Senior Product Designer

📍 Job Overview

Job Title: Senior Product Designer

Company: Cello

Location: Germany (Remote)

Job Type: Full-Time

Category: Product Design / GTM Operations Enablement

Date Posted: 2026-07-28

Experience Level: Senior (5-10 years)

Remote Status: Fully Remote

🚀 Role Summary

• Drive end-to-end product design for Cello's core user experience, focusing on embedded UI that feels native within client products.

• Collaborate closely with founding designer, product management, and engineering to translate complex problems into intuitive, shipped solutions.

• Enhance and evolve the company's design system, ensuring consistency and scalability across all product touchpoints.

• Contribute to a high-craft, detail-oriented design culture within a remote-first, async-first startup environment.

• Play a key role in shaping user-centric product strategies that support Cello's mission of enabling user-led growth.

📝 Enhancement Note: While the role is Senior Product Designer, its focus on embedding UI into other products and enabling user-led growth through referrals positions it closely aligned with GTM Operations Enablement. The emphasis on systems thinking and the impact on customer acquisition channels suggests a strong connection to revenue generation and operational efficiency for Cello's clients.

📈 Primary Responsibilities

• Partner directly with the founding designer, product managers, and engineers to shepherd product initiatives from initial concept and problem definition through to successful launch.

• Proactively identify and implement improvements across existing product areas, addressing both significant functional overhauls and smaller quality-of-life enhancements.

• Contribute to the definition, refinement, and maintenance of Cello's evolving design system, ensuring its robustness and usability.

• Translate Cello's brand identity into compelling visual assets and experiences across marketing collateral, social media content, and product launch materials.

• Create detailed low and high-fidelity mockups and interactive prototypes to effectively communicate design concepts, user flows, and functional specifications.

• Actively participate in and contribute to the development of a strong, collaborative design culture within a growing remote team.

• Meticulously refine the details of embedded UI components to ensure they instill trust and a seamless user experience within third-party applications.

📝 Enhancement Note: The responsibilities highlight a strong emphasis on the full product design lifecycle, from problem identification to iteration. The "sweat the details" aspect for embedded UI is critical for GTM success, as it directly impacts client adoption and user trust, which are key drivers for referral programs.

🎓 Skills & Qualifications

Education: While no specific degree is mandated, a strong portfolio demonstrating mastery in product design principles is paramount. Candidates with degrees in Design, HCI, Computer Science, or related fields may have a foundational advantage.

Experience: A minimum of 5-10 years of proven software design experience, with a significant portion focused on product design within a professional setting. Experience in a fast-paced startup environment is highly valued.

Required Skills:

• Solid and proven software design experience, with a portfolio showcasing end-to-end product design work.

• Demonstrated experience designing for SaaS businesses; a breadth of experience across different product types is also considered.

• Versatility in craft: ability to comfortably operate across visual design, product thinking, brand expression, and interaction design.

• Proficient systems thinking: ability to design components and patterns within a broader system context, with the capacity to innovate beyond conventional approaches.

• Strong collaboration and communication skills, essential for an async-first, remote work environment.

• Fluency in Figma and other industry-standard prototyping tools, with a willingness to experiment with new tooling.

• Courage and ability to challenge ideas, embrace experimentation, and drive product direction forward.

• Comfort and adaptability in a fast-paced startup environment with potentially shifting priorities. Preferred Skills:

• Previous in-house design experience, particularly within a startup context.

• Agency experience, providing exposure to diverse client needs and project types.

• Experience with growth-focused product features or platforms, such as referral programs or user engagement tools.

• Familiarity with front-end development principles (HTML, CSS, JavaScript) to better collaborate with engineering teams.

📝 Enhancement Note: The experience requirements are geared towards a senior individual capable of independent work and strategic contribution. The emphasis on "systems thinking" and "breadth of craft" indicates a need for a designer who can see the bigger picture and adapt their skills across multiple design disciplines, crucial for a product embedded within various client ecosystems.

📊 Process & Systems Portfolio Requirements

Portfolio Essentials:

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

• Each case study should clearly articulate the problem, your role and contributions, the design process (research, ideation, prototyping, testing), and the final solution.

• Highlight examples of systems thinking, particularly how designs integrate into larger product ecosystems or design systems.

• Include specific examples of visual design, interaction design, and user flows.

• Demonstrate experience with Figma and other prototyping tools through interactive prototypes or detailed walkthroughs.

• Quantify impact where possible, using metrics related to user engagement, conversion, or client success. Process Documentation:

• Case studies should detail the process for defining product requirements and user needs, especially for features intended for integration into other platforms.

• Illustrate the approach to iterating on designs based on feedback from product, engineering, and potentially client stakeholders.

• Document the methodology for contributing to or evolving a design system, including component design and pattern definition.

• Showcase how brand elements are considered and integrated into the product design process.

📝 Enhancement Note: A robust portfolio is essential for this role, as it serves as the primary evidence of the candidate's ability to handle complex design challenges and contribute to a high-craft product. The emphasis on systems thinking and embedded UI means case studies demonstrating integration and adaptability will be highly valued.

💵 Compensation & Benefits

Salary Range: Based on industry benchmarks for Senior Product Designers in Germany and other specified European countries (Poland, UK, Portugal, Spain) with a CET +/-3 hours overlap requirement, a competitive salary range is estimated between €70,000 - €100,000 annually, depending on experience and specific location within the eligible regions.

Benefits:

• Remote-first work environment with flexibility for focused work.

• Competitive salary package.

• Employee Stock Options (eVSOPS), offering a stake in Cello's growth.

• Regular in-person team off-sites to foster connection and collaboration.

• Backing from leading Venture Capital firms (HV Capital, byFounders, Notion Capital), indicating strong financial stability and growth potential.

• Opportunity to work with cutting-edge technology in the user referral and growth space.

Working Hours: Full-time, with an expectation of comfortable overlap with a European work day (CET +/-3 hours). Cello operates on an async-first culture, valuing deep, focused work, but also encourages synchronous collaboration when needed.

📝 Enhancement Note: The salary estimate is based on research for senior-level design roles in Western and Central Europe, accounting for the specified remote work requirements and the CET timezone overlap. The benefits package emphasizes equity, team cohesion, and the financial backing of reputable VCs, which are attractive to senior talent in the startup ecosystem.

🎯 Team & Company Context

🏢 Company Culture

Industry: Technology, specifically focused on SaaS for growth and referral marketing. Cello operates in a B2B SaaS space, providing infrastructure that enables other businesses to leverage their user base for customer acquisition. This positions them at the intersection of product development, marketing technology, and growth hacking.

Company Size: Small, remote-first team. This implies a highly collaborative, agile environment where individuals have significant impact and ownership. It also suggests that processes are still evolving, offering opportunities to shape them.

Founded: While the exact founding date isn't provided, Cello is a relatively young company, evidenced by its startup environment and backing by prominent VCs. This implies a dynamic, growth-oriented culture.

Team Structure:

• The design team is small, working closely with founding members, product managers, and engineers. This means direct access to leadership and cross-functional collaboration is high.

• The reporting structure likely involves reporting to the Founding Designer or Head of Product, with a strong emphasis on peer collaboration rather than strict hierarchy.

• Cross-functional collaboration is central, with designers working intimately with product and engineering to bring features to life. The remote, async-first nature necessitates clear communication and documentation. Methodology:

• Data analysis and insights are crucial for understanding user behavior and the effectiveness of referral programs, informing design decisions.

• Workflow planning and optimization are key, as Cello's product is designed to automate and streamline growth processes for their clients.

• Automation and efficiency practices are core to Cello's value proposition, and this ethos is likely reflected in their internal operations and product development.

Company Website: https://cello.so/

📝 Enhancement Note: The company's focus on enabling "hyper growth" through referrals means that design decisions are directly tied to business outcomes and revenue generation for their clients. This operational perspective is critical for candidates to understand. The "high bar for craft and attention to detail" is a key cultural indicator for this role.

📈 Career & Growth Analysis

Operations Career Level: This role is positioned as a Senior Product Designer, indicating a level of expertise and autonomy. It's a position where individuals are expected to not only execute but also influence design strategy and process. For someone interested in the operational impact of design, this role offers a chance to shape how businesses acquire customers.

Reporting Structure: The Senior Product Designer will report to the founding designer and work closely with product and engineering teams. This close-knit structure allows for direct mentorship and learning from experienced individuals.

Operations Impact: The work directly impacts Cello's ability to provide a seamless and effective referral program infrastructure for its clients (e.g., Bolt, Miro, Typeform). By ensuring the embedded UI is trustworthy and user-friendly, the designer contributes to the client's success, which in turn drives Cello's growth and adoption. This role is about designing the "engine" that powers client acquisition.

Growth Opportunities:

• Operations Skill Development: Gain deep insights into growth loops, referral mechanics, and user acquisition strategies by working on a product specifically designed for this purpose.

• Design System Leadership: Opportunity to take significant ownership and influence the evolution of a critical design system for a growing SaaS product.

• Cross-Functional Influence: Develop strong collaboration skills and influence product direction by working closely with founding members, product, and engineering in an agile environment.

• Career Progression: Potential to move into a Lead Product Designer role, manage junior designers, or specialize further in growth design or product infrastructure.

📝 Enhancement Note: The growth opportunities are framed around developing skills directly relevant to operations and GTM strategy, such as understanding growth loops and influencing product adoption, which are key for operations professionals.

🌐 Work Environment

Office Type: Remote-first. This means the primary work environment is digital, with a strong emphasis on asynchronous communication and tools that facilitate collaboration across distances.

Office Location(s): While fully remote, the role requires the candidate to be located within CET +/-3 hours. This includes countries like Germany, Poland, Portugal, Spain, and the United Kingdom, ensuring comfortable overlap with European business hours for synchronous communication and team activities.

Workspace Context:

• The workspace is digital, leveraging tools for communication, project management, and design collaboration. Emphasis is placed on deep, focused work.

• Operations tools and technology will include Figma for design, likely a project management tool (e.g., Jira, Asana), and communication platforms (e.g., Slack, Notion).

• Opportunities for team interaction will occur through scheduled video calls, design critiques, and regular team off-sites, fostering a sense of community despite the remote setup.

Work Schedule: Flexible within the defined European time zone overlap. The async-first culture allows for autonomy in managing one's schedule, prioritizing deep work sessions while ensuring availability for key collaborative moments.

📝 Enhancement Note: The requirement for CET +/-3 hours is a significant operational constraint for a remote role, ensuring team cohesion and efficient collaboration for a product that needs to be deeply integrated with client operations.

📄 Application & Portfolio Review Process

Interview Process:

• Application Submission: Submit CV and a portfolio link.

• Portfolio Review: Initial screening will focus on the quality and relevance of the portfolio, looking for systems thinking, craft, and end-to-end product design examples.

• Initial Call: A conversation with a member of the design or product team to discuss experience, motivations, and cultural fit.

• Design Exercise/Case Study Presentation: Candidates may be asked to complete a small design exercise or present a deep dive into one of their portfolio case studies, focusing on their process, rationale, and impact. This will likely involve discussing how their design decisions supported business goals or user adoption.

• Team Interviews: Interviews with engineering and product team members to assess collaboration skills, technical understanding, and alignment with Cello's culture.

• Founding Designer/Leadership Interview: A final conversation to discuss strategic vision, design leadership potential, and overall fit with the company's direction.

Portfolio Review Tips:

• Prioritize Impact: For each case study, clearly articulate the problem, your solution, and the quantifiable impact or outcome achieved. For Cello, focus on how your design drove user engagement, adoption, or client success.

• Showcase Systems Thinking: Dedicate sections to explaining how your designs fit into a larger system, how you considered scalability, and how you contributed to or utilized a design system.

• Detail Your Process: Be explicit about your research, ideation, prototyping, and iteration steps. Explain the why behind your design decisions.

• Highlight Collaboration: If possible, show examples of how you collaborated with product managers, engineers, or other stakeholders.

• Visual Storytelling: Ensure your portfolio is visually engaging and easy to navigate. Use high-fidelity mockups and interactive prototypes where appropriate.

Challenge Preparation:

• Be prepared to discuss your approach to designing for embedded experiences and the unique challenges this presents.

• Understand Cello's product and its value proposition – how does it help businesses turn users into acquisition channels?

• Practice articulating how design directly contributes to business growth and operational efficiency.

• Be ready to discuss your experience with design systems and how you maintain consistency and scalability.

• Prepare to demonstrate your comfort with ambiguity and rapid iteration in a startup environment.

📝 Enhancement Note: The interview process emphasizes a deep dive into the candidate's design process, strategic thinking, and ability to deliver impactful results, which are crucial for a role influencing client growth and operational efficiency.

🛠 Tools & Technology Stack

Primary Tools:

• Figma: The core tool for all design activities, from wireframing and prototyping to high-fidelity visual design and component creation. Proficiency is essential.

• Prototyping Tools: While Figma is primary, familiarity with other prototyping tools (e.g., Principle, ProtoPie) may be beneficial for specific interactions.

• Design System Management: Experience with tools or methodologies for managing and scaling design systems (e.g., Storybook, Zeroheight) is a plus.

Analytics & Reporting:

• Product Analytics Tools: Familiarity with tools like Amplitude, Mixpanel, or Google Analytics for understanding user behavior, feature adoption, and conversion rates. This is crucial for data-driven design iterations.

• Data Visualization Tools: Experience with tools like Tableau or Looker, or even advanced Excel/Google Sheets, to interpret data and present findings.

CRM & Automation:

• While not a direct design tool, understanding how CRM systems (e.g., Salesforce, HubSpot) and marketing automation platforms function can provide valuable context for designing referral and growth programs that integrate with client sales and marketing operations.

📝 Enhancement Note: The emphasis on Figma and design systems is standard for senior product designers. The inclusion of product analytics tools highlights the data-driven nature of the role and its connection to measuring operational impact and growth metrics.

👥 Team Culture & Values

Operations Values:

• High Craft & Attention to Detail: A fundamental value, driven by the need for embedded UI to feel native and trustworthy within client products. This translates to meticulous design execution and a commitment to quality.

• Systems Thinking: Designing components and patterns that work cohesively within a larger product ecosystem and can scale effectively. This is crucial for building robust infrastructure.

• User-Centricity & Growth Orientation: A deep understanding of user needs and how design can directly drive business growth, particularly through referral and acquisition channels.

• Collaboration & Communication: Essential for a remote, async-first team. Values open communication, constructive feedback, and proactive engagement.

• Ownership & Autonomy: Team members are empowered to take ownership of their work, drive initiatives, and make decisions.

Collaboration Style:

• Async-First: Communication is primarily asynchronous, relying on clear documentation, written updates, and thoughtful contributions to shared platforms (e.g., Notion, Slack).

• Deep Focused Work: The culture supports extended periods of uninterrupted work, essential for complex design tasks.

• Intentional Synchronicity: While async is preferred, the team values intentional synchronous interactions for brainstorming, problem-solving, and relationship-building, especially during off-sites.

• Feedback-Rich Environment: Encourages constructive feedback loops between design, product, and engineering to ensure the best outcomes.

📝 Enhancement Note: The cultural values directly support the operational goals of Cello – building robust, scalable infrastructure that drives growth for clients. The emphasis on "high craft" and "systems thinking" is particularly relevant for a role that interfaces with multiple external product environments.

⚡ Challenges & Growth Opportunities

Challenges:

• Designing for Embedded Experiences: Ensuring UI feels native and trustworthy across a wide variety of client products and contexts presents a unique design challenge.

• Balancing Systemic Design with Innovation: Maintaining consistency within the design system while also pushing boundaries and innovating for competitive advantage requires careful judgment.

• Async Communication Overhead: Effectively collaborating and making progress in a remote, async-first environment requires strong communication discipline and clear documentation.

• Rapid Startup Environment: Navigating shifting priorities and high stakes in a fast-paced startup can be demanding but also rewarding.

Learning & Development Opportunities:

• Deep Dive into Growth Mechanics: Gain unparalleled insight into referral programs, viral loops, and user acquisition strategies by working on Cello's core product.

• Advanced Design Systems: Contribute to and learn from the development of a sophisticated design system for a SaaS product.

• Cross-Functional Expertise: Develop strong relationships and understanding with product management and engineering, enhancing skills in collaborative product development.

• Industry Exposure: Work with a client base of leading tech companies, gaining exposure to their growth and product strategies.

📝 Enhancement Note: The challenges and growth opportunities are framed around developing expertise in growth operations and product infrastructure, making the role attractive to those looking to deepen their understanding of business drivers through design.

💡 Interview Preparation

Strategy Questions:

• "How would you approach designing a referral program feature that needs to feel native within a client's existing SaaS application, considering potential UI/UX inconsistencies?" (Prepare to discuss user research, pattern adaptation, and iterative design based on client feedback.)

• "Describe a time you had to balance the needs of a design system with the desire to innovate a specific product feature. What was your process and outcome?" (Focus on trade-offs, decision-making, and impact.)

• "Given Cello's mission to turn users into acquisition channels, how would you measure the success of a new feature you designed from a growth and operational perspective?" (Think about key metrics like referral rates, conversion, user adoption, and client retention.) Company & Culture Questions:

• "What interests you most about Cello's mission and product? How do you see your design skills contributing to our goal of enabling user-led growth?" (Research Cello's website and product offerings thoroughly.)

• "How do you adapt your design process to work effectively in a remote, async-first environment?" (Discuss your communication strategies, documentation habits, and experience with collaboration tools.)

• "Describe your experience working with engineering and product teams. How do you ensure alignment and effective collaboration?" (Provide examples of constructive conflict resolution and shared goal achievement.) Portfolio Presentation Strategy:

• Structure for Impact: Organize your presentation around 2-3 key case studies that best demonstrate your skills in systems thinking, end-to-end design, and driving growth.

• Storytelling: Frame each case study as a narrative: the problem, your role, your process, the solution, and the impact. Clearly articulate the why behind your decisions.

• Quantify Results: Wherever possible, use data and metrics to showcase the success of your designs. For Cello, this could include engagement rates, conversion improvements, or client feedback.

• Highlight Systems Thinking: Explicitly discuss how your designs integrated into larger systems, how you considered scalability, and your contribution to design systems.

• Showcase Craft: Present high-fidelity mockups and interactive prototypes that clearly illustrate your visual and interaction design skills.

• Be Prepared for Deep Dives: Anticipate questions about specific design choices, alternative solutions you considered, and how you handled constraints.

📝 Enhancement Note: The interview preparation focuses on assessing the candidate's ability to apply design principles to operational goals, specifically around growth and embedded experiences, which are central to Cello's value proposition.

📌 Application Steps

To apply for this Senior Product Designer position:

• Submit your application through the provided link on Ashby.

• Portfolio Customization: Tailor your portfolio to highlight case studies demonstrating systems thinking, end-to-end product design ownership, and experience with SaaS or embedded UI. Focus on projects where your design directly influenced user adoption or business growth.

• Resume Optimization: Ensure your resume clearly articulates your years of experience, key skills (Figma, UI/UX, Systems Thinking, SaaS), and achievements, using keywords relevant to product design and growth operations.

• Interview Preparation: Practice articulating your design process, rationale, and impact, especially for questions related to embedded experiences, design systems, and data-driven decision-making. Prepare to discuss your approach to remote, async collaboration.

• Company Research: Thoroughly research Cello's product, mission, and target market. Understand how their referral and embedded UI solutions drive operational efficiency and growth for their clients. Familiarize yourself with their "People Playbook" to understand their culture and values.

⚠️ 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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