stage, Female-Founded, Skincare: A combination that is rarely found – and an environment where your work is visible from day 1.
• Absolute Growth Phase: You will learn in months what others take years for: Brand Building, Social Media, E-Commerce, Startup Operations.

What you won't get with us

Honesty is one of our standards. So that neither of us wastes time:

• No frontal teaching: We don't have an onboarding academy or training weeks. We will, of course, explain everything you need, but you learn best by doing.
• No constant hand-holding: If you need fixed structures and constant close guidance to work well, that's completely okay – but then we are not the right environment for you. You will receive context, feedback, and responsibility, but no one will control or write your to-do list daily.
• No finished processes: Much of what we do is just beginning to be created. Those who see open questions as an invitation and develop solutions are exactly right for us.

In short: We are looking for someone who can figure things out independently, asks questions when they get stuck, and does not wait for knowledge to be brought to them.

Qualifications

What you bring with you

• You are looking for a mandatory internship as part of your studies (Duration: 6 months)
• You are looking for a voluntary internship for orientation (Duration: strictly limited to a maximum of 3 months)
• Independent learning style: You learn new things yourself. Through trial and error, asking questions, and observing the best.
• No silo thinking: You are interested in the big picture and are not too good for any task if it moves the team forward.
• Social Media Native: You know the algorithms of TikTok and Instagram inside and out. Ideally, you have already created your own content.
• Video editing skills: CapCut, Premiere, or Final Cut are your go-to tools, or you learn extremely quickly how to become good at them.
• Communication talent & Analytical understanding: You write captivating scripts and at the same time are not afraid of numbers (reach, engagement, conversion).
• AI affinity: AI is not a buzzword for you, but part of your workflow.
• No fear of dogs! A large (or small) dog runs around in our Hamburg home offices. You should be absolutely animal-loving and have no problem with furry friends.

Benefits

What we offer you

• Direct collaboration with the founders and insight into all areas of a growing D2C brand.
• Steep learning curve in Social Media, Brand Building, and Startup Operations.
• Flexible working style: Plenty of home office possibilities, combined with days we spend together.
• BYOD (Bring Your Own Device): Do you prefer working on your own setup? Perfect, we have BYOD.
• Compensation: We offer an expense allowance of €300 / month.
• Perspective: Those who impress, stay – e.g., as a working student after the internship.

Interested?

Don't send us a resume novel. Go to our social media channels and our online presence and take an unvarnished look at them.

Tell us three things that we can or must do better starting tomorrow in order to grow. No sugar-coating, please! We want to hear your real, analytical opinion!

Please also state directly in your application whether you are applying for the 3-month voluntary internship or a mandatory internship (including duration). Along with that, a link to your LinkedIn profile (or a short CV) and off you go.

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