Backend Developer, Partner Integrations

Are you a backend developer who enjoys building reliable integrations and delivering scalable solutions? Are you motivated by taking ownership of your projects from development to deployment?
Then you could be the one we are looking for to help build the integrations that connect JACK & JONES, VERO MODA and ONLY with leading marketplaces such as Amazon and Zalando! We offer the opportunity to work in a quality-driven environment with plenty of opportunities for professional development and technical challenges.

THE DEPARTMENT
Brand Tech is a dynamic e-commerce department with the ambition of making our brands the preferred fashion choice across both our own webshops and external marketplaces. You will join an in-house team of experienced frontend and backend developers working closely together to deliver robust digital solutions across brands.
You will become part of an international environment where collaboration, knowledge sharing and continuous improvement are central to the way we work.

THE JOB
As part of the Partner Team, you will develop and maintain the backend connectors that integrate our brands with marketplaces such as Amazon, Zalando and other partners. Your focus will be on building reliable, scalable integrations that ensure accurate and efficient data exchange.
Working in a data-driven environment, you will help ensure that product information, stock levels and pricing flow seamlessly between our internal systems and external marketplace platforms.

Your responsibilities will include:

• Developing and maintaining APIs and marketplace connectors
• Ensuring stable synchronisation of product data, stock and pricing
• Onboarding new marketplace partners
• Optimising integrations and data flows across systems
• Taking ownership of projects from implementation to deployment.

YOUR PROFILE
You're motivated by solving technical challenges and enjoy building reliable, scalable solutions. You're curious by nature, enjoy learning new technologies and value collaboration and knowledge sharing. You like working closely with your teammates and seeing your work through from development to deployment.

We care more about your curiosity, technical skills and genuine interest in software development than ticking every box. What matters most is that you:

• Have experience with .NET / C#
• Have experience working with XML and JSON
• Communicate well and enjoy collaborating across teams
• Speak and write English fluently

Experience with one or more of the following is an advantage:

Marketplace or e-commerce APIs (e.g. Amazon SP-API, Zalando Partner Program (zDirect), Tradebyte or Channable)

• Kubernetes
• Jira, GitHub and GitHub Actions
• Unit and integration testing
• Google Cloud Platform or other cloud providers
• Datadog
• Microservice architecture
• Event-driven integrations and message queues (e.g. Google Pub/Sub or Amazon SQS).

WE LOOK FORWARD TO HEARING FROM YOU
I f you have any questions regarding the position, feel free to contact Rasmus Skjoldborg Jørgensen Se telefonnummer på jobbank.dk. Otherwise, please send your application and CV along with relevant examples of your skills and previous projects no later than 30 October 2026.

WORKPLACE: Brande Denmark.

ABOUT BESTSELLER
At BESTSELLER, we are more than 20,000 people in 38 different countries working for over 20 fashion brands such as JACK & JONES, SELECTED, VERO MODA, ONLY, PIECES, VILA, OBJECT, MAMALICIOUS, NAME IT, NOISY MAY and Y.A.S. We are a family-owned company with a strong foundation and values to build on, empowering us to pursue the ideas we believe in to take BESTSELLER forward. We are committed to diversity and provide equal opportunities for everyone, irrespective of sex, race, ethnicity, religion or belief, disability, age, sexual orientation or gender identity. We strive to create an empowering environment where people can thrive and develop. For more information, visit .

You will become part of the BESTSELLER family, a culture where new ideas are welcomed, and all voices are heard. We believe in entrepreneurship; this means you have the freedom to do this in the way which works for you. You get responsibility and the opportunity to develop yourself and your area from day one. We believe in flexibility and autonomy in your daily routine and working location.