I am a digital product designer with over 20 years of experience, transitioning from graphic design to specialization in Product Design, UX/UI consulting, and Behavioral Design. I excel in interactive prototyping, design systems, and usability testing to deliver business-aligned solutions. I have led cross-functional teams (PMs, developers, and stakeholders) to create intuitive, accessible, and user-centered products. I leverage data-driven insights and strategic thinking to resolve ambiguity and drive continuous improvement.

Santiago Muñoz Sebastián

I am a digital product designer with over 20 years of experience, transitioning from graphic design to specialization in Product Design, UX/UI consulting, and Behavioral Design. I excel in interactive prototyping, design systems, and usability testing to deliver business-aligned solutions. I have led cross-functional teams (PMs, developers, and stakeholders) to create intuitive, accessible, and user-centered products. I leverage data-driven insights and strategic thinking to resolve ambiguity and drive continuous improvement.

Available to hire

I am a digital product designer with over 20 years of experience, transitioning from graphic design to specialization in Product Design, UX/UI consulting, and Behavioral Design. I excel in interactive prototyping, design systems, and usability testing to deliver business-aligned solutions.

I have led cross-functional teams (PMs, developers, and stakeholders) to create intuitive, accessible, and user-centered products. I leverage data-driven insights and strategic thinking to resolve ambiguity and drive continuous improvement.

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Language

Spanish; Castilian
Fluent
English
Advanced

Work Experience

CX Lead at Hewlett Packard / Nacar Design Studio
January 1, 2025 - Present
Project requirements research and definition. User field exploration, contextual analysis, and competitive benchmarking. Behavioral data collection and qualitative analysis. Design and execution of research methods: user interviews, usability testing, shadowing, five-second tests, card sorting, concept validation, and surveys. Synthesis and interpretation of research insights. Preparation and delivery of final findings and strategic presentations to stakeholders.
Senior Product Designer at Flat 101 UX
January 1, 2022 - December 31, 2023
UX research and user behavior analysis. Data analysis, ideation, and decision-making based on key findings. Design of user flows, wireframes, and prototypes. Leadership and mentoring of UX teams in digital projects. Task prioritization and on-time delivery; quality assessment of deliverables. Cross-functional coordination with product managers, developers, and stakeholders.
Senior Product Designer at Minsa IT
January 1, 2021 - December 31, 2022
UX research and user behavior analysis. Data analysis, ideation, and decision-making based on key findings. Design of user flows, wireframes, and prototypes. UX design team management and mentoring. Task prioritization, quality assurance, and collaboration with product managers, clients, and engineers.
Product Designer at Clickars
January 1, 2021 - December 31, 2021
Conducted user research through usability testing, interviews, and behavioral analysis. Designed user flows, wireframes, and prototypes. Collaborated and communicated directly with stakeholders to optimize workflows and align strategic objectives.
Senior UX/UI Design Lead at TUI Spa
January 1, 2023 - December 31, 2024
UX research and user behavior analysis. Data analysis, ideation, and decision-making based on insights. Design of user flows, wireframes, prototypes, and app gamification. Design leadership through collaboration with PMs, development, AI, and customer service teams.
Senior UX/UI Consultant at El País (Grupo Prisa)
January 1, 2024 - December 31, 2024
Oversaw the design of new features for the EL PAÍS app through benchmarking of global and local news platforms to identify UX/UI trends. Created interaction flows, wireframes, and prototypes. Ensured alignment with product managers and visual teams for cohesive execution.
Senior Product Designer at Minsait
January 1, 2021 - December 31, 2022
UX research and user behavior analysis. Data analysis, ideation, and decision-making based on key findings. Design of user flows, wireframes, and prototypes. UX design team management and mentoring. Task prioritization, quality assurance, and collaboration with product managers, clients, and engineers. Delivered solutions for clients such as Agencia Tributaria Catalana, Telefónica, Xunta de Galicia, Correos, and Asisa.
Product Designer at Clicars
January 1, 2021 - December 31, 2021
Conducted user research through usability testing, interviews, and behavioral analysis. Designed user flows, wireframes, and prototypes. Collaborated and communicated directly with stakeholders to optimize workflows and align strategic objectives.
Senior UX/UI Design Lead at TUI Spain
January 1, 2023 - December 31, 2024
UX research and user behavior analysis. Data analysis, ideation, and decision-making based on insights. Design of user flows, wireframes, prototypes, and app gamification. Design leadership through collaboration with PMs, development, AI, and customer service teams.
Senior UX/UI Consultant at El País (Grupo Prisa)
January 1, 2020 - Present
Oversaw the design of new features for the EL PAÍS app through benchmarking of global and local news platforms to identify UX / UI trends. Created interaction flows, wireframes, and prototypes. Ensured alignment with product managers and visual teams for cohesive execution.

Education

Design System Bootcamp at Figma Camp
May 1, 2025 - July 24, 2026
Behavioral Economics & Psychology in Marketing at Mindworx Behavioral Design
January 1, 2024 - January 7, 2026
Behavioral Design at Irrational Labs
January 1, 2023 - January 7, 2026
Product Psychology Masterclass at Growth.design
October 3, 2022 - December 23, 2022
Behavioral Design at Marcel
January 1, 2021 - January 7, 2026
Service Design at UXer School
January 1, 2020 - January 7, 2026
UX Research at La Nave No Driza
January 1, 2019 - January 7, 2026
UX Design at UXer School
January 1, 2018 - January 7, 2026

Qualifications

Design System Bootcamp
January 11, 2030 - January 7, 2026
Mindworx
January 11, 2030 - January 7, 2026
Behavioral Economics & Psychology in Marketing
January 11, 2030 - January 7, 2026
Behavioral Design
January 11, 2030 - January 7, 2026
Product Psychology Masterclass
January 11, 2030 - January 7, 2026
Service Design UX School
January 11, 2030 - January 7, 2026
UX Research Lab
January 11, 2030 - January 7, 2026

Industry Experience

Software & Internet, Professional Services, Media & Entertainment, Education, Retail, Financial Services
    paper Landing page for a new Online Digital Account

    The Challenge
    Increase conversions on the new Digital Account landing page by applying behavioral design principles, with a focus on:

    • Making the core economic benefit visible from the very first moment.
    • Reducing the frictions that caused hesitation and decision paralysis.
    • Simplifying the interpretation of secondary benefits without overwhelming the user.

    Actions Taken

    1. Reframing the main benefit (Hero)
      We redesigned the Hero to highlight the monthly financial gain directly and concretely.
      → “Earn X€ every month from day one.”

    2. Benefit calculator (reducing uncertainty)
      We added a small module where users can enter their balance and immediately see their real benefit.
      → Less uncertainty, more clarity.

    3. Simplifying benefits (lower cognitive load)
      We grouped real advantages into simple bullet points:

    • No fees
    • 100% digital
    • Immediate transfers
    1. Social proof + authority
      We showed real satisfaction data and recognitions from the bank.
      → Increased trust and credibility.

    2. Clear step-by-step flow (reduced effort)
      We explicitly clarified the process:
      → Less perceived effort → more action.

    Behavioral Design Principles Applied

    • Framing
      Economic benefit visible from the first glance.

    • Reducing cognitive friction
      Calculator + simplified benefits.

    • Social proof / Authority
      Satisfaction data + recognitions.

    • Guided action
      Clear steps → reduced perceived effort.

    Conclusion
    The collaboration with Bankinter demonstrated how a behavior-driven, clarity-focused approach can transform a critical acquisition journey. By simplifying the flow and improving the way information was framed, we helped users move through the process with greater confidence, reducing friction in key decision points and increasing their understanding of the product without adding complexity.
    Beyond improving the user experience, the project strengthened alignment across business, design, and engineering. It enabled more informed decision-making and a shared, unified view of the customer journey. The result was a clearer, more efficient, and scalable process—one that supports future iterations and provides a stronger foundation for both users and the organization.

    paper Hotel Management Platform

    The Challenge
    TUI wanted to improve how hotel managers operate and make decisions in hotels of up to 200 rooms. They needed a fast, intuitive platform that would bring together:

    • Real-time hotel performance data
    • Competitor insights
    • Simplified daily operations
    • Clearer decision-making
    • Motivational mechanisms

    All within a context where no prior documentation existed, processes varied across hotels, and a new multi-disciplinary team had just been formed.
    To achieve this, TUI launched a new internal Tribe (The Longing Place – TLP), combining product managers, designers, developers, and stakeholders working together on a unified product vision.

    Actions Taken

    1. Research with hotel managers (real behavioral insights)
      Because this project was built from scratch, our first priority was understanding hotel managers’ needs, workflows, and motivations.

    a. Stakeholder & user interviews
    b. Co-creation sessions
    c. Documentation & synthesis
    d. User flows & behavioral maps

    1. Product design
      The design team worked with an Agile methodology, with daily ceremonies and continuous alignment across squads.

    · Prototyping
    · Design System
    · Usability testing

    My role focused on aligning Design, Business, and Development, ensuring smooth communication across teams and a shared vision of the product.

    1. Gamification strategy
      To increase motivation and daily engagement, we introduced gamification elements grounded in behavioral design principles:
      · Behavioral insights
      · New interaction flows
      · Rewards & reinforcement

    A more engaging platform with a sense of progress, achievement, and belonging — significantly increasing frequency of use.

    Behavioral Design Principles Applied:

    • Framing
      Clear dashboards, simplified metrics, actionable insights.

    • Gamification / Motivation
      Rewards, recognitions, and daily tasks.

    • Guided action
      Step-by-step flows for complex decisions.

    • User-aligned mental models
      Interface aligned to the real behavior of hotel managers.

    • Signals & immediate feedback
      Visible signs of progress and motivational cues.

    Conclusion
    The TUI Spain project demonstrated how behavior-centered design, combined with agile methodologies, can transform the way hotel managers work across the hospitality sector.
    We built a platform that significantly improved:

    · Decision-making,
    · Operational efficiency,
    · Motivation and daily engagement,
    · Collaboration between business, design, and engineering.

    This became a key internal tool within TUI, showing how thoughtful design, behavioral insight, and technology can work together to create measurable impact on both user experience and business results.

    paper POS Contracting for Small Businesses

    The Challenge
    The POS contracting process for small businesses was perceived as complex and slow. Santander needed to understand the real user journey, identify frictions and risks, simplify key decisions, highlight the POS value from the beginning, detect abandonment points, and generate behavioral recommendations to improve conversion.

    Actions Taken

    1. UX hygiene analysis
      We conducted a full UX audit of the contracting funnel, identifying navigation inconsistencies, visual overload, ambiguous microcopy, unnecessary friction, and critical pain points during review and confirmation stages.

    2. Context analysis
      To understand how business owners evaluate and choose a POS, we analyzed the decision context across four dimensions:
      – Economic (fees, financial impact, price sensitivity)
      – Temporal (time constraints and availability)
      – Structural (device requirements, operational constraints)
      – Emotional (trust, uncertainty, risk avoidance)

    3. Decision architecture
      Using behavioral design principles, we restructured the flow so each step reinforced clarity and momentum. We assessed user goals, information needs, cognitive effort, motivation drivers, and barriers preventing progress.

    4. Funnel analysis
      We mapped the full POS contracting funnel:
      Awareness (need identification), Consideration (process evaluation), Decision (execution), and Retention (post-purchase perception).
      This allowed us to identify friction points, behavioral blockers, and missed opportunities at each stage.

    5. Behavioral framework — Fogg Model
      We applied the Fogg Behavior Model to understand when and why users progressed or dropped off. We evaluated motivation, ability (ease, effort, comprehension), and prompts needed to trigger action.

    6. Behavioral mapping
      We identified key motivations, emotional states, decision bottlenecks, perceived risks, trust-building moments, and points where value needed reinforcement, translating insights into behavior-based recommendations.

    Behavioral Design Principles Applied
    – Reframing the main message to “earn more by accepting card payments”
    – Reducing cognitive friction through clearer value explanation and decision structure
    – Streamlining flows to reduce effort
    – Guiding action with clear prompts and progressive disclosure
    – Aligning recommendations with real business-owner mental models

    Conclusion
    This project reimagined the POS contracting process from a behavioral and business perspective. Through a comprehensive audit of motivations, frictions, anxieties, and real-world decision patterns, we identified critical conversion blockers, structural and psychological friction, opportunities to strengthen value perception, and key moments where trust must be reinforced.