Senior Mendix Developer

JUMBO; Veghel; On-site; EUR 65,000 - 85,000; Full time

Job summary

A leading retail company in the Netherlands seeks a Senior Mendix Developer to design, build, and maintain complex Mendix applications on SAP S/4HANA, impacting the daily operations for over 50,000 store employees. This role requires a strong knowledge of Mendix and collaboration with various teams including SAP, UX/UI designers, and business analysts. Preferred candidates will have over 5 years of experience, proven architecture design skills, and the ability to coach others. Opportunities for innovation and improvement are encouraged.

Qualifications

• 5+ years of experience with Mendix.
• Proven ability to design scalable Mendix architectures.
• Experience with SAP and API integrations.

Responsibilities

• Design and maintain complex Mendix applications on SAP S/4HANA.
• Coach junior developers and ensure quality.
• Collaborate with cross-functional teams for app development.

Skills

Mendix Development

SAP Integration

AWS

Coaching

Stakeholder Engagement

Education

Advanced or Expert Mendix Certification

Job description

• As a Senior Mendix Developer, you design, build, and maintain complex Mendix applications on top of SAP S4. You safeguard architecture, make technical decisions, integrate systems, and coach junior developers to ensure quality and stability.
• By developing scalable, stable apps used by 50,000 colleagues, you ensure smooth store processes. This makes work more efficient and indirectly improves the customer experience.
• You work in the Store Employee Experience team with Mendix developers, testers, UX/UI designers, and business analysts. Together, you develop apps that are crucial for daily operations in all stores.
• You collaborate with SAP specialists, AWS experts, and other Mendix teams. Additionally, you work closely with business stakeholders to validate functionality and implement improvements based on feedback.

Get started! This is what you’ll do
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.

Your workday as a Senior Mendix Developer
09:00 – 09:15 Daily stand-up with your scrum team
10:00 – 11:00 Refinement sessions and solution design for complex challenges
11:00 – 12:00 Code reviews and coaching of junior colleagues
13:00 – 16:30 Deep focus on development, integrations and architectural challenges
16:30 – 09:00 Periodically participating in the stand-by rotation (with compensation), independently resolving critical incidents

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.

Profile

• 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

We offer