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Our Sister (2021) is an emerging Belgian brand with their office & combined flagship store ‘Castart x Our Sister’ in the city center of Antwerp. It’s born with the idea of creating garments with heartfelt textures and vibrant colors that are well-balanced.

Our Sister is the female counterpart of Castart (2018). They share similar values but so as within a family also have their own ideologies to further grow internationally in the upcoming years.

We are looking for a junior designer womenswear to join our creative team of marketeers and designers. The position is full time and is available from May.

Duties and responsibilities: 

-  Designing the seasonal collections of Our Sister with guidance and support of our head of design
-  Support and execution of season marketing plan on peak moments together with our marketing team
-  Follow-up of collection processes of Our Sister from scratch to sample phase with our international suppliers
-  Structuring your design process and managing your agenda to keep our head of design informed about the next steps
-  Working together with our menswear designer on mutual ‘Castart x Our Sister’ projects


-  An educational background in fashion design
-  Familiar with graphic programs such as illustrator and InDesign
-  Curiosity & interest on current trends and developments within the fashion industry
-  Energetic and thrive in a busy working environment
-  A willingness to grow, learn and go the extra-mile for your team
-  Passionate about fashion and working at a scale-up environment
-  A first job experience can be a plus but is not recommended
-  You like to connect, set new goals and work in a team


-  An interesting and challenging position in a fast-growing international company
-  An attractive salary package that will match your qualifications
-  Free new seasonal outfits
-  A cosy and creative workspace in the heart of Antwerp
-  An exciting and busy workplace with a strong and supportive team of young colleagues
-  The ability to evolve in your task scope in line with your interests

Interested? Send your CV & motivation letter to