Senior Product Designer AI Platform

📍 Job Overview

Job Title: Senior Product Designer AI Platform

Company: Mendix

Location: Rotterdam, South Holland, Netherlands

Job Type: Full-time

Category: Product Design / UX/UI Design

Date Posted: 2026-08-31

Experience Level: Mid-Senior Level (2-5 years)

Remote Status: Hybrid

🚀 Role Summary

• Drive UX design strategy and execution across the entire product lifecycle, from ideation through to final implementation for an AI Platform.

• Champion human-centered design principles by translating complex user insights and customer feedback into intuitive and effective user experiences.

• Leverage advanced design tools like Figma and established design systems to create cohesive and scalable product interfaces.

• Play a pivotal role in the innovation of Mendix's Agentic Enterprise Platform, contributing to cutting-edge AI technologies.

• Collaborate closely with cross-functional teams, including R&D and engineering, to ensure seamless integration of design and development.

📝 Enhancement Note: This role is positioned as a "Senior Product Designer," indicating a need for significant autonomy, leadership in design initiatives, and the ability to mentor or guide less experienced designers. The focus on an "AI Platform" and "Agentic Enterprise Platform" suggests a complex, forward-looking product requiring a deep understanding of user needs in advanced technology environments.

📈 Primary Responsibilities

• Lead the end-to-end UX design process for the AI Platform, encompassing user research, ideation, wireframing, prototyping, and high-fidelity visual design.

• Conduct regular usability evaluations and user interviews with customers to gather actionable insights and validate design decisions, directly influencing product usability and feature development.

• Develop and refine user personas, journey maps, and user flows to clearly articulate user needs and design solutions.

• Own the design of specific features or components, from initial concept to successful implementation, proactively identifying and mitigating design and technical challenges.

• Create and maintain detailed design documentation, including specifications and style guides, to ensure consistency and facilitate developer handoff.

• Actively contribute to and evolve the Mendix design system, ensuring a unified and efficient design language across the platform.

• Stay abreast of emerging trends in UX design, AI, and software development tools, integrating new knowledge to enhance design practices and product innovation.

• Share design expertise and best practices with R&D teams and other stakeholders to foster a culture of design excellence.

📝 Enhancement Note: The responsibilities emphasize a blend of strategic design leadership and hands-on execution. The direct engagement with customers for validation and insight translation is a key differentiator for this role, highlighting the importance of user advocacy and iterative design.

🎓 Skills & Qualifications

Education: Bachelor's or Master's degree in Design, Human-Computer Interaction (HCI), or a related field, or equivalent practical experience.

Experience: 2–5 years of progressive experience in product design, with a strong portfolio showcasing end-to-end design ownership.

Required Skills:

• Expert proficiency in Figma for UI/UX design, prototyping, and collaborative workflows.

• Demonstrated experience in designing and working with established design systems.

• Proven ability to conduct user research, usability testing, and translate findings into human-centered design solutions.

• Strong understanding of the full product development lifecycle, from concept generation to final implementation.

• Excellent English communication skills, both written and verbal, with the ability to articulate design rationale effectively to technical and non-technical stakeholders.

• Ability to work autonomously in a fast-paced, dynamic, and agile environment.

• Experience in customer engagement for design validation and insight gathering. Preferred Skills:

• Familiarity with generative AI, agentic AI, and AI Agent concepts and their application in product design.

• Experience designing components specifically for a design system.

• Background in designing complex software development tools or sophisticated enterprise platforms.

• Practical experience with agentic development tools such as Claude Code, OpenAI Codex, Figma Design Agent, or similar.

• Understanding of visual modeling concepts as used in platforms like Mendix.

📝 Enhancement Note: The preferred skills strongly suggest a focus on future-oriented AI technologies, indicating that candidates with exposure to these areas will have a significant advantage. The mention of "software development tools" implies a potential need to understand the needs of developers as users.

📊 Process & Systems Portfolio Requirements

Portfolio Essentials:

• Showcase a minimum of 3-5 comprehensive case studies demonstrating end-to-end product design ownership.

• Highlight projects where user research and customer validation directly informed design decisions and led to measurable improvements.

• Include examples of complex problem-solving, detailing the design process, challenges encountered, and solutions implemented.

• Present work that utilizes Figma extensively, demonstrating proficiency in advanced features and collaborative workflows.

• Feature at least one project that involved contributing to or utilizing a design system effectively. Process Documentation:

• For each case study, clearly outline the problem statement, target users, design process employed (e.g., double diamond, agile sprints), and key deliverables (wireframes, prototypes, final UIs).

• Document how user feedback and usability testing were integrated into the iterative design process.

• Demonstrate an understanding of developer handoff processes and how design specifications were communicated.

• Clearly articulate the impact of your design solutions, ideally with quantifiable metrics or qualitative outcomes.

📝 Enhancement Note: Given the "Senior" title and the focus on an AI platform, the portfolio should emphasize strategic thinking, problem-solving complexity, and the ability to drive design initiatives from conception to successful product launch. Evidence of working with design systems and conducting customer validation is critical.

💵 Compensation & Benefits

Salary Range: €69,100 - €100,000 annually. This range is based on the provided salary information and is typical for a Senior Product Designer role in Rotterdam, Netherlands, considering the specified experience level and the nature of the company (Siemens Software/Mendix). The actual compensation will be determined by the candidate's specific qualifications, experience, and relevant education.

Benefits:

• Comprehensive health and wellness benefits package.

• Generous Paid Time Off (PTO) of 30 days annually.

• Hybrid work environment with flexibility.

• Flexible working hours to support work-life balance.

• Access to career development training programs.

• A dedicated training budget for professional growth and skill enhancement.

• "10% time" initiative: Two days per month dedicated to exploring new features, learning new technologies, or pursuing personal development courses.

• "Crafting days": Monthly opportunities for focused work on technical topics of interest, exploration of emerging technologies, or contributions to innovation projects.

Working Hours: Standard full-time hours (approximately 40 hours per week) with a hybrid arrangement, implying a balance between remote and in-office work. Flexibility is noted.

📝 Enhancement Note: The provided salary range is specific and falls within the expected bracket for a senior design role in a major European tech hub like Rotterdam, especially within a large corporation like Siemens. The benefits package is robust, with particular emphasis on professional development and employee well-being, aligning with a company that values innovation and employee growth.

🎯 Team & Company Context

🏢 Company Culture

Industry: Software Development, Low-Code/No-Code Platforms, Enterprise Software. Mendix, as part of Siemens Software, operates in the highly competitive enterprise software market, focusing on accelerating digital transformation through its visual development platform. The AI Platform initiative places it at the forefront of emerging technology trends.

Company Size: Mendix is a significant player, and as part of Siemens, it benefits from the resources of a global industrial software leader. The R&D organization is substantial, with specific teams distributed across Munich and Rotterdam.

Founded: Mendix was founded in 2010. Its integration into Siemens in 2018 brought significant scale and market reach.

Team Structure:

• The AI Platform team is part of Mendix's global R&D organization, situated in Rotterdam, Netherlands.

• This team is responsible for driving innovation within Mendix, focusing on cutting-edge technologies like Agentic Enterprise Platforms.

• The team likely comprises product managers, software engineers, UX/UI designers, and AI specialists.

• Collaboration is expected to be close-knit within the Rotterdam hub, with broader connections to R&D units globally, particularly Munich. Methodology:

• Mendix champions visual modeling to abstract coding, enabling faster application development and collaboration between business and technical users.

• The company emphasizes agile development methodologies, continuous integration, and a focus on product quality.

• For the AI Platform team, this likely translates to rapid iteration, experimentation with AI technologies, and a strong feedback loop with customers and internal stakeholders.

Company Website: https://www.mendix.com/

📝 Enhancement Note: Mendix's positioning as a low-code platform is crucial context. The Senior Product Designer will be designing for a platform that empowers both business users and developers, requiring a nuanced understanding of different user needs and interaction paradigms. The integration with Siemens implies a blend of startup agility and corporate structure.

📈 Career & Growth Analysis

Operations Career Level: This is a "Senior Product Designer" role, signifying a mid-to-senior level position. It implies a high degree of autonomy, responsibility for significant product areas, and the expectation of contributing to design strategy and mentorship. The role is central to driving innovation within a critical R&D unit.

Reporting Structure: The designer will likely report to a Design Lead, Head of Product Design, or a Product Management lead within the AI Platform R&D group. They will collaborate closely with Product Managers, Engineering Leads, and AI Specialists.

Operations Impact: The Senior Product Designer's impact will be direct and significant. By shaping the user experience of the AI Platform, they will influence how customers build and deploy applications, directly affecting Mendix's market position, customer adoption rates, and the overall success of its Agentic Enterprise Platform initiatives. Their work will be instrumental in translating complex AI capabilities into usable, valuable tools for enterprises.

Growth Opportunities:

• Specialization: Deepen expertise in AI product design, agentic systems, and complex enterprise software UX.

• Leadership: Potential to move into a Lead Product Designer role, managing a team or a larger product domain, and mentoring junior designers.

• Cross-functional Mobility: Opportunities to work on different Mendix products or collaborate with other Siemens Software divisions.

• Skill Development: Leverage the "10% time" and "Crafting days" for learning new technologies, advanced design techniques, or exploring AI research.

• Strategic Contribution: Influence the future direction of Mendix's AI strategy and product roadmap.

📝 Enhancement Note: The "Senior" title coupled with the focus on cutting-edge AI technology suggests a role with considerable growth potential, not just in design skills but also in strategic influence and potential leadership within a rapidly evolving tech domain.

🌐 Work Environment

Office Type: The role is hybrid, indicating a modern office environment designed for collaboration, with dedicated spaces for individual focus and team activities. Mendix emphasizes a flexible work approach.

Office Location(s): The primary office location for this role is Rotterdam, Netherlands. This office is described as modern and conducive to meeting colleagues several times per week.

Workspace Context:

• The workspace is designed to support a hybrid model, likely featuring collaboration zones, meeting rooms equipped with necessary technology, and quiet areas for focused work.

• Access to industry-standard design tools and technologies, including high-performance workstations, is expected.

• Opportunities for regular interaction with fellow designers, product managers, and engineers within the Rotterdam hub will be available, fostering a collaborative and innovative atmosphere.

• The environment is expected to be open, encouraging communication and knowledge sharing, aligning with Mendix's stated culture.

Work Schedule: A hybrid work schedule is standard, with an expectation of being in the Rotterdam office several times per week. Flexible working hours are offered, allowing individuals to manage their schedules effectively around core collaboration times and personal needs, which is beneficial for deep work required in design and AI development.

📝 Enhancement Note: The "hybrid by default" culture, combined with explicit mentions of flexible hours and dedicated "crafting days," points to a work environment that highly values employee autonomy and work-life balance, while still fostering in-person collaboration.

📄 Application & Portfolio Review Process

Interview Process:

• Initial Screening: A recruiter or hiring manager will review your application and portfolio. A strong portfolio is crucial here.

• Technical Interview / Portfolio Review: Expect to walk through selected case studies from your portfolio, explaining your design process, decision-making, and impact. This is where your ability to articulate complex design challenges and solutions will be assessed. Prepare to discuss your experience with Figma, design systems, and user research.

• Design Challenge (Potentially): You might be given a small design exercise or asked to critique an existing product/feature, focusing on problem-solving and your approach to user-centered design.

• Team/Stakeholder Interviews: Interviews with potential team members (engineers, product managers, other designers) to assess cultural fit, collaboration style, and technical understanding. Expect behavioral questions related to teamwork, problem-solving, and handling ambiguity.

• Final Interview: Possibly with a senior leader, focusing on strategic thinking, leadership potential, and overall alignment with Mendix's vision.

Portfolio Review Tips:

• Curate Strategically: Select 3-5 diverse projects that best showcase your skills relevant to this role: end-to-end UX, AI/complex software, Figma expertise, design systems, and customer validation.

• Tell a Story: For each case study, clearly define the problem, your role, the process, the challenges, your solutions, and the outcomes. Quantify impact where possible.

• Showcase Process, Not Just Polish: Demonstrate your thinking, iteration, and how you used research to drive decisions. Include wireframes, user flows, and prototypes.

• Highlight AI/Complex Systems: If you have relevant experience, emphasize it. Discuss how you approached designing for complex technical domains or AI-driven features.

• Figma Proficiency: Be ready to discuss your Figma workflow, component usage, and design system interactions.

• Conciseness: Ensure your portfolio is easy to navigate and the key takeaways are clear.

Challenge Preparation:

• Understand the Domain: Familiarize yourself with Mendix's low-code platform and the concepts of AI Platforms and Agentic AI. Research Mendix's existing products and customer stories.

• Practice Articulation: Rehearse explaining your design process and decisions clearly and concisely, anticipating questions about trade-offs, constraints, and impact.

• User-Centricity: Always frame your solutions around user needs and business goals.

• Problem-Solving Framework: Be ready to apply a structured approach to any design challenge presented.

📝 Enhancement Note: The emphasis on customer validation and the specific mention of AI/agentic tools in preferred qualifications strongly suggests that interviewers will probe deeply into how candidates translate complex technical capabilities into user-friendly experiences and how they engage with users for feedback.

🛠 Tools & Technology Stack

Primary Tools:

• Figma: Essential for UI/UX design, prototyping, and collaborative workflows. Expert proficiency is required.

• Design Systems: Experience with creating, maintaining, or contributing to design systems is crucial for maintaining consistency and efficiency.

• Prototyping Tools: Figma's prototyping capabilities are key, but familiarity with other tools may be beneficial.

Analytics & Reporting:

• While not explicitly mentioned, experience with product analytics tools (e.g., Amplitude, Mixpanel, Google Analytics) to understand user behavior and inform design decisions would be advantageous.

• Familiarity with generating reports or dashboards to communicate design impact. CRM & Automation:

• Experience with CRM systems is not directly required for this design role but understanding how user data flows from CRM or other systems into the platform can be helpful context.

• Familiarity with agile project management tools (e.g., Jira, Confluence) is standard for software development environments.

📝 Enhancement Note: Figma is the central tool mentioned. The role requires deep expertise here, including advanced features and collaborative capabilities. Experience with design systems is equally important for ensuring scalability and consistency in a complex product environment.

👥 Team Culture & Values

Operations Values:

• Innovation & Cutting-Edge Technology: A strong drive to work with and contribute to advanced technologies like AI and agentic platforms.

• User-Centricity & Customer Focus: A commitment to understanding and advocating for user needs, evidenced by direct customer engagement and usability validation.

• Collaboration & Open Communication: A culture that encourages teamwork, knowledge sharing, and open dialogue across disciplines and geographies.

• Efficiency & Agility: Embracing agile methodologies and efficient processes to deliver high-quality software rapidly.

• Ownership & Autonomy: Encouraging individuals to take responsibility for their work and empowering them to make an impact.

Collaboration Style:

• Cross-functional Integration: Designers are expected to work seamlessly with product managers, engineers, and AI specialists, fostering a collaborative environment where design is integrated early and continuously.

• Feedback Culture: An openness to constructive feedback, both giving and receiving, to drive continuous improvement in design and product.

• Knowledge Sharing: Actively participating in sharing insights, best practices, and learnings across teams, particularly within the R&D organization.

📝 Enhancement Note: The emphasis on "start-up culture," "flat structure," and "freedom to make an impact" suggests a dynamic, collaborative environment where individual contributions are highly valued and encouraged.

⚡ Challenges & Growth Opportunities

Challenges:

• Designing for AI Complexity: Translating the capabilities and potential of advanced AI and agentic systems into intuitive and understandable user experiences for diverse user groups.

• Balancing User Needs with Technical Constraints: Navigating the complexities of AI development and platform limitations while ensuring a user-friendly and effective product.

• Rapidly Evolving Technology: Staying current with the fast pace of AI advancements and integrating new concepts into the platform design effectively.

• Cross-Disciplinary Collaboration: Effectively communicating complex design concepts to and collaborating with highly technical AI researchers and engineers.

Learning & Development Opportunities:

• AI & Agentic Systems Specialization: Deepen expertise in designing for AI, including generative AI and agentic AI, through dedicated projects and learning resources.

• Advanced UX/UI Techniques: Enhance skills in areas like interaction design, information architecture, and visual design for complex platforms.

• Leadership & Mentorship: Opportunities to guide junior designers and take on more strategic design leadership responsibilities.

• Industry Exposure: Access to training budgets and potentially industry conferences to stay at the forefront of design and AI trends.

• Innovation Time: Dedicated "10% time" and "Crafting days" provide significant opportunities for self-directed learning and exploration of new technologies.

📝 Enhancement Note: The role presents significant challenges at the cutting edge of AI and software design, but these are directly counterbalanced by substantial learning and growth opportunities, particularly through Mendix's structured programs for innovation and professional development.

💡 Interview Preparation

Strategy Questions:

• "How would you approach designing a user interface for an AI agent that needs to assist developers with code generation?" (Focus on user needs, AI capabilities, feedback loops, and error handling).

• "Describe a time you had to balance conflicting user feedback with technical feasibility. How did you resolve it?" (Demonstrate problem-solving, negotiation, and user advocacy).

• "How do you ensure your design decisions are data-driven, especially when dealing with novel AI features where user data might be scarce initially?" (Discuss qualitative research, hypothesis testing, and iterative design). Company & Culture Questions:

• "What interests you about Mendix's low-code platform and its application in enterprise software?" (Show understanding of Mendix's value proposition).

• "How do you see your role contributing to Mendix's innovation in AI?" (Connect your skills to their strategic goals).

• "Describe a time you worked in a fast-paced, dynamic environment. How did you manage your priorities and deliver results?" (Highlight adaptability and self-management). Portfolio Presentation Strategy:

• Start with the 'Why': Clearly articulate the problem your project aimed to solve and the user needs it addressed.

• Show Your Process: Detail your steps, including research, ideation, wireframing, prototyping, testing, and iteration. Use visuals to illustrate your journey.

• Highlight Your Role & Impact: Be specific about your contributions, especially if working in a team. Quantify outcomes (e.g., improved conversion, reduced error rates, increased user satisfaction) or describe qualitative benefits.

• Discuss Trade-offs: Acknowledge challenges and explain the design decisions made to overcome them, including any compromises.

• Figma & Design System Focus: Be prepared to discuss your specific Figma workflows and how you leveraged or contributed to design systems.

• AI/Complex System Nuances: If relevant, explain how you approached the unique design considerations for AI or complex technical products.

📝 Enhancement Note: Interviewers will likely focus on your ability to translate complex technical concepts (AI, Agentic Systems) into user-friendly interfaces, your experience with Figma and design systems, and your approach to user research and validation. Be prepared to discuss your thought process in detail for each case study.

📌 Application Steps

To apply for this Senior Product Designer position:

• Submit your application through the provided link on jobs.lever.co.

• Tailor Your Resume: Highlight your 2-5 years of product design experience, specific achievements in UX/UI, proficiency in Figma, and any experience with AI, design systems, or complex software platforms. Use keywords from the job description.

• Curate Your Portfolio: Select 3-5 strong case studies demonstrating end-to-end design ownership, user research, customer validation, Figma expertise, and ideally, experience with complex or AI-related products. Ensure it's well-organized and easy to navigate.

• Prepare Your Narrative: Be ready to articulate your design process, decision-making rationale, and the impact of your work during portfolio reviews and interviews. Practice explaining your case studies concisely and effectively.

• Research Mendix & Siemens: Understand their products, company culture, and their strategic focus on AI and low-code development. This will help you tailor your responses and demonstrate genuine interest.

⚠️ Important Notice: This enhanced job description includes AI-generated insights and operations industry-standard assumptions. All details should be verified directly with the hiring organization before making application decisions.