Senior Mendix Developer

About the Position

Senior Mendix Developer

Publication Date:

Sep 21, 2026

Ref. No:

538561

Location:

Amstelveen, NL

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About the Role

Atos Group is a global leader in digital transformation, with approximately 67,000 employees and an annual revenue of around €10 billion. We operate in 61 countries under two brands: Atos for services and Eviden for products. As a European market leader in cybersecurity, cloud, and high-performance computing, Atos Group is committed to a secure and climate-friendly future. We offer customized, AI-driven solutions for all sectors. Atos is an SE (Societas Europaea) and listed on Euronext Paris.

Our goal is to shape the future of the digital world. With our expertise and services, we support the development of knowledge, education, and research, with a multicultural approach. We contribute to scientific and technological innovation. Globally, the Group enables customers, employees, and society to live, work, and grow sustainably – in a secure and reliable digital environment.

We are looking for a Medior–Senior Mendix Developer for our teams. You have several years of experience with Mendix and want to work on stable, scalable applications within a professional and multidisciplinary environment.

In this role, you will work on enterprise Mendix applications for various clients. You will have the opportunity to think technically, take responsibility within projects, and develop towards a senior level.

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Responsibilities

• Develop, expand, and maintain Mendix applications in production environments
• Work on integrations with other systems via REST and SOAP
• Contribute to application design, data models, and technical solutions
• Improve performance, stability, and maintainability
• Collaborate with product owners, testers, UX designers, and other developers
• Participate in code reviews and knowledge sharing within the team
• (Pré) Work with React or custom UI components when necessary

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Requirements

• 3 to 5 years of experience as a Mendix Developer
• Experience with Mendix projects in a team setting
• Mendix Advanced Developer certification
• Experience with REST and SOAP integrations
• Basic knowledge of performance, security, and deployment
• Experience with Agile/Scrum working
• Fluency in Dutch and English, both spoken and written
• (Pré) If you also have:
  • Experience with larger or more complex Mendix environments
  • Some experience with Mendix Cloud or CI/CD
  • Basic knowledge of HTML, CSS, JavaScript, and/or React
  • Experience with enterprise or legacy systems

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We Offer

• A market-competitive salary with additional benefits
• 29 vacation days, with the possibility to build up extra days
• Vacation allowance (8%) and year-end bonus
• Flexible working hours and opportunities for hybrid work
• Pension plan and income protection
• A flexible benefits budget
• Access to training and certification platforms
• Career growth opportunities to senior roles within Atos or Eviden, in the Netherlands or internationally

At Atos, diversity and inclusion are embedded in our DNA. Read more about our commitment to a fair working environment for everyone.

Atos is a recognized leader in its industry in terms of environment, society, and governance. Read more about our CSR commitment.

Choose your future. Choose Atos.

Apply now »

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