Senior Product Designer

📍 Job Overview

Job Title: Senior Product Designer

Company: Tendios

Location: Spain (Remote)

Job Type: FULL_TIME

Category: Product Design / UX/UI

Date Posted: 2026-09-08

Experience Level: 5-10 Years

Remote Status: Fully Remote (within Spain)

🚀 Role Summary

• Lead the end-to-end product design lifecycle for innovative AI-first SaaS solutions, encompassing user research, wireframing, high-fidelity UI, and post-launch analysis.

• Specialize in designing complex interaction patterns for AI-driven features, focusing on conversational interfaces, AI-assisted content generation, and user control over AI outputs.

• Drive the evolution and maintenance of a robust design system to ensure consistency and accelerate delivery across multiple product lines.

• Collaborate intimately with Product Management and Engineering teams in a fast-paced startup environment, translating business needs and user insights into actionable design solutions.

📝 Enhancement Note: This role is positioned as a Senior Product Designer, implying significant autonomy and a need for strategic input into product direction. The emphasis on "AI-First" and "SaaS" within a startup context suggests a dynamic environment requiring adaptability and a strong understanding of emerging technologies. The "remote from the rest of the country" detail indicates a flexible approach to remote work, but the "real hybrid" context and Barcelona base suggest potential for in-person collaboration.

📈 Primary Responsibilities

• Own the complete user experience journey for Tendios Bid and Tendios Create, from initial problem discovery and user interviews to the final polished interface and production monitoring.

• Design sophisticated interaction patterns specifically for AI-First functionalities, including conversational UIs, AI-assisted content creation and editing, management of AI output confidence levels, and mechanisms for human oversight.

• Translate complex business objectives and intricate user needs into clear, intuitive, and actionable design solutions that drive product adoption and user satisfaction.

• Actively participate in product discovery activities, including conducting user interviews, performing usability tests, analyzing product data, and collaborating on prioritization with Product Managers.

• Maintain, evolve, and champion the company's design system, ensuring its adoption and adherence across all product interfaces to guarantee visual and interactive consistency and enhance development velocity.

• Foster a strong, collaborative relationship with the Engineering team, ensuring seamless handoffs and high-quality implementation of designed features, and actively participate in problem-solving during the development phase.

• Integrate AI tools into your personal design workflow to enhance efficiency in exploration, prototyping, and the creation of production-ready assets, pushing the boundaries of AI-assisted design.

📝 Enhancement Note: The responsibilities clearly indicate a hands-on design role with significant strategic input. The emphasis on "AI-First" design patterns and working within a "Product team" alongside Engineering and Product Managers points to a highly collaborative and integrated role within the product development lifecycle, common in modern tech startups.

🎓 Skills & Qualifications

Education: While no specific degree is mandated, a strong portfolio demonstrating relevant experience is paramount. Candidates with degrees in Design, Human-Computer Interaction, Computer Science, or related fields may possess a strong foundational understanding.

Experience: A minimum of 5-10 years of progressive experience in product design, with a proven track record in designing modern SaaS applications.

Required Skills:

• Demonstrable experience designing modern SaaS products: A robust portfolio showcasing real-world case studies that highlight your design process, strategic decision-making, and measurable impact, not just aesthetic outcomes.

• Expertise in AI-First product design: Proven experience designing products with a significant AI component, or a deep understanding of the unique design challenges introduced by AI (e.g., probabilistic outcomes, latency, error handling, trust, user control).

• Proficiency with AI design tools: Demonstrated fluency in utilizing AI assistants for design, code generation, prototyping, and production, coupled with a proactive approach to exploring and implementing AI in the design workflow for AI-First applications.

• Mastery of modern design tools: Advanced proficiency in Figma and its associated ecosystem for wireframing, prototyping, UI design, and collaboration.

• Strong design fundamentals: Solid command of interaction design principles, visual hierarchy, accessibility standards (WCAG), and the ability to build and maintain comprehensive design systems.

• Professional English proficiency: Essential for engaging with documentation, tools, and cross-functional communication within an international team.

• Autonomy and strong communication: Ability to work independently, articulate design decisions with data-backed arguments, and effectively present rationale to stakeholders.

• Collaborative mindset: Experience thriving within integrated Product teams, working closely with Product Managers and Engineers to achieve shared goals.

Preferred Skills:

• Product analytics tools: Familiarity with platforms such as Amplitude, Mixpanel, or similar for data-driven design insights.

• B2B/Vertical product experience: Previous design experience in complex B2B or vertical markets like legaltech, govtech, fintech, or other professional tools.

• Code familiarity: Comfort with reading or understanding front-end code (e.g., Vue/React, Tailwind CSS) or experience with code-based prototyping.

• Generative AI in production: Hands-on experience designing and validating generative AI patterns deployed in live production environments.

• Startup/Fast-paced environment: Prior experience in a startup or a rapid product development setting.

📝 Enhancement Note: The "imprescindible" (essential) and "suma puntos" (adds points) sections clearly delineate required versus preferred qualifications. The emphasis on AI and SaaS is a recurring theme, underscoring its centrality to the role and the company's product strategy. The request for a portfolio with "impacto conseguido" (impact achieved) is a critical requirement for senior design roles.

📊 Process & Systems Portfolio Requirements

Portfolio Essentials:

• Demonstrate end-to-end product ownership: Showcase 2-3 detailed case studies that illustrate your complete design journey, from initial problem definition and user research through to final UI implementation and post-launch analysis.

• Highlight AI design challenges and solutions: Feature projects where you specifically addressed the complexities of AI-driven features, such as designing for uncertainty, managing user trust, or creating effective conversational interfaces.

• Showcase strategic decision-making and impact: Clearly articulate the rationale behind your design choices, supported by data, user feedback, or business objectives, and quantify the impact of your solutions on key metrics (e.g., user engagement, conversion rates, efficiency gains).

• Illustrate design system contributions: If applicable, include examples of how you have contributed to or leveraged a design system, demonstrating your commitment to consistency and scalability.

Process Documentation:

• Workflow design and optimization: Provide examples of how you have mapped out user flows, identified pain points, and designed streamlined workflows for complex processes, particularly within SaaS or AI-driven applications.

• Methodology for discovery and validation: Detail your approach to user research, usability testing, and data analysis, emphasizing how you gather insights to inform design decisions and validate solutions.

• Implementation and collaboration: Describe your methods for collaborating with engineering teams to ensure accurate implementation and your process for working with product managers on feature definition and prioritization.

📝 Enhancement Note: The explicit request for a portfolio with "casos reales, decisiones, impacto" and the focus on AI-first applications mean that candidates must prepare a portfolio that goes beyond just showcasing screens. It needs to tell a story about their problem-solving process and the tangible results of their design work, especially concerning AI features.

💵 Compensation & Benefits

Salary Range: Based on industry standards for a Senior Product Designer role with 5-10 years of experience in Spain, particularly in a fully remote, tech-focused startup environment, the estimated salary range is €45,000 - €65,000 annually. This range considers the competitive landscape for specialized design talent and the company's focus on performance-based bonuses.

Benefits:

• Indefinite contract: Provides job security and long-term commitment.

• Competitive salary with performance-based bonuses: Offers financial rewards tied to individual and company performance, aligning incentives.

• Accelerated startup environment with growth opportunities: Presents a dynamic career path with potential for rapid professional development and increased responsibility.

• Team events and collaborative culture: Fosters a strong sense of community and team cohesion, crucial for remote teams.

• Professional development and training opportunities: Supports continuous learning and skill enhancement through dedicated resources and programs.

Working Hours: The standard full-time working hours are estimated at 40 hours per week. Given the remote and hybrid nature, there is likely flexibility in daily scheduling, though core collaboration hours will be expected.

📝 Enhancement Note: The salary range is an estimation based on typical compensation for Senior Product Designers in Spain, considering the remote aspect and the startup environment. Actual compensation may vary based on the candidate's specific experience, skills, and negotiation. The benefits package emphasizes both financial incentives and professional growth, common in competitive tech roles.

🎯 Team & Company Context

🏢 Company Culture

Industry: The company operates within the GovTech and SaaS sectors, specifically focusing on revolutionizing public procurement processes through AI. This niche positions Tendios at the intersection of technology innovation and public administration efficiency.

Company Size: Tendios is a young, rapidly growing startup (founded in 2023), suggesting a lean, agile, and potentially dynamic organizational structure. This implies that roles have significant scope and impact, with less bureaucracy than larger, established companies.

Founded: Founded in 2023, Tendios is a relatively new entrant, likely driven by a modern approach to technology and business strategy, with AI at its core.

Team Structure:

• Product Team Integration: The Senior Product Designer will be a core member of the Product team, working daily alongside Product Managers and Engineers. This indicates a flat, collaborative structure focused on cross-functional synergy.

• Reporting: While not explicitly stated, the Senior Product Designer likely reports to a Head of Product, VP of Product, or a similar leadership role within the product function.

• Cross-functional Collaboration: Emphasis is placed on close, daily collaboration with Engineering and Product Management, suggesting a highly integrated workflow where design, product strategy, and technical implementation are closely aligned.

Methodology:

• AI-First Approach: The company's core methodology revolves around leveraging AI extensively across its products (Tendios Bid and Tendios Create) for features like assisted writing, opportunity pipelines, and document analysis. This AI-centric approach is fundamental to their value proposition.

• Agile Development: As a startup, Tendios likely employs agile methodologies, emphasizing iterative development, rapid feedback loops, and continuous improvement based on user data and market needs.

• Data-Driven Design: The role involves participating in product discovery through data review, suggesting a commitment to using analytics to inform design decisions and measure impact.

Company Website: https://tendios.com/ (Note: The provided URL was tendios.teamtailor.com, which is their applicant tracking system. The primary company website is tendios.com)

📝 Enhancement Note: The company's focus on AI in public procurement is a unique selling proposition. Understanding this niche will be crucial for candidates. The startup environment implies a fast-paced, hands-on culture where individual contributions are highly visible and impactful.

📈 Career & Growth Analysis

Operations Career Level: This Senior Product Designer role is positioned at an experienced individual contributor level. It requires a high degree of autonomy, strategic thinking, and the ability to lead design initiatives for complex, AI-driven products. The role is ideal for designers who can operate independently, influence product direction, and mentor junior team members implicitly through their work and collaboration.

Reporting Structure: The designer will be embedded within the Product team, working closely with Product Managers and Engineering leads. Direct reporting is likely to a Head of Product or equivalent, with significant interaction across development and product strategy functions.

Operations Impact: The Senior Product Designer will have a direct and visible impact on the core functionality and user experience of Tendios' SaaS products. By designing intuitive interfaces for AI-first features, they will directly influence user adoption, efficiency gains for clients (businesses and public entities), and the company's ability to win and retain contracts. Their work will be instrumental in shaping how public procurement is managed in the future.

Growth Opportunities:

• Leadership in Design: Potential to grow into a Design Lead or Head of Design role as the company scales, taking on more strategic responsibilities and managing a growing design team.

• Specialization in AI Design: Deepen expertise in the rapidly evolving field of AI-Human Interaction design, becoming a subject matter expert in this critical and future-oriented domain.

• Product Strategy Influence: Contribute significantly to product strategy through design-led discovery and innovation, potentially moving into Product Management or a hybrid Product Design/Strategy role.

• Cross-functional Skill Development: Gain extensive experience working within a fast-paced tech startup, developing skills in agile methodologies, data analysis, and business acumen.

📝 Enhancement Note: The "Senior" title and emphasis on autonomy suggest a role with significant scope for individual contribution and influence. Growth opportunities are tied to the company's scaling trajectory, offering paths into leadership or specialized expertise within AI design.

🌐 Work Environment

Office Type: The company operates a "real hybrid" model, with a base in Barcelona. While the role is fully remote within Spain, the "real hybrid" aspect suggests that occasional in-person collaboration, team events, or strategic offsites in Barcelona are likely part of the culture. This offers a blend of remote flexibility with opportunities for in-person connection.

Office Location(s): The primary operational hub and likely location for any in-person gatherings is Barcelona, Spain. The remote nature of the role means candidates can be based anywhere within Spain.

Workspace Context:

• Collaborative Digital Space: Expect a highly digital and collaborative work environment, leveraging tools like Figma, Slack, and video conferencing for daily interactions.

• AI-Powered Tools: The workspace will be equipped with AI tools integrated into the design and development workflow, encouraging experimentation and efficiency.

• Cross-functional Interaction: Opportunities for frequent interaction with Product Managers and Engineers through daily stand-ups, design reviews, and joint problem-solving sessions.

Work Schedule: The role is full-time, with an estimated 40 hours per week. While core working hours will be established for team collaboration, the remote flexibility allows for some autonomy in structuring the workday, provided deliverables are met and availability for key meetings is maintained.

📝 Enhancement Note: The "real hybrid" model is a key differentiator. While remote-friendly, candidates should be prepared for occasional travel or in-person requirements, particularly for team events or critical strategic sessions. This model aims to balance flexibility with the benefits of in-person collaboration.

📄 Application & Portfolio Review Process

Interview Process:

• Portfolio & CV Review: Initial screening focusing on your design experience, particularly with SaaS and AI-first products, and the clarity/impact demonstrated in your portfolio.

• Initial Interview (Fit & Motivation): A conversation to assess your cultural fit with the startup environment, your motivation for joining Tendios, and your understanding of their mission.

• Product & Engineering Team Interview: A deeper dive into your design process, problem-solving skills, and technical collaboration capabilities. This may involve discussing specific case studies from your portfolio and potentially a design challenge.

• Offer: If successful through all stages, a formal job offer will be extended.

Portfolio Review Tips:

• Curate for Impact: Select 2-3 of your strongest case studies that best represent your experience with SaaS products and, crucially, any AI-related design challenges you've tackled.

• Showcase Your Process: Clearly articulate the problem statement, your research methods, the design iterations, your rationale for key decisions, and how you collaborated with stakeholders.

• Quantify Results: Whenever possible, include metrics that demonstrate the impact of your designs. This could be user engagement increases, conversion rate improvements, efficiency gains for users, or positive feedback from usability tests.

• Highlight AI Expertise: Explicitly detail your approach to designing for AI-first applications. Discuss challenges related to user trust, data privacy, conversational interfaces, and how you ensured user control and understanding.

• Prepare for Discussion: Be ready to walk through your portfolio projects in detail, answer questions about your decision-making process, and discuss how your skills align with Tendios' AI-first mission.

Challenge Preparation:

• Anticipate Design Challenges: Prepare for potential design exercises that might involve problem-solving for AI-driven features, improving existing SaaS workflows, or designing a new feature within the public procurement domain.

• Focus on Process and Rationale: Even if a full design is not required, be prepared to outline your thought process, potential research steps, and initial design directions. Emphasize your ability to articulate your approach.

• AI-Specific Considerations: Think about how you would approach designing for ambiguity, user education around AI capabilities, and ensuring ethical AI use within a product context.

📝 Enhancement Note: The application process emphasizes the portfolio heavily, particularly for demonstrating experience with AI and SaaS. Candidates should prepare to discuss their design decisions and the impact of their work in detail.

🛠 Tools & Technology Stack

Primary Tools:

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

• AI Design Assistants: Candidates are expected to be fluent in using AI tools to accelerate their workflow, including AI assistants for design, code generation, and prototyping. Examples might include tools integrated into Figma or standalone AI platforms.

Analytics & Reporting:

• Product Analytics Tools (Preferred): Familiarity with Amplitude, Mixpanel, or similar platforms is desirable for understanding user behavior and informing design decisions.

CRM & Automation:

• While not directly a design tool, understanding the principles of SaaS product development and how design integrates with user management and workflow automation is beneficial.

📝 Enhancement Note: Figma is explicitly mentioned as a requirement. The emphasis on AI tools for design workflow suggests that candidates should be comfortable experimenting with and adopting new AI-powered design technologies as they emerge.

👥 Team Culture & Values

Operations Values:

• AI-First Mindset: A deep-seated belief in leveraging AI as the core of product development and user experience. This value drives innovation and efficiency.

• Collaboration and Integration: A commitment to working closely and seamlessly with Product Management and Engineering, breaking down traditional silos.

• Impact and Ownership: A drive to create products that have a tangible, positive impact on users and the public sector, with individuals taking ownership of their contributions.

• Agility and Adaptability: Embracing the fast-paced nature of a startup, being adaptable to change, and iterating quickly based on feedback and market dynamics.

• Innovation and Experimentation: A culture that encourages exploring new ideas, pushing technological boundaries, and experimenting with novel design and AI solutions.

Collaboration Style:

• Cross-functional Synergy: Expect a highly collaborative environment where designers, product managers, and engineers work hand-in-hand, sharing knowledge and co-creating solutions.

• Open Feedback Culture: A willingness to give and receive constructive feedback openly and regularly, fostering continuous improvement in both product and team dynamics.

• Knowledge Sharing: Encouragement of sharing learnings, best practices, and insights, particularly around AI design and new technologies, to elevate the entire team's capabilities.

📝 Enhancement Note: The "AI-First" value is central to Tendios' identity and will permeate all aspects of their operations and product development. Candidates should be prepared to demonstrate how they align with and contribute to this core ethos.

⚡ Challenges & Growth Opportunities

Challenges:

• Designing for AI Ambiguity: Navigating the inherent uncertainties of AI outputs, such as probabilistic results, potential errors, and varying levels of confidence, and translating these into user-friendly interfaces that build trust.

• Balancing Innovation with Usability: Ensuring that cutting-edge AI features are not only innovative but also intuitive, accessible, and easy for users (including those less tech-savvy in public administration) to adopt and benefit from.

• Rapid Iteration in a Startup: Adapting quickly to shifting priorities, evolving product roadmaps, and the need for rapid design-to-development cycles in a fast-paced startup environment.

• Maintaining Design System Scalability: Ensuring the design system can effectively support new, AI-driven features and evolving product lines while maintaining consistency and development efficiency.

Learning & Development Opportunities:

• Deep Dive into AI UX: Become a specialist in the rapidly evolving field of AI-Human Interaction (AIHI) and generative AI design patterns.

• Influence Product Strategy: Contribute significantly to the strategic direction of innovative GovTech and AI products.

• Startup Growth Trajectory: Experience the accelerated career growth and broad exposure typical of a scaling tech startup, potentially leading to leadership roles.

• Industry Exposure: Gain insights into the complexities of public procurement and the transformative potential of AI in this sector.

📝 Enhancement Note: The challenges are directly linked to the company's core offering and environment. Candidates who can demonstrate problem-solving skills in these areas will be highly valued. The growth opportunities highlight the potential for significant career advancement and specialization.

💡 Interview Preparation

Strategy Questions:

• "Describe a complex SaaS product you designed from concept to launch. What were the biggest challenges, and how did you overcome them?" (Focus on your process, decision-making, and impact.)

• "How would you approach designing a conversational interface for a public procurement platform? What are the key considerations for user trust and AI reliability in this context?" (Demonstrate your understanding of AI-first design principles and your ability to apply them to a specific domain.)

• "Imagine a scenario where our AI tool generates an inaccurate proposal. How would you design an interface that allows users to identify, correct, and learn from such errors?" (Showcase your problem-solving skills and user-centric approach to AI design.) Company & Culture Questions:

• "What interests you most about Tendios' mission to revolutionize public procurement with AI?" (Research the company's mission and values thoroughly.)

• "How do you see your role as a Senior Product Designer contributing to an AI-First culture?" (Articulate your understanding of AI's role in design and your proactive approach to using AI tools.)

• "Describe your experience working in a fast-paced startup environment. How do you handle ambiguity and rapid changes?" (Highlight your adaptability and resilience.) Portfolio Presentation Strategy:

• Tell a Story: For each case study, narrate the problem, your journey, your specific contributions, the decisions you made and why, and the measurable outcomes.

• Focus on AI-Specifics: If a project involved AI, dedicate specific slides or sections to explaining your approach to AI design challenges, user interaction with AI, and how you ensured user control and trust.

• Quantify Impact: Use data, metrics, and user feedback to support the success of your designs. This is critical for demonstrating value.

• Be Ready for Deep Dives: Anticipate detailed questions about your design choices, your collaboration process with engineers and PMs, and your thought process for handling trade-offs.

📝 Enhancement Note: Interview preparation should heavily emphasize the AI-first aspect of the role and the company's specific industry. Candidates should be prepared to discuss their portfolio with a focus on problem-solving, strategic decision-making, and quantifiable impact, particularly concerning AI features.

📌 Application Steps

To apply for this Senior Product Designer position:

• Submit your application through the Tendios Teamtailor portal.

• Curate your portfolio: Select 2-3 of your most impactful case studies, focusing on modern SaaS products and any experience with AI-driven features. Ensure each case study clearly outlines the problem, your process, your decisions, and the resulting impact.

• Tailor your CV: Highlight keywords such as "Product Design," "SaaS," "AI-First Design," "Figma," "User Experience," "Interaction Design," and any relevant B2B or GovTech experience. Quantify achievements where possible.

• Prepare for the interview: Research Tendios' mission, products, and AI-first approach. Practice articulating your design process, decision-making rationale, and how you would tackle AI-specific design challenges. Be ready to present your portfolio confidently.

• Demonstrate cultural fit: Show enthusiasm for working in a fast-paced startup environment and a genuine interest in revolutionizing public procurement through technology.

⚠️ 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.