Senior Product Designer

📍 Job Overview

Job Title: Senior Product Designer

Company: Cello

Location: Germany

Job Type: FULL_TIME

Category: Product Design / GTM Operations Support

Date Posted: 2026-09-11

Experience Level: 5-10 years

Remote Status: Remote Solely

🚀 Role Summary

• Drive end-to-end product design for Cello's core user experience, from initial problem identification to final shipped solution, leveraging strong product thinking and systems design capabilities.

• Collaborate closely with founding designer, product managers, and engineers to translate complex user needs and business objectives into intuitive and impactful user interfaces and workflows.

• Contribute to the evolution and enhancement of Cello's design system, ensuring consistency, scalability, and adherence to brand guidelines across all product touchpoints.

• Support GTM initiatives by designing marketing collateral, social media content, and launch assets that effectively communicate Cello's value proposition and brand identity.

📝 Enhancement Note: While this role is primarily a Product Designer position, the emphasis on "embedded UI," "systems thinking," and "helping businesses turn their users into their best acquisition channel" strongly suggests a need for design operations support. The candidate will likely interface with GTM strategies and contribute to the product's ability to drive growth, making 'GTM Operations Support' a relevant secondary category.

📈 Primary Responsibilities

• Partner directly with the founding designer, product, and engineering teams to drive product initiatives from concept through to successful deployment, ensuring alignment with strategic goals.

• Conduct user research, usability testing, and competitive analysis to identify user pain points and opportunities for product improvement, translating insights into actionable design solutions.

• Design and iterate on low-fidelity wireframes, high-fidelity mockups, and interactive prototypes to effectively communicate design concepts and user flows to stakeholders.

• Contribute to the definition, refinement, and maintenance of Cello's design system, including UI components, patterns, and style guides, ensuring consistency and scalability.

• Develop and refine visual design elements, including typography, color palettes, and iconography, to ensure a cohesive and trustworthy user experience that feels native within client products.

• Collaborate with marketing and growth teams to design compelling brand assets for various channels, including social media, website, and launch campaigns, reinforcing Cello's brand identity.

• Proactively identify and address quality issues and areas for improvement within existing product features, demonstrating a commitment to continuous enhancement.

• Actively participate in and contribute to the development of Cello's design culture, fostering a collaborative and innovative environment.

📝 Enhancement Note: The responsibility to "sweat the details that make embedded UI feel trustworthy" and the company's mission to "turn users into their best acquisition channel" implies a need for the designer to deeply understand user psychology and behavioral economics as applied to referral programs. This extends beyond typical UI/UX to influence user adoption and advocacy strategies.

🎓 Skills & Qualifications

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

Experience: 5-10 years of proven software design experience, with a strong emphasis on product design within SaaS environments. Agency experience is considered a plus.

Required Skills:

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

• Demonstrated experience designing for SaaS businesses, with the ability to adapt to diverse product types.

• Breadth of craft: Proficiency across visual design, product thinking, brand identity, and interaction design.

• Strong systems thinking capabilities: Ability to design components and patterns that integrate seamlessly into a broader system, with the capacity to innovate beyond convention.

• Fluency in using Figma and other industry-standard prototyping tools (e.g., Principle, ProtoPie).

• Excellent collaboration and communication skills, adept at working within an async-first culture.

• Comfort and adaptability in a fast-paced startup environment with high stakes and evolving priorities. Preferred Skills:

• Experience working in both in-house (especially startup) and agency settings.

• Familiarity with user research methodologies and usability testing.

• Experience contributing to or evolving design systems.

• Understanding of growth loops and referral program mechanics.

• Basic understanding of front-end development principles (HTML, CSS, JavaScript) to facilitate collaboration with engineering.

📝 Enhancement Note: The "5-10 years" experience level, combined with the "Senior" title and the need for "systems thinking" and "end-to-end ownership," indicates that candidates should be prepared to demonstrate strategic design leadership and a deep understanding of product development lifecycles, not just execution.

📊 Process & Systems Portfolio Requirements

Portfolio Essentials:

• A curated collection of case studies demonstrating end-to-end product design ownership, from problem definition to shipped solutions.

• Projects showcasing experience with SaaS products, highlighting user-centric design principles and business impact.

• Examples of systems thinking, illustrating how individual components and patterns integrate into a cohesive and scalable product.

• Demonstrations of visual design craft and interaction design expertise, including mockups and prototypes.

• Evidence of contributions to or management of design systems, including component libraries and style guides. Process Documentation:

• Case studies that clearly articulate the problem statement, design process, key decisions, and measurable outcomes.

• Documentation of how user research and feedback were integrated into the design process to drive iterative improvements.

• Examples of collaboration with product management and engineering teams, detailing workflow and communication strategies.

• Visualizations of user flows, wireframes, and prototypes that effectively communicate complex ideas.

📝 Enhancement Note: Given the company's focus on "infrastructure that lives in other people's products" and the high bar for "craft and attention to detail," portfolios should emphasize the designer's ability to create UI that feels native and trustworthy across diverse contexts. The ability to trace how design decisions play out across different user segments and product levels will be critical.

💵 Compensation & Benefits

Salary Range: An estimated annual salary range for a Senior Product Designer in Germany, with 5-10 years of experience and remote work in CET +/-3 hours, would typically fall between €70,000 and €95,000. This range is based on industry benchmarks for senior design roles in tech companies in Germany, considering the company's backing by leading VCs and its focus on a high-growth product.

Benefits:

• Competitive salary package.

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

• Regular in-person team off-sites for strategic planning, team building, and cultural immersion.

• Support from leading VCs (HV Capital, byFounders, Notion Capital), indicating a well-funded and ambitious venture.

• Remote-first work environment within a European timezone overlap.

Working Hours: 40 hours per week, with flexibility inherent in an async-first culture, requiring comfortable overlap with a European work day (CET +/-3 hours).

📝 Enhancement Note: The salary estimate is derived from publicly available data for Senior Product Designer roles in Germany, adjusted for the remote aspect and the specific tech/startup sector. The eVSOPS are a significant component of compensation in early-stage startups, reflecting the high-growth potential and the desire to align employee success with company success.

🎯 Team & Company Context

🏢 Company Culture

Industry: Technology / SaaS / Growth Infrastructure. Cello operates in the burgeoning market of product-led growth and customer advocacy, providing tools that embed referral and loyalty programs directly into other companies' products. This niche requires a deep understanding of user behavior and the dynamics of viral growth.

Company Size: Small, remote-first team. This implies a flat hierarchy, direct impact for each team member, and a need for individuals who are self-motivated and can thrive with autonomy.

Founded: The founding date is not specified, but the company is backed by leading VCs, suggesting it is in a growth phase, likely post-seed or Series A. This implies a dynamic environment where processes are still being defined and refined.

Team Structure:

• The design team is led by a founding designer, with this Senior Product Designer working in close partnership.

• Collaboration extends across product management and engineering, forming cross-functional pods for feature development.

• The culture is described as "async-first," prioritizing deep, focused work but also valuing in-person connection through regular off-sites. Methodology:

• Emphasis on "craft and attention to detail" due to building infrastructure that lives within other products.

• Systems thinking is paramount for designing components and tracing decision impacts across user segments and product levels.

• Decisions are "scrutinized by the world's best growth, design and engineering teams," indicating a high standard for quality and strategic thinking.

• The product aims for "hyper growth that runs on autopilot," highlighting a focus on scalable and automated solutions.

Company Website: https://cello.so/

📝 Enhancement Note: The "remote-first" and "async-first" culture, coupled with the need for "deep focused work," suggests that candidates should be proficient in asynchronous communication tools and methodologies, and comfortable managing their time effectively without constant direct supervision.

📈 Career & Growth Analysis

Operations Career Level: This role is positioned as a Senior Product Designer, indicating a mid-to-senior level position within the design function. The individual is expected to take ownership of projects end-to-end, contribute to the design system, and mentor or influence junior designers as the team grows. The role requires not just execution but also strategic input into product direction.

Reporting Structure: The Senior Product Designer will partner directly with the founding designer, suggesting a collaborative leadership dynamic. They will also work closely with product and engineering teams, implying a matrixed reporting structure for project work.

Operations Impact: The Senior Product Designer's work will directly influence Cello's core product experience, which is the engine for its GTM strategy. By improving the user experience of embedding referrals and loyalty programs, the designer will directly contribute to customer acquisition, retention, and overall platform growth. Their contributions to the design system will also ensure scalability and efficiency for future product development.

Growth Opportunities:

• Design Leadership: As the company and design team scale, there will be opportunities to take on more leadership responsibilities, potentially managing other designers or leading specific product areas.

• Specialization: Deepen expertise in growth-focused design, user-generated growth loops, and building embeddable UI components that feel native in diverse product environments.

• Strategic Influence: Contribute to Cello's product strategy and roadmap, influencing the direction of the company's core offering.

• Broader GTM Exposure: Gain deeper insights into marketing, brand, and launch strategies through direct collaboration on related design assets.

📝 Enhancement Note: The "bar for craft and attention to detail is exceptionally high" suggests that growth opportunities will be tied to demonstrated excellence in execution and a deep understanding of user experience principles within complex technical environments.

🌐 Work Environment

Office Type: Remote-first. Cello operates without a central physical office, allowing employees to work from anywhere within their specified remote regions.

Office Location(s): Germany-based, with a requirement for work schedules to overlap comfortably with a European work day (CET +/-3 hours). This is crucial for effective asynchronous collaboration and real-time communication when needed.

Workspace Context:

• Collaborative Environment: While remote, the culture emphasizes collaboration through async communication tools, regular virtual syncs, and in-person team off-sites. This fosters a sense of camaraderie and shared purpose.

• Operations Tools & Technology: Access to modern design tools like Figma, prototyping software, and project management platforms. The company likely utilizes a suite of collaboration tools to support its async-first, remote operations.

• Team Interaction: Opportunities for deep, focused work interspersed with structured collaboration sessions and team-building activities during off-sites.

Work Schedule: Flexible within the requirement to overlap with European working hours. This allows for deep work blocks and personal time management, balanced with team synchronization needs.

📝 Enhancement Note: The "async-first culture" combined with the "remote-first" nature of the company means that candidates must be proactive in their communication, documentation, and collaboration. Success will depend on their ability to be visible and impactful without constant in-person oversight.

📄 Application & Portfolio Review Process

Interview Process:

• Initial Screening: A review of your resume and portfolio to assess experience, skills, and alignment with the role's requirements. Be prepared to articulate your design philosophy and approach to problem-solving.

• Portfolio Presentation: A session where you present 2-3 key case studies from your portfolio. Focus on demonstrating your process, decision-making, impact, and how you approach systems thinking and detail-oriented design.

• Design Exercise/Challenge: Potentially a take-home assignment or a live design exercise focused on a specific problem relevant to Cello's product, testing your ability to think critically and design within constraints.

• Team Interviews: Discussions with the founding designer, product, and engineering leads to assess cultural fit, collaboration style, and strategic thinking.

• Final Interview: Likely with a founder or senior leader to discuss overall fit, vision, and long-term contributions.

Portfolio Review Tips:

• Showcase Systems Thinking: Clearly illustrate how your designs fit into a larger system, especially in the context of embedding UI.

• Highlight Impact: Quantify the success of your designs whenever possible, using metrics related to user engagement, conversion, or retention.

• Detail Your Process: Explain the "why" behind your design decisions, including user research, iteration, and collaboration.

• Emphasize Craft: Ensure your presented work reflects a high level of visual polish and attention to detail, aligning with Cello's standards.

• Tailor to Cello: Frame your case studies to highlight experiences and skills most relevant to Cello's mission and product, particularly concerning SaaS, embedded UI, and growth.

Challenge Preparation:

• Familiarize yourself with Cello's product and its target market (businesses looking to leverage user referrals for growth).

• Practice articulating design decisions and trade-offs clearly and concisely, as if presenting to product and engineering stakeholders.

• Be ready to discuss how you would approach designing for an "embedded UI" that needs to feel native in other products.

📝 Enhancement Note: The emphasis on "scrutinized by the world's best growth, design and engineering teams" suggests that candidates should anticipate rigorous questioning about their design rationale and the impact of their work. The portfolio review is a critical component, so ensure it's polished and tells a compelling story.

🛠 Tools & Technology Stack

Primary Tools:

• Figma: The core design tool for mockups, prototyping, and collaboration. Proficiency is essential.

• Prototyping Tools: Experience with other prototyping tools (e.g., ProtoPie, InVision, Adobe XD) is beneficial for exploring different interaction patterns.

• Design System Management: Familiarity with tools or methodologies for managing design systems (e.g., Storybook, Zeroheight, or Figma's component features).

Analytics & Reporting:

• While not a direct tool for the designer, understanding how to interpret user analytics (e.g., from tools like Amplitude, Mixpanel, Google Analytics) to inform design decisions is valuable. The designer will need to understand how their work impacts key growth metrics. CRM & Automation:

• Generally not a primary tool for product designers, but an understanding of how CRM and marketing automation tools function can provide context for B2B SaaS product design.

📝 Enhancement Note: The requirement for "experimenting regularly with new tooling" suggests that Cello values designers who are forward-thinking and open to adopting new technologies and methodologies to improve their craft and efficiency.

👥 Team Culture & Values

Operations Values:

• Craftsmanship & Detail: A deep commitment to high-quality design, paying meticulous attention to details that ensure user trust and a native feel within embedded UIs.

• Systems Thinking: Designing with a holistic view, understanding how individual elements contribute to the overall product architecture and user experience.

• Impact-Driven: Focusing on design solutions that directly contribute to business growth, user acquisition, and customer satisfaction.

• Collaboration & Communication: Valuing open, honest, and async-first communication, with a willingness to challenge ideas constructively.

• Ownership & Autonomy: Empowering individuals to take full responsibility for their work from conception to completion.

Collaboration Style:

• Async-First: Prioritizing written communication, clear documentation, and thoughtful asynchronous feedback to enable deep work and accommodate a remote, global team.

• Cross-Functional Integration: Working seamlessly with Product Management and Engineering to ensure design solutions are technically feasible, strategically aligned, and meet user needs.

• Feedback Culture: Encouraging a culture where constructive feedback is regularly exchanged to elevate the quality of work and foster continuous improvement.

📝 Enhancement Note: The company's "People Playbook" is highlighted as a resource for understanding their culture. Candidates are encouraged to review this resource to gain deeper insights into Cello's specific values and operational ethos.

⚡ Challenges & Growth Opportunities

Challenges:

• Designing for Embedded Experiences: Creating UI that feels native and trustworthy within diverse, third-party product environments presents a unique design challenge requiring adaptability and a deep understanding of context.

• Balancing Detail with Speed: Maintaining an exceptionally high bar for craft and attention to detail while working in a fast-paced startup environment where priorities can shift quickly.

• Evolving Design System: Contributing to and evolving a design system for a growing product requires foresight, scalability, and strong governance.

• Async Communication Mastery: Thriving in an async-first environment requires excellent self-management, proactive communication, and the ability to convey complex ideas effectively in writing.

Learning & Development Opportunities:

• Deep Dive into Growth Design: Gaining specialized knowledge in user-generated growth, referral programs, and product-led acquisition strategies.

• Systems Design Expertise: Further developing skills in designing and managing complex, scalable design systems.

• Startup Product Strategy: Contributing to the strategic direction of a rapidly growing SaaS company.

• Cross-Functional Skill Development: Enhancing collaboration and communication skills with product and engineering teams.

📝 Enhancement Note: The challenge of "designing infrastructure that lives in other people's products" implies a need for the designer to think about extensibility, configurability, and integration at a fundamental level, going beyond typical application design.

💡 Interview Preparation

Strategy Questions:

• "How would you approach designing an embedded UI component that needs to feel native within a client's existing product, considering varying design languages and user expectations?" (Focus on understanding context, constraints, and user perception.)

• "Describe a time you identified an opportunity to improve an existing product area beyond a specific feature request. What was your process and the outcome?" (Demonstrate proactivity, problem-solving, and iterative design.)

• "How do you approach designing for scalability within a design system, and what are the key considerations for ensuring consistency across multiple product lines or user segments?" (Highlight systems thinking and long-term vision.) Company & Culture Questions:

• "What interests you most about Cello's mission to turn users into acquisition channels, and how do you see design playing a role in that?" (Show genuine interest and strategic alignment.)

• "How do you thrive in an async-first, remote work environment, and what strategies do you employ to ensure effective collaboration and communication?" (Address remote work experience and communication skills.)

• "Describe a situation where you had to push back on a design direction or challenge an idea from a stakeholder. How did you approach it?" (Assess communication, influence, and courage.) Portfolio Presentation Strategy:

• Narrative Structure: For each case study, clearly define the problem, your role, the constraints, your process, the solution, and the measurable impact.

• Visual Storytelling: Use mockups, prototypes, and diagrams effectively to illustrate your thinking and design decisions.

• Focus on Rationale: Be prepared to explain why you made specific design choices, linking them back to user needs, business goals, and design principles.

• Highlight Details: Point out specific design details that demonstrate your high bar for craft and attention to detail, especially those related to trust and native feel.

📝 Enhancement Note: Given Cello's focus on serving other businesses and the "scrutinized by the world's best growth, design and engineering teams" aspect, expect interviewers to probe deeply into the strategic underpinnings of your design decisions and your ability to contribute to a high-performance, quality-driven culture.

📌 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 2-3 of your strongest case studies that best demonstrate your experience with SaaS products, systems thinking, end-to-end product design, and attention to detail in UI.

• Resume Optimization: Ensure your resume clearly articulates your years of experience, specific skills (Figma, prototyping, visual design, interaction design), and achievements in SaaS product design. Use keywords from the job description.

• Cover Letter Focus: If a cover letter is requested, clearly express your understanding of Cello's mission and how your design philosophy aligns with their emphasis on growth, embedded UI, and high craft standards.

• Company Research: Review Cello's website, any available case studies, and their "People Playbook" to understand their product, market, and culture. Prepare to discuss your insights.

⚠️ 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.