Mendix developer

Phoenix Technologies; Brussel; On-site; EUR 70,000 - 100,000; Full time

Benefits offered by this job

Mendix Expert certification

Experience in EU institution/public行政

Mendix AI capabilities experience

Job summary

Phoenix Technologies in Belgium seeks a Mendix-focused IT developer to design, build and maintain business applications on the Mendix platform within the GSC environment. You will work in agile, multidisciplinary teams alongside business analysts, UX/UI designers, testers and project managers, applying shared development principles for consistency.

Translate requirements into Mendix apps, build integrations with APIs and connectors, and contribute to a shared component library.

Qualifications

• At least 5 years IT development experience, including 3+ years with Mendix.
• Mendix Advanced Developer certification (minimum).
• Delivered at least two Mendix applications into production with enterprise integration.
• Experience with Mendix 10+ on-premises or private cloud deployment.
• Working knowledge of Java and JavaScript for custom actions and widgets.
• Experience working in Scrum or similar agile frameworks.

Responsibilities

• Translate user stories and business requirements into Mendix applications (domain models, flows, pages, security roles).
• Build integrations with internal and external systems via APIs and database connectors, and implement SAML/OIDC SSO.
• Develop reusable modules, widgets and components; contribute to a shared component library.
• Apply secure-by-design practices, RBAC and data protection requirements.
• Build accessible interfaces that meet WCAG 2.1 AA.
• Write unit and automated tests, participate in code reviews and manage tech debt.
• Support deployment, release management and production maintenance.
• Produce and maintain technical documentation.

Skills

Mendix

Java

JavaScript

APIs

Agile/Scrum

Education

Mendix Advanced Developer certification

Tools

Mendix 10

Job description

Role Summary

Designs, builds and maintains business applications on the Mendix low-code platform within the GSC's environment. Work in agile, multidisciplinary teams alongside business analysts, UX/UI designers, testers and project managers, and apply the GSC's shared development principles so that applications stay consistent, maintainable and reusable across the Mendix portfolio.

• Translate user stories and business requirements into working Mendix applications (domain models, flows, pages, security roles).
• Build integrations with internal and external systems via APIs and database connectors, and implement single sign-on (SAML/OIDC).
• Develop reusable modules, widgets and components in line with GSC standards, and contribute to a shared component library.
• Apply secure-by-design practices, role-based access control and data protection requirements.
• Build accessible interfaces that meet WCAG 2.1 AA.
• Write unit and automated tests, take part in code reviews, and use the Mendix Quality Add-ons or equivalent to keep technical debt under control.
• Support deployment, release management and third-level maintenance of applications in production.
• Produce and maintain technical documentation.

Required Qualifications And Experience

• At least 5 years of IT development experience, including at least 3 years hands-on with Mendix.
• Mendix Advanced Developer certification (minimum).
• Proven delivery of at least two Mendix applications into production, including integration with enterprise systems.
• Experience with Mendix 10 or later, on-premises or private cloud deployment.
• Working knowledge of Java and JavaScript for custom actions and widgets.
• Experience working in Scrum or similar agile frameworks.

Assets

• Mendix Expert certification.
• Experience in an EU institution or public administration.
• Experience with Mendix AI capabilities (e.g. GenAI connectors, Maia).

Languages

• English at C1 level. French is an asset.