Developer Intern - Backend (Spring Boot, Java)

About the role

Merkle, a Dentsu company and a leader in data-driven customer experience management, is looking for a developer intern for its Aarhus software team. The internship runs from mid-January for 3 to 4 months, is full-time and unpaid, and takes place in the office at Åboulevarden 18 in Aarhus. You will work on an API Management system that exposes endpoints from a marketplace for aircraft spare parts, mainly on the Backend-for-Frontend (BFF) layer handling users and applications against a database in Azure.

Key responsibilities

• Build and maintain backend solutions in Java/Spring Boot, including REST endpoints and integration with external services
• Work with unit tests, automated end-to-end testing and debugging
• Learn how a modern API Management system works, covering frontend, BFF, database and platforms such as SAP APIM and Entra ID
• Follow the professional development process, from business requirements to code running through version control, code review and CI/CD
• Collaborate through pair programming and agile methods, proposing your own solutions

Required profile

• A relevant degree in IT and software development
• Curious and willing to learn
• Engaging and open, able to work independently and in teams
• Thorough, professional and quality-minded

Required skills

• Java and Spring Boot
• REST API development
• Docker and Azure deployments
• Git and CI/CD workflows
• Unit testing and automated E2E testing

What we offer

• A mentor to support onboarding and help you feel ready for the tasks
• Free breakfast and lunch
• Social events and many learning opportunities
• An opportunity to be hired after the internship if it is a good match