Senior C# Software Engineer - Studio Pro (Hybrid), Rotterdam

Mendix– the leading low-code application development platform:

The Mendix Platform uses visual modeling to abstract long-form coding out of application development. Our customers use Mendix to create and deploy better software for the enterprise, faster.

Mendix enables collaboration between business users and developers to work together throughout the development process.

Read our

Customer Stories

to learn more about the wealth of software and solutions global organizations have built with the Platform.

At Mendix we strive to maintain a diverse, open, and safe working environment where people can be their true selves. We value every voice, celebrate individuality, and appreciate the diversity of thought and experience. People who work here are driven, smart, and really good at what they do.

As this market evolves, we encourage people of all skill levels to work with the platform, both for clients and candidates. Apply today to discover how you can make a meaningful impact with Mendix.

About the Team:

You will join a core engineering group responsible for the foundations of Studio Pro, Mendix’s flagship IDE. This team builds and maintains critical platform components such as version control, solution governance, and backend mechanisms that power collaborative development.

Most development is C#/.NET and backend-focused, with selected native UI components also implemented in C#.

The Role:

Are you a hands-on, proactive C# developer who enjoys building complex development platforms? Do you want to work on an IDE used by thousands of professional and citizen developers alike? Are you motivated by solving architectural challenges and simplifying complexity for others?

As a Senior C# Software Engineer, you will take ownership of core functionality within Studio Pro. You will design, extend, and refactor platform mechanisms that enable version control, governance, and application development at scale. Your work directly impacts how Mendix developers build, collaborate, and deliver applications worldwide.

Responsibilities:

Design, implement, and maintain core Studio Pro functionality using C# and .NET Analyze complex problems and break them down into clean, maintainable solutions Apply an iterative development approach, delivering improvements in short feedback cycles Investigate existing functionality to refactor, improve performance, and introduce new featuresTake ownership of quality through proactive risk identification, testing, and code reviews Collaborate closely with team members, valuing shared ownership and knowledge exchange Continuously learn and stay current with platform engineering, tooling, and software design best practices Required Experience:

4 plus years of professional experience in C# and .NET Strong background in backend development and desktop application development Experience designing and delivering large-scale components or systems Solid understanding of unit testing, test automation, and code review practices Familiarity with agile methodologies and working in cross-functional development teamsNice to have:

Experience building web applications with TypeScript and React Knowledge of Domain Specific Languages (DSLs) and metamodeling Experience designing frameworks or platforms for broad internal or external usage Familiarity with CI/CD pipelines and tools such as Jenkins or Bamboo Experience with multi-platform development, including macOSHands-on experience building Mendix applications Why Join Mendix?

Build tools for other developers

Your work powers the tools that thousands of developers rely on daily. You will not just build features. You will shape how software is created.

Solve patterns, not just problems

You will work on deep architectural challenges, designing scalable solutions that address systemic needs rather than isolated issues.

Think big and holistically

We value engineers who see the broader impact of their work. You will help build a cohesive, future-ready development environment.

Enable faster and easier app development for everyone

By improving Studio Pro, you directly support our mission of making application development accessible, efficient, and impactful for both technical and non-technical users.

#LI-Hybrid

#LI-RI1

If you see a job description and think,“I’d be perfect for that” but your experience doesn’t align perfectly with the qualifications – don’t let that hold you back. We’re always eager to hire talented, passionate candidates – so give it a try and apply.

Equal Employment Opportunity Statement

Mendix/Siemens is an Equal Opportunity and Affirmative Action Employer encouraging diversity in the workplace. All qualified applicants will receive consideration for employment without regard to their race, color, creed, religion, national origin, citizenship status, ancestry, sex, age, physical or mental disability unrelated to ability, marital status, family responsibilities, pregnancy, genetic information, sexual orientation, gender expression, gender identity, transgender, sex stereotyping, order of protection status, protected veteran or military status, or an unfavorable discharge from military service, and other categories protected by federal, state or local law.

EEO is the Law

Applicants and employees are protected under Federal law from discrimination. To learn more,

Click here .

Pay Transparency Non-Discrimination Provision

Siemens follows Executive Order 11246, including the Pay Transparency Nondiscrimination Provision. To learn more,

Click here .

California Privacy Notice

California residents have the right to receive additional notices about their personal information. To learn more, click

here . #J-18808-Ljbffr