Junior Backend Developer (High-Performance E-Commerce Platform, On-Site in Haarlem)

About the Role

We are looking for a Junior Backend Developer to join our team on-site in Haarlem.

This is an opportunity for a motivated recent graduate (or soon-to-graduate student) in Software Development, Computer Science, or a comparable field (HBO or equivalent) to start your professional career in a high-performance, high-impact environment.

You will contribute to the development of our next-generation e-commerce platform as we transition from a fully custom system to Commercetools. You will be part of a senior-led team that builds scalable, high-quality backend services using .NET Core 8, Azure, microservices architecture, CQRS, and Domain-Driven Design (DDD) principles.

We expect you to bring strong technical fundamentals, a proactive mindset, and a willingness to learn rapidly from experienced professionals.

Responsibilities

• Develop and maintain backend services in C# and .NET Core 8 within a microservices environment.

• Assist in migrating functionality from legacy systems to Commercetools, implementing standard and custom functionality.

• Work with RabbitMQ and other messaging solutions to build reliable asynchronous communication between services.

• Write SQL queries and manage data in Microsoft SQL Server.

• Support the development and maintenance of CI/CD pipelines using Azure DevOps.

• Collaborate with senior developers to extend Commercetools where needed for complex business requirements like logistics, payments, invoicing, and recurring orders.

• Contribute to code reviews, testing, and documentation, maintaining high standards of code quality and reliability.

• Continuously learn and apply best practices in backend development, cloud services, and scalable system architecture.

Requirements

• Recent graduate (or about to graduate) with an HBO degree in Software Engineering, Computer Science, or a related field.

• Solid foundation in C# and .NET Core development, including understanding of object-oriented programming and basic design patterns.

• Basic knowledge of relational databases and SQL, preferably with SQL Server.

• Interest in cloud platforms, ideally with some exposure to Azure (e.g., through internships, school projects, or self-study).

• Understanding of basic backend architecture concepts, such as REST APIs, microservices, messaging, and event-driven systems.

• Strong communication skills, with the ability to work effectively within a team and ask the right questions when needed.

• Eagerness to learn advanced concepts like CQRS, DDD, CI/CD pipelines, and scalable e-commerce system design.

• Proactive and disciplined work ethic: you take ownership of your learning curve and delivery tasks.

Nice to Have

• Internship or project experience with .NET Core, Azure, RabbitMQ, or SQL Server.

• Exposure to e-commerce systems (order management, logistics, payment processing).

• Familiarity with Commercetools or other headless commerce platforms.

• Experience working with Git, DevOps tools, or Agile/Scrum environments.

🙌 About Us

Vision Healthcare (VHC) is a fast-growing European company with a broad portfolio of direct-to-consumer brands. We manage a range of supplement, wellness, and beauty brands including Flinndal, Purasana, Vitaminen op Recept, VitaminExpress, Bärbel Drexel, and Vitamaze.

Our Haarlem office is the e-commerce engine behind these brands — and we’re growing fast. That’s why we’re looking for another talented developer to join our team.

📬 Ready to Apply?

Let’s talk! Send your CV and short motivation to [email protected], attention Diederik Oostburg.