• As a Senior Mendix Developer, you design, build, and maintain complex Mendix applications based on SAP S/4HANA. You safeguard the architecture, make technical decisions, integrate systems, and mentor junior developers to ensure high quality and stability.
• By developing scalable and stable applications used by 50,000 colleagues, you help ensure smooth in‑store processes. This increases operational efficiency and indirectly improves the customer experience.
• You will work within the Store Employee Experience team, alongside Mendix developers, testers, UX/UI designers, and business analysts. Together, you develop applications that are critical to the day‑to‑day operations of all stores.
• You collaborate closely with SAP specialists, AWS experts, and other Mendix teams. In addition, you work with business stakeholders to validate functionality and implement improvements based on feedback.

As a Senior Mendix Developer, you play a key role in designing, building and maintaining a large and complex Mendix landscape on top of our new SAP S/4HANA platform. You develop applications that are used daily by more than 50,000 colleagues and are critical to our store operations.

You drive quality, stability and scalability. You make technical decisions, coach junior developers, safeguard Mendix architecture and integrate our applications with SAP, other Mendix apps and AWS.

You build it, you run it and you own it, end to end.

Together, we are Jumbo: this is where you’ll work
You work within the Store Employee Experience team, where Mendix plays a key role in supporting store processes. You collaborate closely with testers, UX/UI designers, business analysts and Mendix developers from multiple teams.

As a senior, you take the lead in:

• Designing technical solutions and Mendix architecture
• Further developing standards and best practices
• Coaching colleagues and raising overall team quality
• Integrating with SAP, AWS and other systems
• Visiting stores to validate functionality and gather feedback

You are given plenty of room to innovate, take initiative and future-proof the Mendix landscape.

• 5+ years of experience with Mendix (Advanced or Expert certification is a plus)
• Proven ability to design scalable Mendix architectures
• Experience with integrations (SAP, APIs, Mendix apps, AWS)
• Strong communication skills and the ability to engage stakeholders
• Full ownership mentality, including independently participating in the stand-by rotation
• Experience coaching others and actively contributing to team maturity
• The ability to identify improvement opportunities and turn them into action

• A gross monthly salary between €5,100 and €6,500 (based on a 40-hour workweek).
• An annual bonus of up to 5% of your yearly salary, depending on organisational objectives.
• 30 vacation days (with the option to buy or sell additional days) and 8% holiday allowance.
• Pension accrual through participation in the Industry Pension Fund for the Food Retail sector.
• Travel allowance of €0.21 per kilometre (up to 35 km one way). We enjoy working together at the office, but partial remote work is also possible.
• Plenty of room for entrepreneurship, growth and development — not only in your role, but also through the Jumbo Academy, online training via GoodHabitz and a personal training budget.
• A fresh daily lunch in our Foodcafé, great coffee and fresh fruit.
• The opportunity to work out daily in our Jumbo Gym for a small contribution.
• Employee benefits, such as 10% discount on your groceries (up to €325 per year), participation in our collective health insurance and discounts via Benefits at Work.

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