As part of the Digital Experiences – Rapid Apps Platform organisation, the role holder is the expert Mendix developer and architect who will drive the technical success of our Mendix applications. This job exists to provide deep Mendix platform knowledge and leadership in solution development. The Technical Lead ensures that applications built on Mars’ Mendix platform are well-architected, meet business requirements, and follow best practices for performance and maintainability.

We need this role to bridge business needs with the low-code technical implementation and solve complex technical challenges on the platform. This role is essential to fully realise the potential of Mendix in delivering quality solutions rapidly and maintaining them over time.

What are we looking for?

• Bachelor's or Master's degree in IT, computer sciences, management, economics or equivalent.

• Proven skills on the Mendix Platform

• Both written and oral fluency in English

• Experience with Power Platform would be a plus

What will be your key responsibilities?

Application Design & Architecture: Oversee the end-to-end technical design of applications built on Mendix. Work closely with business analysts, product owners and development teams to understand functional requirements and solution architecture – including domain model (data modelling), microflow design (business logic), page layouts (UI/UX), and integration interfaces 6 6. Ensure the design aligns with Mendix best practices and meets scalability and maintainability criteria.

Integration of External Systems: Implement integrations between Mendix apps and external services/databases. Use REST or SOAP connectors, OData services, JDBC/ODBC for direct database connections, and leverage the Mendix App Store modules for specific integrations when possible. Handle data mapping and transformation within microflows to ensure seamless data exchange.

Code Reviews & Quality Assurance: Review the application models and configurations done by other Mendix developers at Mars. Conduct thorough model reviews to ensure consistency with design principles and that naming conventions, error handling, and logic are implemented correctly. Use Mendix’s built-in Find errors and consistency checks to catch issues. Mentor the team by providing constructive feedback and guidance on how to improve the solution.

Performance Tuning: Make sure all developments are being properly tested, analyzed and optimized during development and testing phases.

Hands-on Development: More occasionally, the role holder might serve as a lead developer by building key components of the application in Mendix Studio Pro. This may include creating entities, microflows, pages, navigation, and using Java actions or front-end custom code when necessary 1. The Technical Lead may also help with the development of the most technically challenging stories of some projects (e.g., implementing integrations with external systems or complex logic).

Testing & Validation: Establishing standard testing practices for Mendix apps and ensuring they are properly conducted by development teams. Develop sample data and test cases to validate each component of the application. Automate tests when feasible (using Mendix ATS or Selenium for UI). Ensure that security tests (role-based access checks) are performed. The Technical Lead signs off that an application is technically sound and secure before it can be deployed to production.

Deployment Support: Although the Platform Owner manages the environments, the Technical Lead supports deployment by preparing release packages and environment-specific settings. The role owner uses the Mendix Developer Portal to transport applications between environments or resolve any issues that arise (like configuration differences or data initialisation needed). After deployment, verify that the application is running as expected in the new environment (smoke testing).

Maintenance & Troubleshooting: Provide the third level of support for Mendix applications after they go live. Checks with internal teams at Mars or with Mendix if the platform’s condition is identified as the root cause.

Best Practice Champion: Act as the champion of Mendix development best practices and conventions. Create and maintain internal guidelines or a “playbook” for Mendix development for the team – covering things like module layering, usage of constants vs settings, error handling patterns, etc. Ensure that the team follows an agile methodology suited for low-code (frequent iterations, close feedback with users) and effectively uses Mendix collaboration features (stories, feedback management) to streamline development.

Mentoring and Leadership: Mentor junior Mendix developers by providing hands-on coaching in using Mendix Studio Pro and Modeller. Organise peer programming or knowledge-sharing sessions to elevate the overall capability of the development team.

Continuous Improvement & Innovation: Keep abreast of new releases and features of the Mendix platform (such as product updates, new widgets, or AI-assisted development features). Evaluate how these can be leveraged in current or future projects. Similarly, look for opportunities to use the Mendix Marketplace components or share internally developed components for reuse across projects.

What can you expect from Mars?

• Work with diverse and talented Associates, all guided by the Five Principles.
• Join a purpose-driven company, where we’re striving to build the world we want tomorrow, today.
• Best-in-class learning and development support from day one, including access to our in-house Mars University.
• An industry-competitive salary and benefits package, including a company bonus.

#TBDDT