UX / UI Designer - App & Web (m/w/d) - Vollzeit oder Teilzeit

📍 Job Overview

Job Title: UX / UI Designer - App & Web (m/w/d) - Full-time or Part-time

Company: Aufmaster GmbH

Location: Germany

Job Type: Full-time, Part-time

Category: Product Design / User Experience

Date Posted: 2026-01-08

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

Remote Status: Fully Remote

🚀 Role Summary

• Drive the user experience and interface design for Aufmaster's leading digital cable documentation app and its accompanying web application.

• Translate complex technical functionalities, including those from a unique smart cable length measuring device, into intuitive and user-friendly interfaces for skilled tradespeople and craftspeople.

• Collaborate closely within a product team, working alongside Product Managers, Developers, and Customer Success to iterate on designs and enhance user satisfaction.

• Contribute to the continuous improvement of the product's usability and overall user journey, directly impacting customer adoption and operational efficiency.

📝 Enhancement Note: The role is explicitly for UX/UI Design with a focus on mobile applications (Android & iOS) and a web application, emphasizing practical, real-world usability for a specific user demographic (tradespeople). The integration of a unique hardware component (smart measuring device) adds a layer of complexity and innovation to the design challenges.

📈 Primary Responsibilities

• Develop comprehensive UX concepts, including user flows, personas, wireframes, and interactive prototypes for both mobile apps and the web application.

• Plan and execute user tests, systematically collecting feedback and iteratively optimizing designs to enhance usability and user satisfaction.

• Maintain and evolve the Aufmaster Design System within Figma, ensuring consistency and scalability across all product interfaces.

• Collaborate effectively with the development team, managing design handoffs, providing feedback during implementation, and participating in iterative refinement cycles.

• Continuously analyze user behavior and customer feedback to identify areas for improvement and implement design solutions that enhance the overall user experience and operational efficiency.

• Optionally, support the marketing team by creating UI-adjacent visuals for marketing materials, website, and online advertising campaigns.

📝 Enhancement Note: The responsibilities highlight a full-cycle design process, from initial concept and research to implementation support and ongoing optimization. The optional marketing support indicates a broader scope for designers who wish to contribute beyond core product design.

🎓 Skills & Qualifications

Education: While not explicitly stated, a degree in Design, Human-Computer Interaction, or a related field is typically expected for roles requiring several years of experience.

Experience: Minimum of several years of professional experience in UX/UI design, with a strong emphasis on mobile application design.

Required Skills:

• Proven experience in UX/UI design, with a portfolio demonstrating expertise in mobile app and web application design.

• Proficiency in user-centered design principles and methodologies.

• Expertise in using Figma for wireframing, prototyping, and design system management.

• Experience conducting user research and user testing, with a demonstrated ability to translate findings into design improvements.

• Strong skills in developing user flows, personas, and wireframes.

• Excellent collaboration and communication skills, with the ability to work effectively in an interdisciplinary team.

Preferred Skills:

• Basic understanding of web technologies such as HTML, CSS, and ideally JavaScript.

• Experience with interactive prototyping tools beyond Figma.

• Familiarity with agile development methodologies.

📝 Enhancement Note: The requirement for "several years of experience" suggests a mid-level to senior-leaning role. The emphasis on Figma and user research/testing points to a need for practical, hands-on design skills rather than purely theoretical knowledge. Basic web technology understanding is a plus, indicating potential for cross-platform design considerations.

📊 Process & Systems Portfolio Requirements

Portfolio Essentials:

• A comprehensive portfolio showcasing a range of UX/UI design projects, with a clear emphasis on mobile applications.

• Demonstrate the end-to-end design process for at least one significant project, including research, ideation, wireframing, prototyping, user testing, and final UI.

• Evidence of contributions to or creation of a design system, highlighting consistency and scalability.

• Examples of iterative design improvements based on user feedback or data analysis, showing a commitment to continuous optimization.

Process Documentation:

• Detailed documentation of user flows and interaction designs for complex functionalities.

• Case studies illustrating the process of user research and testing, including methodologies and key findings.

• Examples of how design decisions were translated into development-ready specifications and collaborated on with engineers.

📝 Enhancement Note: A strong portfolio is critical for this role, as it's the primary method for evaluating a candidate's practical design skills and process. The emphasis on iterative design and user feedback suggests a need for candidates who can demonstrate adaptability and a data-informed approach to design.

💵 Compensation & Benefits

Salary Range: €55,000 - €62,000 per year.

Benefits:

• Employment Type: Permanent contract, available in full-time or part-time (minimum 3 days per week).

• Innovation Focus: Work on products that solve real-world problems and significantly improve customers' daily work lives.

• Growth & Development: Ample opportunities for professional and personal development, with increasing responsibility and new challenges.

• Team & Culture: Be part of a dedicated, interdisciplinary team with direct communication and short decision-making processes.

• Flexible Work Models: Flexible working hours and 100% home office for a healthy work-life balance.

• Ownership & Impact: High degree of personal responsibility, genuine influence on product direction, and the ability to guide projects from concept to launch.

Working Hours: The role is advertised as full-time, implying a standard 40-hour work week, with flexibility in scheduling. Part-time options (minimum 3 days/week) are also available.

📝 Enhancement Note: The provided salary range is competitive for a mid-level UX/UI Designer in Germany, especially considering the fully remote aspect. The benefits package emphasizes work-life balance, professional growth, and autonomy, which are attractive to experienced design professionals.

🎯 Team & Company Context

🏢 Company Culture

Industry: Technology (Software, Hardware Integration for Trades/Construction)

Company Size: The description mentions "1,000+ customers" and a "fast-growing tech company," suggesting a company that has achieved product-market fit and is in a scaling phase, likely with tens to a few hundred employees.

Founded: Not explicitly stated, but the description of a "fast-growing tech company" and "leading app" implies a company established enough to have a significant user base and product maturity.

Team Structure:

• The UX/UI Designer will be an integral part of the product team.

• Direct collaboration is expected with Product Management, Development, and Customer Success teams.

Methodology:

• User-Centric Design: Strong emphasis on understanding and designing for "real makers and craftspeople" and their daily workflows.

• Iterative Development: Continuous optimization based on feedback, user tests, and usage data is a core practice.

• Data-Driven Insights: Data generated from customer usage, including from the smart measuring device, informs design decisions.

• Agile Principles: Implied through close collaboration with development and iterative improvement cycles.

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

📝 Enhancement Note: Aufmaster appears to operate in a niche but critical market, blending software with specialized hardware. The company culture seems to value practical impact, direct communication, and employee autonomy, which is typical for successful tech startups or scale-ups.

📈 Career & Growth Analysis

Operations Career Level: This role is positioned as a Mid-Level UX/UI Designer. It requires several years of experience and the ability to work independently on design tasks, from concept to implementation support. The emphasis on ownership and direct impact suggests potential for growth into senior design or lead roles.

Reporting Structure: The UX/UI Designer will report to a Product Manager or Head of Product, working within a cross-functional product team. Direct collaboration with development leads and customer success managers is expected.

Operations Impact: The UX/UI Designer's work directly influences the adoption, usage, and customer satisfaction of Aufmaster's core product. By creating intuitive interfaces, they reduce user friction, improve efficiency for tradespeople, and contribute to the company's value proposition and competitive advantage in the market. Their designs are crucial for making complex technology accessible and valuable to the end-user.

Growth Opportunities:

• Senior Design Roles: Advance to Senior UX/UI Designer or Lead UX/UI Designer positions, taking on more complex projects and mentoring junior designers.

• Specialization: Deepen expertise in mobile UX, interaction design, or design systems.

• Product Strategy: Contribute more significantly to product strategy and roadmap planning as design expertise grows.

• Cross-Functional Learning: Gain deeper insights into software development, hardware integration, and customer success through close collaboration.

📝 Enhancement Note: The role offers a clear path for career progression within product design, with opportunities to take on greater responsibility and influence. The company's growth trajectory suggests that new leadership opportunities may emerge over time.

🌐 Work Environment

Office Type: The company offers 100% home office, indicating a fully remote work environment.

Office Location(s): While the company is based in Germany (implied by the job language and salary currency), the specific office location is less relevant due to the remote nature of the role. Candidates must be located within Germany for employment purposes.

Workspace Context:

• Remote Collaboration: The work environment is structured around remote collaboration tools and asynchronous communication, supplemented by synchronous meetings.

• Tools & Technology: Access to necessary design tools like Figma and collaboration platforms (e.g., Slack, Jira, Confluence) is expected.

• Team Interaction: Regular virtual team meetings, design reviews, and informal check-ins will facilitate interaction and knowledge sharing.

Work Schedule: Flexible working hours are offered, allowing employees to structure their workday to best suit their productivity and personal needs, while ensuring availability for team collaboration and core work activities.

📝 Enhancement Note: The 100% home office policy is a significant perk, offering maximum flexibility. Candidates should be comfortable with remote work dynamics and possess strong self-management skills.

📄 Application & Portfolio Review Process

Interview Process:

• Initial Screening: Review of CV and portfolio to assess experience and design skills.

• Portfolio Presentation/Design Challenge: A session where candidates present their portfolio, discuss their design process, and potentially tackle a small, relevant design challenge. This assesses problem-solving skills, communication, and design methodology.

• Team Interviews: Meetings with members of the product and development teams to evaluate cultural fit, collaboration style, and technical understanding.

• Final Interview: Discussion with a hiring manager or senior leader to finalize the offer.

Portfolio Review Tips:

• Curate Selectively: Showcase 2-3 of your strongest, most relevant projects that demonstrate your UX/UI process for mobile apps and web.

• Tell a Story: For each project, clearly articulate the problem, your role, your process (research, ideation, prototyping, testing), your design decisions, and the outcome or impact.

• Highlight Iteration: Show how you incorporated feedback or data to refine your designs.

• Figma Proficiency: Ensure your portfolio or presentation clearly demonstrates your Figma skills, including design system contributions if applicable.

• Focus on Impact: Quantify results where possible (e.g., improved conversion rates, reduced task completion time, positive user feedback).

Challenge Preparation:

• Be prepared to discuss your design process in detail and justify your decisions.

• Familiarize yourself with Aufmaster's product and target audience to tailor your responses and any potential design challenge.

• Practice articulating your thought process clearly and concisely, as if explaining to a developer or product manager.

📝 Enhancement Note: The emphasis on portfolio review and user-centric design suggests that interviewers will be looking for a candidate with a strong, demonstrable process and the ability to articulate design rationale effectively.

🛠 Tools & Technology Stack

Primary Tools:

• Figma: The core design tool for wireframing, prototyping, UI design, and managing the design system.

• Prototyping Tools: While Figma is primary, experience with other prototyping tools may be beneficial for specific use cases.

Analytics & Reporting:

CRM & Automation:

• Not directly relevant to the designer's core tasks, but awareness of how CRM systems and automation impact user journeys and data collection might be helpful.

📝 Enhancement Note: Proficiency in Figma is non-negotiable. Familiarity with user analytics platforms would be an advantage for a designer focused on data-informed iteration.

👥 Team Culture & Values

Operations Values:

• Customer Focus: A strong commitment to solving real problems for tradespeople and craftspeople, making their daily work easier and more efficient.

• Innovation: Developing unique solutions, such as the smart measuring device, and continuously improving the product.

• Efficiency: Designing intuitive workflows that save time and effort for users, reflecting an internal value for lean processes.

• Collaboration: Emphasizing teamwork, direct communication, and short decision-making paths.

• Ownership & Impact: Encouraging employees to take responsibility and have a tangible influence on the product and company.

Collaboration Style:

• Cross-functional Integration: Designers work closely with product, development, and customer success, fostering a holistic product development approach.

• Feedback Culture: Openness to feedback and iterative improvements is integral to the design and development process.

• Direct Communication: Emphasis on clear, concise communication to facilitate quick decision-making and problem-solving.

📝 Enhancement Note: The company culture appears to be a blend of startup agility and a focus on delivering tangible value to a specific, practical user base. This implies a pragmatic, results-oriented approach to work.

⚡ Challenges & Growth Opportunities

Challenges:

• Balancing Complexity and Simplicity: Designing intuitive interfaces for complex functionalities, especially those involving hardware integration and real-time data.

• Diverse User Needs: Catering to the specific needs and technical proficiencies of tradespeople and craftspeople.

• Remote Collaboration: Maintaining effective communication and design cohesion within a fully remote team.

• Rapid Growth: Adapting designs and processes to support a fast-growing user base and evolving product features.

Learning & Development Opportunities:

• Specialized Design Skills: Deepen expertise in mobile UX, interaction design, and design systems.

• Hardware-Software Integration: Gain unique insights into designing for products that combine physical hardware with software interfaces.

• Product Strategy Input: Contribute to strategic product discussions and roadmap planning.

• Mentorship: Potential to mentor junior designers as the team grows.

📝 Enhancement Note: The challenges presented are typical of innovative tech companies working at the intersection of hardware and software, offering significant learning potential for a motivated designer.

💡 Interview Preparation

Strategy Questions:

• "Describe a complex technical feature you designed for a mobile app. What was your process, and how did you ensure user understandability?" (Focus on user-centric process, simplification of complexity, and testing).

• "How do you approach designing for a user base that might have varying technical skills, like tradespeople?" (Highlight empathy, user research, iterative testing, and clear UI patterns).

Company & Culture Questions:

• "What interests you about Aufmaster's mission and product?" (Research the company website, product demos, and target market).

• "How do you contribute to a collaborative team environment, especially in a remote setting?" (Emphasize communication, proactive engagement, and knowledge sharing).

Portfolio Presentation Strategy:

• Structure: Begin with an overview of Aufmaster and your understanding of their user base. Then, present 2-3 key projects sequentially.

• Deep Dive: For each project, clearly articulate the problem, your role, your process (wireframes, user flows, prototypes, testing), key design decisions, and the results or learnings.

• Visuals: Use clear, high-quality visuals and interactive prototypes where possible.

• Conciseness: Be mindful of time; focus on the most impactful aspects of your work. Be prepared for follow-up questions.

📝 Enhancement Note: Expect interviewers to probe deeply into your design process, problem-solving abilities, and how you collaborate. Demonstrating an understanding of Aufmaster's specific market and user needs will be a significant advantage.

📌 Application Steps

To apply for this UX/UI Designer position:

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

• Curate Your Portfolio: Ensure your portfolio prominently features mobile app design projects and clearly illustrates your UX/UI process. Tailor the selection to highlight experience relevant to complex technical products and user-centric design.

• Optimize Your Resume: Highlight key skills and experiences that align with the job description, such as Figma proficiency, user testing, and mobile app design. Use keywords from the job posting naturally.

• Prepare Your Presentation: Practice walking through your portfolio projects, focusing on your design rationale, process, and the impact of your work. Be ready to discuss your experience with user research and iterative design.

• Research Aufmaster: Familiarize yourself with Aufmaster's product, target audience, and company mission to articulate your interest and align your responses with their values and goals.

⚠️ 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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