Senior Product Designer

📍 Job Overview

Job Title: Senior Product Designer

Company: Cirql One GmbH

Location: Heidelberg, Baden-Württemberg, Germany

Job Type: FULL_TIME

Category: Product Design / User Experience (UX)

Date Posted: March 31, 2026

Experience Level: Senior (7+ years product design, 4+ years B2B complex software)

Remote Status: On-site

🚀 Role Summary

• Spearhead the design of the user interface for an enterprise semantic intelligence layer, focusing on representing complex semantic models, metrics, and governance rules.

• Translate intricate business requirements and abstract concepts into scalable, user-friendly interaction patterns for both technical and non-technical enterprise users.

• Drive end-to-end design ownership, collaborating directly with engineering and product management from initial concept ideation through to final product shipment.

• Design innovative interfaces that facilitate collaboration between humans and AI, enabling natural language exploration, structured reasoning, and governed output generation.

📝 Enhancement Note: This role is positioned as a senior individual contributor with significant ownership, requiring a blend of strategic thinking and hands-on execution. The emphasis on "enterprise semantic intelligence" and "AI-first by default" indicates a focus on complex B2B software, likely involving data platforms, AI/ML interfaces, and sophisticated workflow management. The "no handoffs" approach highlights a collaborative, integrated product development process.

📈 Primary Responsibilities

• Define and own the user interface (UI) layer for the platform, dictating how semantic models, metrics, governance rules, and data lineage are visually represented, versioned, and navigated.

• Conceptualize and develop scalable interaction patterns that effectively bridge the gap between complex technical data structures and the needs of diverse enterprise stakeholders, including data engineers and business leaders.

• Execute the full product design lifecycle, from user research and problem framing to interaction design, wireframing, prototyping, and high-fidelity visual execution, ensuring seamless integration with engineering development.

• Design intuitive and powerful interfaces that enable effective human-AI collaboration, supporting natural language queries, AI-driven insights, and governed data outputs.

• Conduct comprehensive user research, including interviews and usability testing, with enterprise customers to gather insights and inform design decisions, articulating clear rationales for design choices.

• Clearly articulate and defend design rationale to a variety of audiences, including founders, engineers, product managers, and customers, effectively communicating design decisions in both technical and non-technical contexts.

• Contribute to the development of a design system and reusable components to ensure consistency and scalability across the platform.

📝 Enhancement Note: The responsibilities emphasize end-to-end ownership and direct collaboration, typical of senior roles in early-stage or rapidly growing B2B SaaS companies. The focus on translating complex enterprise data into AI-interpretable formats suggests a need for strong analytical thinking and the ability to simplify complex systems.

🎓 Skills & Qualifications

Education: While no specific degree is mandated, a strong understanding of design principles, human-computer interaction, and user-centered design methodologies is expected, often gained through formal education or extensive practical experience.

Experience:

• Minimum of 7 years of professional product design experience.

Required Skills:

• Enterprise Design Depth: Proven track record designing for complex B2B enterprise software, demonstrating an understanding of user needs within large organizations.

• Systems Thinking: Ability to conceptualize and design coherent patterns at scale, maintain a broad design vision, and break it down into manageable, shippable components without compromising the overall integrity.

• End-to-End Design Process: Demonstrated ability to manage the entire design lifecycle, from initial user research and problem definition to interaction design, prototyping, and high-fidelity visual execution.

• AI-First Design: Fluency in designing for human-AI collaboration, including experience with agentic workflows and natural language interfaces.

• Collaborative Partnership: Proven ability to work closely and effectively with engineering teams throughout the development cycle, acting as a true partner rather than a handoff point.

• Clear Communication: Excellent verbal and written communication skills, capable of articulating design rationale precisely to both technical and non-technical stakeholders.

• Portfolio: A strong portfolio showcasing end-to-end design processes on genuinely challenging problems, with clear evidence of research, problem framing, interaction design, and final execution.

Preferred Skills:

• Background in data visualization, dashboard design, or developer-facing tools.

• Experience designing natural language interfaces or AI-assisted user experiences.

• Familiarity with semantic intelligence concepts and enterprise data structures.

📝 Enhancement Note: The experience requirements are quite specific, emphasizing complex B2B software and AI/ML interfaces. The "AI-first by default" requirement suggests a forward-thinking company where AI integration is a core tenet, not an afterthought. A strong portfolio is paramount.

📊 Process & Systems Portfolio Requirements

Portfolio Essentials:

• End-to-End Case Studies: Showcase at least 2-3 comprehensive case studies detailing your process from initial problem discovery and user research through to interaction design, prototyping, and final high-fidelity execution.

• Complex B2B Software Focus: Prioritize projects that demonstrate experience with complex enterprise software, data platforms, developer tools, or analytics applications, highlighting your ability to handle intricate user flows and data structures.

• Human-AI Collaboration Examples: Include projects that specifically illustrate your experience designing interfaces for human-AI interaction, natural language processing, or AI-assisted workflows, showcasing how you enable users and AI to work together effectively.

• Problem Framing & Rationale: Clearly articulate the business problem, user needs, and design challenges addressed in each project. Provide a strong rationale for design decisions, explaining trade-offs and how your solutions met specific objectives.

• Visual Design & Prototyping: Demonstrate a high level of proficiency in visual design, interaction design, and prototyping tools, presenting polished mockups and interactive prototypes.

Process Documentation:

• User Research & Synthesis: Evidence of conducting user research (interviews, surveys, usability testing) and effectively synthesizing findings into actionable design insights.

• Interaction Design & Wireframing: Detailed examples of wireframes, user flows, and interaction design specifications that illustrate your approach to structuring complex information and guiding user journeys.

• Iterative Design: Showcasing how you iterated on designs based on feedback, testing, and evolving requirements, demonstrating flexibility and a commitment to refinement.

• Collaboration & Handoff (or lack thereof): Examples of how you collaborated with engineering and product teams, emphasizing the "no handoff" philosophy by showing integrated workflows.

📝 Enhancement Note: The portfolio requirements are heavily weighted towards demonstrating experience with complex B2B software and AI-driven interfaces. Candidates must clearly articulate their process and rationale, showcasing how they handle intricate problems and collaborate with development teams.

💵 Compensation & Benefits

Salary Range: For a Senior Product Designer in Heidelberg, Germany, with 7+ years of experience in complex B2B software and AI design, a competitive salary range would typically fall between €75,000 and €100,000 annually, potentially higher for exceptional candidates with highly relevant specialized experience. This estimate considers the cost of living in Heidelberg, the senior level of the role, and the specialized nature of the work in enterprise AI and semantic intelligence.

Benefits:

• Competitive Compensation: Fair and attractive pay structure reflecting the seniority and impact of the role.

• Stock Options/Equity: (Likely, given it's a GmbH and likely venture-backed) Potential for equity participation, offering a stake in the company's growth.

• Health Insurance: Comprehensive health insurance coverage, in line with German employment standards.

• Retirement Savings Plan: Contributions to a company-sponsored retirement savings plan.

• Professional Development: Opportunities for continuous learning, attending conferences, and skill enhancement relevant to product design, AI, and enterprise software.

• Full Transparency: Access to company performance, strategic direction, and decision-making processes, fostering an environment of trust and shared understanding.

• Team Investment: A team deeply invested in the company's mission and committed to high-quality work.

Working Hours: The standard working hours are likely 40 hours per week, aligning with German labor laws. While the role is on-site, there might be flexibility in daily start and end times, allowing for adaptation to personal schedules while ensuring core collaboration hours are met.

📝 Enhancement Note: Salary estimation is based on typical German market rates for senior-level design roles in tech hubs like Heidelberg, adjusted for the specialized B2B/AI focus. Benefits are inferred from common offerings in tech startups and GmbH structures, with an emphasis on the "full transparency" mentioned.

🎯 Team & Company Context

🏢 Company Culture

Industry: Enterprise Software, AI, Semantic Intelligence, Data Management. Cirql One operates at the intersection of foundational enterprise data systems (like SAP) and the burgeoning field of AI, aiming to make complex business data understandable and actionable for AI.

Company Size: The company is likely in a growth phase, indicated by the need for a Senior Product Designer to "shape the interfaces" and "do it at the ground floor." This suggests a team that is small enough for significant impact but growing deliberately to scale its operations.

Founded: Founded with a clear mission to address the "deceptively hard" problem of connecting enterprise data to AI. The company's origin story is rooted in deep experience with enterprise environments and a conviction about the necessity of explicit business meaning.

Team Structure:

• The design team is likely small and integrated directly into product development pods.

• Reporting structure is probably flat, with the Senior Product Designer reporting to a Head of Product or directly to the founders, emphasizing direct collaboration and minimal hierarchy.

Methodology:

• Data-Driven Design: User research, usability testing, and analytics will inform design decisions.

• Iterative Development: A focus on shipping MVPs and iterating based on user feedback and performance data.

• Agile & Collaborative: Close collaboration with engineering and product teams, likely using agile methodologies.

• Mission-Oriented: A strong focus on the company's mission to make enterprise intelligence legible for AI.

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

📝 Enhancement Note: The company culture appears to be mission-driven, craft-focused, and highly collaborative. The emphasis on "ground floor" and "scaling deliberately" suggests an environment where early employees have significant influence and growth potential. The target audience of enterprise customers and AI developers implies a culture that values deep technical understanding and problem-solving.

📈 Career & Growth Analysis

Operations Career Level: This is a Senior Individual Contributor (IC) role, focused on deep expertise and direct impact within the product design domain. It's not a management track role initially, but the seniority implies potential for future leadership, such as Lead Designer or Design Manager, as the company scales.

Reporting Structure: The Senior Product Designer will likely report directly to a Head of Product or a founding team member responsible for product strategy. They will work closely with engineering leads and product managers within cross-functional teams.

Operations Impact: The design of the "enterprise semantic intelligence layer" is critical to the company's success. The Senior Product Designer's work directly influences how users (both human and AI) interact with and derive value from complex enterprise data, directly impacting the adoption and effectiveness of Cirql One's platform. This role is foundational to making the company's core value proposition tangible.

Growth Opportunities:

• Design Leadership: As the company grows, there will be opportunities to shape the design team, establish design systems, and mentor junior designers.

• Strategic Influence: Direct involvement in product strategy and roadmap discussions, influencing the direction of the company's offerings.

• Specialization: Deepen expertise in AI-driven interfaces, enterprise data semantics, and complex B2B SaaS design.

• Cross-Functional Development: Gain deeper understanding of AI development, data engineering, and enterprise business logic.

📝 Enhancement Note: This role offers substantial growth potential for a designer who thrives in a challenging, early-stage environment. The opportunity to define the user experience for a novel AI-centric enterprise platform is significant.

🌐 Work Environment

Office Type: The role is specified as "On-site," indicating a physical office presence is required in Heidelberg. This likely means a modern office space designed to foster collaboration and innovation.

Office Location(s): Heidelberg, Germany. This location offers a strong tech and research ecosystem, potentially attracting talent and fostering collaboration with local institutions.

Workspace Context:

• Collaborative Spaces: The office environment is expected to facilitate close collaboration between design, engineering, and product teams, with meeting rooms, whiteboarding areas, and open-plan workspaces conducive to teamwork.

• Technology & Tools: Access to state-of-the-art design software, hardware, and collaboration tools necessary for complex B2B and AI product design.

• Focus on Craft: A culture that values deep work, craftsmanship, and attention to detail in design and development.

• Direct Interaction: Opportunities for frequent, direct interaction with colleagues, founders, and potentially customers, fostering a tightly-knit team dynamic.

Work Schedule: Standard 40-hour work week, with potential for some flexibility in daily hours. The on-site requirement emphasizes in-person collaboration during core business hours.

📝 Enhancement Note: The on-site requirement suggests a company that values in-person collaboration and the benefits of co-located teams for rapid iteration and knowledge transfer, particularly critical in early-stage product development.

📄 Application & Portfolio Review Process

Interview Process:

• Initial Screening: A review of your resume and portfolio to assess qualifications and experience against the role requirements.

• Portfolio Presentation & Discussion: A dedicated session where you present 2-3 key case studies from your portfolio, detailing your process, rationale, and impact. Expect deep dives into your decision-making.

• Design Exercise/Challenge: Potentially a small, focused design exercise or a hypothetical problem to assess your problem-solving approach, systems thinking, and ability to translate complexity into design.

• Cross-Functional Interviews: Meetings with engineering leads, product managers, and potentially founders to assess technical collaboration skills, communication, and cultural fit.

• Final Interview: A concluding conversation, likely with a founder or senior leadership, to discuss strategic alignment, long-term vision, and overall fit.

Portfolio Review Tips:

• Curate Strategically: Select projects that best showcase your experience with complex B2B software, AI-driven interfaces, and end-to-end design processes.

• Tell a Story: For each case study, clearly articulate the problem, your role, your process, the challenges faced, your design decisions, and the outcomes/impact. Quantify results where possible.

• Highlight Rationale: Be prepared to explain why you made specific design choices, supported by research, user feedback, or strategic considerations.

• Showcase Collaboration: If possible, illustrate how you partnered with engineering and product teams, especially given the "no handoffs" philosophy.

• Address AI/Complexity: Explicitly address how you designed for complex data, AI collaboration, or enterprise-level challenges within your case studies.

Challenge Preparation:

• Understand the Problem Space: Research Cirql One's mission, target audience (enterprise data teams, AI developers), and the challenges of connecting enterprise data to AI.

• Think Systems: Prepare to think about how different components of a system interact and how design decisions impact the overall architecture and user experience.

• Practice Articulation: Rehearse explaining complex technical or design concepts clearly and concisely.

• Focus on Process: Demonstrate a structured approach to problem-solving, even in a short exercise.

📝 Enhancement Note: The interview process heavily emphasizes portfolio review and the ability to articulate design rationale and process, especially concerning complex B2B and AI applications. "No handoffs" implies a need to demonstrate collaborative problem-solving rather than just delivering final assets.

🛠 Tools & Technology Stack

Primary Tools:

• Design & Prototyping: Figma, Sketch, Adobe Creative Suite (Illustrator, Photoshop), InVision, Axure RP (or similar for advanced prototyping). Figma is a strong likelihood for collaborative, end-to-end design workflows.

• User Research & Testing: UserTesting.com, Maze, Lookback, or in-house tools for conducting remote and in-person usability studies. Survey tools like SurveyMonkey or Typeform.

• Collaboration & Project Management: Jira, Confluence, Asana, Trello, Slack.

Analytics & Reporting:

• While not a primary design tool, understanding how to interpret data from analytics platforms (e.g., Google Analytics, Amplitude, Mixpanel) to inform design decisions is beneficial.

CRM & Automation:

• Not directly applicable to the core design role, but an understanding of enterprise CRM systems (like Salesforce) and automation platforms can provide context for the "enterprise data" aspect.

📝 Enhancement Note: Proficiency with modern collaborative design tools like Figma is almost certainly expected. The emphasis on user research and data-informed design means familiarity with related tools is important.

👥 Team Culture & Values

Operations Values:

• Craftsmanship: A deep commitment to quality, detail, and excellence in design execution.

• Mission-Driven: A shared passion for solving a fundamental problem in enterprise AI and data.

• Collaboration: Valuing teamwork, open communication, and mutual support across disciplines.

• Transparency: Openness in communication about company progress, challenges, and decisions.

• User-Centricity: A dedication to understanding and serving the needs of enterprise users and AI developers.

• Problem-Solving: A proactive and analytical approach to tackling complex challenges.

Collaboration Style:

• Integrated Teams: Designers are embedded within cross-functional product teams, working tightly with engineers and product managers.

• Direct Communication: Emphasis on clear, direct, and frequent communication, both written and verbal.

• Feedback Culture: An environment where constructive feedback is encouraged and valued as a means of improving design and product.

• Shared Ownership: A sense of collective responsibility for the product's success, moving beyond individual task completion.

📝 Enhancement Note: The culture appears to be a blend of startup agility, a strong focus on technical craft, and a deep commitment to the company's ambitious mission. Collaboration is key, with an expectation of designers being integrated partners in the development process.

⚡ Challenges & Growth Opportunities

Challenges:

• Translating Extreme Complexity: Designing intuitive interfaces for highly complex enterprise data structures and AI logic requires significant cognitive effort and innovative thinking.

• Bridging Divergent User Needs: Balancing the needs of highly technical users (data engineers) with those of business stakeholders who may have less technical expertise.

• Designing for AI Collaboration: Establishing effective patterns for human-AI interaction that are reliable, trustworthy, and genuinely augment human capabilities.

• Establishing Design Foundations: As an early design hire, there's an opportunity and challenge to define the design system, processes, and culture for the company.

• Rapid Growth Environment: Navigating the inherent uncertainties and rapid pace of a growing startup.

Learning & Development Opportunities:

• Deep Domain Expertise: Gain unparalleled insight into enterprise data, semantic intelligence, and the practical application of AI in business.

• Cutting-Edge AI Design: Become a leader in designing for emerging AI capabilities and human-AI collaboration paradigms.

• Foundational Role: Contribute to building a product and company from the ground up, shaping its future.

• Cross-Disciplinary Learning: Work closely with world-class engineers and product strategists, absorbing knowledge across disciplines.

• Leadership Potential: Develop leadership skills through mentoring, process definition, and strategic input.

📝 Enhancement Note: The role presents significant intellectual challenges but also offers substantial opportunities for professional growth and impact, particularly for designers interested in the frontier of AI and enterprise data.

💡 Interview Preparation

Strategy Questions:

• "Describe a time you had to design for a highly complex data model or system. How did you approach understanding it, and what was your design strategy?" (Focus on your process for deconstructing complexity and your systematic approach).

• "How do you approach designing interfaces where humans and AI collaborate? What are the key principles you follow to ensure trust and effectiveness?" (Highlight your understanding of AI ethics, user control, and transparent AI behavior).

Company & Culture Questions:

• "What interests you most about Cirql One's mission to make enterprise meaning explicit for AI?" (Connect your passion to their core value proposition).

• "How do you see yourself contributing to a small, fast-paced, and collaborative team environment like ours?" (Showcase your teamwork, adaptability, and proactive attitude).

Portfolio Presentation Strategy:

• Structure for Clarity: For each case study, use a clear narrative: Problem -> Your Role -> Process -> Solution -> Impact.

• Show, Don't Just Tell: Use visuals (wireframes, mockups, prototypes) extensively. Explain your design decisions verbally.

• Emphasize Rationale & Trade-offs: Be ready to defend your choices and discuss why you chose one solution over another, acknowledging any trade-offs.

• Quantify Impact: If possible, present data or metrics that demonstrate the success of your designs. If not, articulate the qualitative impact clearly.

• Address the "Why": Clearly articulate why your design choices were appropriate for the specific problem and user context, especially concerning enterprise complexity and AI interaction.

📝 Enhancement Note: Preparation should focus on articulating your design process, rationale, and experience with complex B2B and AI-related challenges. Being able to "think out loud" and demonstrate systems thinking will be crucial.

📌 Application Steps

To apply for this Senior Product Designer position:

• Submit your application through the provided link on join.com.

• Curate Your Portfolio: Select 2-3 of your strongest case studies that best demonstrate your experience with complex B2B software, end-to-end design processes, and ideally, AI-assisted interfaces. Ensure each case study clearly outlines the problem, your process, your role, and the impact of your design.

• Tailor Your Resume: Highlight your 7+ years of product design experience, with specific emphasis on the 4+ years spent on complex B2B software. Use keywords from the job description such as "enterprise design," "systems thinker," "AI-first," and "collaboration."

• Prepare Your Presentation: Rehearse presenting your portfolio case studies, focusing on articulating your design rationale, process, and how you collaborate with engineering and product teams. Be ready to discuss challenges and solutions in detail.

• Research Cirql One: Understand their mission, product vision, target market, and the problem they are solving. This will help you tailor your application and interview responses to their specific context.

⚠️ 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.

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