Senior Product Designer B2B SaaS

📍 Job Overview

Job Title: Senior Product Designer B2B SaaS

Company: haddock

Location: Barcelona, Catalonia, Spain

Job Type: FULL_TIME

Category: Product Design / UX/UI Design

Date Posted: 2026-07-22T15:35:39

Experience Level: Senior

Remote Status: Hybrid (2 days in office)

🚀 Role Summary

• Lead the end-to-end product design process, encompassing discovery, research, interaction design, prototyping, and validation for a B2B SaaS platform.

• Drive the creation and scaling of a comprehensive design system from its inception, ensuring brand consistency and efficient design implementation.

• Integrate AI capabilities into the design process and product experience, focusing on AI Agents and conversational workflows for a non-technical user base.

• Collaborate closely with engineering teams to ensure the fidelity and quality of shipped features, translating design concepts into robust, user-friendly solutions.

• Conduct customer research, usability testing, and data analysis to inform iterative design improvements and measure product impact.

📝 Enhancement Note: This role is positioned as a foundational, leadership-oriented design position within a startup environment. The emphasis on "rebuilding the design function," "shaping how design works," and "building haddock's design system from scratch" indicates significant autonomy and strategic influence for the chosen candidate. The "Senior" title, coupled with the responsibility for end-to-end ownership and design system creation, suggests a need for a candidate who can not only execute but also strategize and establish design best practices.

📈 Primary Responsibilities

• Own the entire product design lifecycle, from initial problem definition and user discovery through to the successful implementation and post-launch iteration of features.

• Design intuitive and elegant user interfaces and interaction flows for both the core B2B SaaS system (e.g., financial metrics, inventories) and specialized AI Agents like 'Fina'.

• Proactively engage with customers through interviews and usability testing to deeply understand their needs, validate design hypotheses, and gather actionable feedback.

• Translate complex, ambiguous business problems into clear, user-centered solutions that are both functional and aesthetically pleasing.

• Partner effectively with software engineers during the development phase, providing clear specifications, design assets, and constructive feedback to maintain design integrity.

• Monitor user interaction data and key performance indicators (KPIs) to extract insights that inform future design iterations and product enhancements.

• Establish and meticulously build haddock's design system, defining standards for UI components, brand guidelines, and overall visual consistency across the product.

📝 Enhancement Note: The responsibilities clearly delineate a hands-on, strategic role. The emphasis on "owning the end-to-end design process" and "building haddock's design system from scratch" signifies a pivotal opportunity for an experienced designer to establish foundational design infrastructure. The inclusion of specific product areas like "AI Agents, like Fina" and "surfacing financial metrics and insights" provides concrete examples of the design challenges.

🎓 Skills & Qualifications

Education: While no specific degree is mandated, a strong portfolio demonstrating equivalent practical experience in product design is expected.

Experience: 5+ years of product design experience, specifically within scaling B2B SaaS companies, is a core requirement. This experience should encompass end-to-end product ownership, not just visual design execution.

Required Skills:

• Proven end-to-end product design expertise, covering discovery, research, interaction design, prototyping, and validation within a product development context.

• Strong command of design systems, with demonstrable experience in building, scaling, or significantly contributing to one.

• Active, hands-on experience leveraging Artificial Intelligence (AI) tools and methodologies within the design process, showcasing developed judgment and productivity gains.

• Fluency in Spanish, enabling effective communication within the local team and with Barcelona-based customers.

• Professional proficiency in English for documentation, project management, and broader team collaboration.

• Demonstrated ability to turn ambiguous problems into clear, usable, and elegant solutions.

• Experience in tracking usage, measuring interactions, and extracting actionable conclusions from data to inform design iterations. Preferred Skills:

• Experience growing or leading a design function within an early-stage startup environment.

• Familiarity with front-end development concepts (e.g., components, states) to facilitate constructive dialogue with engineers regarding technical feasibility.

• Experience independently conducting customer interviews and usability tests from initiation to analysis.

📝 Enhancement Note: The requirement for "active, hands-on use of AI in your design process" with "developed judgment (criterio)" is a critical differentiator, suggesting the company is deeply invested in AI-driven product development and seeks a designer who can lead in this emerging area. The distinction between a "screen decorator" and someone "responsible for outcomes" highlights the desired strategic and impact-oriented mindset.

📊 Process & Systems Portfolio Requirements

Portfolio Essentials:

• Showcase end-to-end product design case studies that clearly demonstrate your involvement from problem discovery through to shipped solutions and measured impact.

• Include examples of design system development or significant contributions, highlighting your approach to component creation, documentation, and scalability.

• Present projects where AI was actively integrated into the design process or the final product, detailing your rationale, methodology, and the outcomes achieved.

• Demonstrate your ability to translate ambiguous problems into well-defined, user-centered design solutions, with clear problem statements and solution rationales.

• Provide evidence of user research, usability testing, and data analysis informing your design decisions and leading to measurable improvements. Process Documentation:

• Detail your approach to user research and discovery, including methods for identifying user needs and validating product hypotheses.

• Illustrate your process for designing user flows and interfaces, emphasizing clarity, usability, and aesthetic appeal.

• Explain your methodology for collaborating with engineering teams during implementation to ensure design fidelity and quality.

• Describe how you track product usage, analyze interaction data, and use these insights for iterative design improvements.

📝 Enhancement Note: The emphasis on "responsible for outcomes, not just for delivering mockups" strongly suggests that portfolio case studies should quantify impact and demonstrate a connection between design decisions and business results. The expectation to "build haddock's design system from scratch" means candidates should be prepared to discuss their philosophy and practical approach to design system architecture and implementation.

💵 Compensation & Benefits

Salary Range: €40,000 - €60,000 gross per year. This range is expected to grow alongside the company and the individual's contributions.

Benefits:

• Competitive salary with potential for growth.

• Hybrid work environment with 2 dedicated office days per week for collaboration and team building.

• Access to all desired AI tooling for experimentation and productivity enhancement.

• Subsidized Urban Sports Club membership, offering a variety of fitness and wellness activities.

• Salary flexibility benefits through Playflow, allowing for customized compensation packages.

• A high-quality office space in Poblenou, Barcelona, featuring a rooftop area.

Working Hours: Full-time, with a standard expectation of approximately 40 hours per week, balanced by a hybrid work arrangement that offers flexibility.

📝 Enhancement Note: The salary range provided (€40k-€60k gross/year) is competitive for a Senior Product Designer role in Barcelona, particularly within a startup environment that offers significant growth potential. The note that the salary "will grow as haddock — and you — grow" is a key incentive for ambitious candidates. The inclusion of specific benefits like Urban Sports Club and Playflow indicates a focus on employee well-being and flexible compensation.

🎯 Team & Company Context

🏢 Company Culture

Industry: Technology / Software (B2B SaaS), specifically focused on the restaurant industry.

Company Size: Startup, indicated by the "rebuilding the design function," "early-stage startup" preference, and backing by Y Combinator. This implies a dynamic, agile, and potentially resource-constrained but high-impact environment.

Founded: The company is backed by Y Combinator, suggesting it's a relatively young but established startup with significant growth potential and a validated product-market fit.

Team Structure:

• Operates in small, mission-oriented squads of 1 to 3 people, fostering close collaboration and rapid iteration.

• The design function is being rebuilt, implying an opportunity to shape its structure and processes.

• Cross-functional collaboration is central, with designers working closely with engineers and product teams. Methodology:

• Strong adherence to Lean Startup and Agile principles, prioritizing action, iteration, and face-to-face communication.

• Emphasis on continuous improvement of processes and tools, with all team members contributing.

• Data-driven decision-making, using usage tracking and interaction metrics to inform design.

Company Website: https://www.haddock.app/

📝 Enhancement Note: The company's focus on "empowering millions of restaurateurs to level up their business" through AI-powered back-office solutions provides a clear mission. The mention of "rebuilding the design function" suggests that culture will be heavily influenced by the new Senior Product Designer's leadership and philosophy. The Lean Startup and Agile adherence indicates a fast-paced, iterative, and adaptable work environment.

📈 Career & Growth Analysis

Operations Career Level: This role represents a Senior Product Designer position with significant leadership potential, particularly in establishing and scaling the design function. It's a critical, foundational role within the product team.

Reporting Structure: While not explicitly stated, the role likely reports to the Head of Product (Ingrid) and collaborates closely with co-founders (Pol). As the design function grows, this role could evolve into a Design Lead or Manager position.

Operations Impact: The Senior Product Designer will have a direct and substantial impact on the product's usability, user adoption, and ultimately, the success of restaurant businesses using haddock. Their work on core flows, AI agents, and the design system will shape the user experience and drive business value.

Growth Opportunities:

• Opportunity to build and lead the design function at an early-stage startup, defining its culture, processes, and standards.

• Potential for advancement into a Design Lead or Manager role as the company scales and the design team expands.

• Deepen expertise in AI-driven product design and its application in the B2B SaaS space.

• Contribute to a product with significant market potential and direct impact on customer businesses.

• Develop skills in establishing design systems from scratch and driving product-market fit through design.

📝 Enhancement Note: The role is explicitly framed as an opportunity to "shape what design becomes at haddock." This implies significant growth potential beyond individual contribution, with the possibility of building and leading a design team. The emphasis on "ownership" and "autonomy" suggests a fast track for high performers.

🌐 Work Environment

Office Type: Modern office space located in Poblenou, Barcelona, described as potentially "the best office you've ever worked at," featuring a rooftop area.

Office Location(s): Avinguda Diagonal, 123, Barcelona, 08005, Spain. The location is noted as being "a step away from the people using what we build," with many restaurants customers based nearby.

Workspace Context:

• Hybrid work model, requiring 2 days per week in the office to foster trust, collaboration, alignment, and creative synergy.

• Access to a modern, well-equipped office environment that supports creative work and team interaction.

• Opportunities for collaboration within small, mission-oriented squads.

• A culture that values experimentation, particularly with AI tooling.

Work Schedule: Full-time, with a hybrid arrangement offering flexibility between office and remote work. The emphasis on Agile and Lean Startup suggests a dynamic schedule that prioritizes productivity and iterative development.

📝 Enhancement Note: The description of the office ("rooftop during a product retro breakfast") paints a picture of a vibrant, collaborative, and engaging work environment. The hybrid model aims to balance focused individual work with essential team collaboration, a common and effective setup for modern design teams.

📄 Application & Portfolio Review Process

Interview Process:

• Intro Call (25 mins): Initial screening with Ingrid (Head of Product) to assess basic fit and interest.

• Portfolio Review & Design Deep-Dive (45-60 mins): In-depth discussion with the Product team to evaluate design skills, experience, and approach through portfolio review.

• Design Challenge/Take-Home Exercise: A practical assessment of design skills, problem-solving abilities, and process. This will be followed by a walkthrough session to discuss the approach and rationale.

• Final Call (25 mins): Concluding conversation with Pol (Co-founder) to discuss company vision, cultural fit, and final alignment.

Portfolio Review Tips:

• Showcase End-to-End Ownership: Highlight case studies where you managed the entire design process from discovery to launch and iteration, emphasizing your role in driving outcomes.

• Demonstrate Design System Expertise: Clearly articulate your experience in building or scaling design systems, including your methodology, challenges faced, and the impact of your work.

• Highlight AI Integration: Be prepared to discuss specific instances where you've used AI in your design workflow or product design, detailing your thought process and the benefits realized.

• Quantify Impact: Wherever possible, use metrics and data to demonstrate the success of your design solutions, such as improvements in user engagement, conversion rates, or task completion times.

• Tailor to haddock: Reference haddock's mission, product, and target users (restaurants) in your case studies or cover letter to show genuine interest and understanding.

Challenge Preparation:

• Understand the Product: Familiarize yourself with haddock's current product offerings, target audience (restaurants), and its AI-driven approach.

• Focus on Process: Be ready to articulate your design process clearly and justify your decisions, especially regarding problem-solving and iterative design.

• Prepare for AI Scenarios: Anticipate design challenges that involve integrating AI, such as designing conversational interfaces or automating workflows.

• Practice Presenting Your Work: Rehearse presenting your portfolio and design challenge solutions concisely and effectively, focusing on storytelling and impact.

📝 Enhancement Note: The swift hiring process (aiming for completion within a week) indicates a highly motivated and efficient team. The emphasis on a "personalized message or cover letter" suggests that candidates should go beyond a generic application and demonstrate genuine interest in haddock and the specific role.

🛠 Tools & Technology Stack

Primary Tools:

• Design & Prototyping: Candidates are expected to be proficient in industry-standard tools. While not explicitly named, common tools include Figma, Sketch, Adobe XD, InVision, or similar. Given the emphasis on AI, tools that integrate with AI for design assistance or generation might be relevant.

• Design Systems: Experience with tools and methodologies for creating, managing, and scaling design systems.

• User Research & Testing Platforms: Tools for conducting user interviews, surveys, and usability testing (e.g., UserTesting.com, Maze, Lookback).

Analytics & Reporting:

• Product Analytics: Proficiency in analyzing user behavior data to inform design decisions. Tools like Mixpanel, Amplitude, Google Analytics, or similar are likely utilized.

• Data Visualization: Ability to interpret and present data effectively, potentially using dashboarding tools.

CRM & Automation:

• While not directly a design tool, understanding how design integrates with CRM and automation workflows can be beneficial.

📝 Enhancement Note: The explicit mention of "All the AI tooling you want to experiment with" suggests that haddock is open to adopting new AI-powered design tools and encourages experimentation. Candidates should be prepared to discuss their experience with and interest in AI design tools.

👥 Team Culture & Values

Operations Values:

• Ownership & Autonomy: Taking full responsibility for work and driving initiatives independently.

• Iteration & Excellence: Embracing iterative development while striving for high-quality solutions.

• AI Integration: Actively exploring and utilizing AI in design processes and product features.

• Customer Centricity: Deeply understanding and serving the needs of restaurateurs.

• Collaboration & Communication: Working effectively within small teams and across functions.

Collaboration Style:

• Works in small, mission-oriented squads, fostering close-knit collaboration.

• Favors face-to-face communication and a fast-paced environment.

• Encourages contribution to improving processes and tools.

• Close collaboration with engineers during implementation is crucial.

📝 Enhancement Note: The company's values are deeply embedded in its Lean Startup and Agile methodology. The emphasis on "ownership," "iteration," and "embracing AI" suggests a forward-thinking, proactive, and results-oriented team culture.

⚡ Challenges & Growth Opportunities

Challenges:

• Establishing a Design System from Scratch: This involves defining standards, creating components, and ensuring adoption across the product and team.

• Integrating AI Seamlessly: Designing AI-driven features that are intuitive, trustworthy, and genuinely valuable to non-technical users.

• Balancing Startup Pace with Design Quality: Maintaining high design standards in a fast-paced, iterative startup environment.

• Driving Design Impact in a Growing Startup: Demonstrating the value of design and influencing product strategy as the company scales.

Learning & Development Opportunities:

• Leadership in Design: Opportunity to build and shape a design function from the ground up.

• AI Design Specialization: Becoming an expert in applying AI to product design challenges within the B2B SaaS context.

• Product Strategy Influence: Contributing significantly to product direction and roadmap through design leadership.

• Startup Growth Experience: Gaining invaluable experience in a high-growth startup environment with significant product-market fit.

📝 Enhancement Note: The primary challenge and growth opportunity lie in the foundational nature of the role. The successful candidate will not just be a designer but a builder, establishing the design discipline at haddock and influencing its future trajectory.

💡 Interview Preparation

Strategy Questions:

• "Describe a time you had to establish a design system from scratch. What were your key considerations, and what was the outcome?" (Focus on process, challenges, and impact)

• "How do you approach designing for AI-powered features, particularly conversational agents like Fina? What are the unique challenges and opportunities?" (Emphasize AI judgment and user trust)

• "Walk us through a complex B2B SaaS problem you solved through design. What was your process, and how did you measure success?" (Highlight end-to-end ownership and data-driven iteration) Company & Culture Questions:

• "What interests you most about haddock's mission to empower restaurateurs with AI?" (Demonstrate understanding of the business and passion for the problem space)

• "How do you see yourself contributing to and shaping the design culture at an early-stage startup like haddock?" (Showcase leadership potential and cultural fit)

• "How do you balance the need for design excellence with the fast-paced iteration cycles typical of a startup?" (Address adaptability and pragmatic design) Portfolio Presentation Strategy:

• Structure Your Case Studies: For each case study, clearly articulate the problem, your role and process, the solutions, and the measurable impact. Use visuals effectively.

• Emphasize AI and Design Systems: Dedicate specific sections or clear call-outs to projects involving AI integration and design system work, as these are key requirements.

• Quantify Outcomes: Wherever possible, present data and metrics that demonstrate the success of your designs and your contribution to business goals.

• Tell a Story: Frame your work as a narrative, highlighting the challenges, your problem-solving approach, and the lessons learned.

• Be Prepared for Deep Dives: Anticipate detailed questions about your design decisions, technical considerations, and collaboration methods.

📝 Enhancement Note: The interview process is designed to assess not only design skills but also strategic thinking, problem-solving abilities, and cultural alignment with a fast-paced startup environment. Candidates should prepare to articulate their "criterio" for AI integration and their vision for building a design function.

📌 Application Steps

To apply for this Senior Product Designer position:

• Submit your application through the provided link on jobs.haddock.app.

• Craft a Personalized Cover Letter: Address your cover letter to Ingrid or the hiring team, specifically mentioning why you are excited about haddock's mission, the opportunity to build the design function, and your experience with AI in design.

• Curate Your Portfolio: Ensure your portfolio prominently features 2-3 end-to-end case studies that highlight your B2B SaaS experience, design system work, and, crucially, your hands-on use of AI in design. Quantify the impact of your work whenever possible.

• Optimize Your Resume: Tailor your resume to emphasize your 5+ years of product design experience in scaling B2B SaaS, your expertise in design systems, and your practical AI application skills. Use keywords from the job description.

• Prepare for the Interview Process: Familiarize yourself with haddock's product and mission. Practice articulating your design process, your approach to AI integration, and your vision for design leadership. Be ready to discuss your portfolio in detail.

⚠️ 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.