Senior Product Experience Engineer (UX + Frontend, LeSS)

📍 Job Overview

Job Title: Senior Product Experience Engineer (UX + Frontend, LeSS)

Company: knowmad mood

Location: Madrid, Community of Madrid, Spain

Job Type: Full-Time

Category: Product Experience & Engineering Operations

Date Posted: April 29, 2026

Experience Level: Senior (5-10 years)

Remote Status: 100% Remote

🚀 Role Summary

• This role is a hybrid Product Experience Engineer position, blending User Experience (UX) design principles with Frontend Development expertise to shape and deliver exceptional digital products.

• It requires a strong understanding of scaled agile frameworks, specifically LeSS (Large-Scale Scrum), to ensure cohesive product development across multiple teams.

• The position involves acting as a primary UX lead in organizations with developing UX maturity, focusing on building and scaling UX capabilities.

• Key responsibilities include collaborating closely with Product Owners, engineering teams, and stakeholders to define and execute product vision, while also contributing to and evolving shared design systems and UI patterns.

📝 Enhancement Note: Given the "Senior Product Experience Engineer" title and the explicit mention of "UX + Frontend" and "LeSS," this role is positioned at a senior individual contributor level. The emphasis on acting as a "referente principal de UX" in "baja madurez" environments and "habilitando y elevando la capacidad de UX de la organización" suggests a leadership and mentorship component, bridging the gap between strategic UX vision and practical frontend implementation within a complex agile structure. The "LeSS" framework implies a need for strong cross-team coordination and communication skills.

📈 Primary Responsibilities

• End-to-End Product Experience Definition: Define, design, and continuously evolve the holistic user experience of digital products, ensuring a seamless and intuitive journey from initial user interaction to final outcome.

• Frontend Solution Implementation: Design and implement robust, scalable, and performant frontend solutions that are technically sound, align with UX best practices, and meet business objectives.

• UX Capability Building & Scaling: Serve as the initial UX expertise, actively working to build, mentor, and scale UX competencies and best practices across various product teams within the organization.

• Design System & Pattern Stewardship: Define, maintain, and evolve core UX principles, design patterns, and best practices to ensure consistency, coherence, and efficiency across all product interfaces and development teams.

• Cross-Functional Product Collaboration: Collaborate intimately with Product Owners, engineering leads, and other key stakeholders to co-create product roadmaps, define feature requirements, and ensure alignment between user needs, business goals, and technical feasibility.

• Team Enablement through Coaching & Pairing: Actively support and guide development teams through hands-on coaching, pair programming, and knowledge sharing sessions to elevate their UX understanding and frontend implementation skills.

• LeSS Environment Coherence: Ensure consistency and coherence of the product experience across multiple, inter-dependent teams operating within the LeSS framework, facilitating communication and shared understanding.

📝 Enhancement Note: The responsibilities are structured to reflect the dual nature of the role (UX and Frontend) and the specific context of a "low maturity" UX environment within a scaled agile setup (LeSS). The emphasis on "building and scaling UX capabilities," "defining principles and patterns," and "coaching and pairing" highlights the proactive and influential nature of this senior position, going beyond individual contribution to team and organizational uplift.

🎓 Skills & Qualifications

Education: While no specific degree is mandated, a Bachelor's or Master's degree in Computer Science, Human-Computer Interaction, Design, or a related field is often preferred for senior roles in this domain. Equivalent practical experience will also be considered.

Experience: A minimum of 5 years of progressive experience in digital product development, with a significant focus on both User Experience (UX) design and professional Frontend Development.

Required Skills:

• UX Design & Product Experience: Over 5 years of hands-on experience in UX design, user research, information architecture, wireframing, prototyping, and user testing within digital product environments.

• Frontend Development Expertise: Proven experience delivering complex, production-ready user interfaces using modern frontend technologies (e.g., HTML5, CSS3, JavaScript, and relevant frameworks like React, Vue, or Angular).

• Scaled Agile Frameworks (LeSS): Demonstrated experience working effectively within scaled agile environments, with a strong preference for experience in LeSS or similar frameworks (SAFe, Nexus).

• Design Systems & UI Patterns: Solid understanding and practical experience in creating, contributing to, or evolving design systems, style guides, and reusable UI component libraries.

• Cross-Functional Collaboration & Stakeholder Management: Proven ability to collaborate effectively with Product Owners, engineering teams, designers, QA, and business stakeholders, translating needs into actionable technical and design requirements.

• Mentorship & Coaching: Experience in guiding, mentoring, and enabling team members without direct formal authority, fostering a culture of continuous learning and improvement.

• Systemic Thinking & UX Acumen: Strong analytical skills with a systemic approach to problem-solving and a deep understanding of UX principles and best practices.

• High-Level English Proficiency: Fluent in spoken and written English, essential for effective communication in international and remote team settings.

Preferred Skills:

• Hybrid UX + Frontend Roles: Previous experience in roles that explicitly combined both UX design and frontend development responsibilities.

• Product Management Fundamentals: Understanding of product management principles, roadmapping, and prioritization within agile development cycles.

• Organizational UX Enablement: Direct experience in initiatives aimed at enhancing an organization's overall UX maturity and capabilities.

• Advanced Digital Transformation: Familiarity with broader digital transformation strategies and how UX and frontend excellence contribute to business success.

📝 Enhancement Note: The required skills are directly drawn from the "valoramos" and "valoraremos muy positivamente" sections of the job description. The "Hybrid UX + Frontend Roles" and "Organizational UX Enablement" are specifically listed as strong positives, indicating they are highly desired. The mention of "LeSS" is crucial and implies a need for understanding complex organizational structures and inter-team dependencies.

📊 Process & Systems Portfolio Requirements

Portfolio Essentials:

• UX Case Studies: A curated selection of detailed UX case studies showcasing your end-to-end product experience design process, from problem definition and user research to wireframing, prototyping, user testing, and final design solutions.

• Frontend Implementation Examples: Demonstrations of complex frontend features or applications you have developed, highlighting code quality, responsiveness, performance optimization, and adherence to design specifications.

• Design System Contributions: Evidence of your involvement in creating, maintaining, or contributing to design systems, style guides, or component libraries, illustrating your understanding of consistency and reusability.

• Cross-Team Collaboration Showcase: Examples of how you have collaborated with diverse teams (Product, Engineering, QA) and stakeholders to drive product initiatives, potentially including artifacts like user journey maps, process flows, or project retrospectives.

Process Documentation:

• User-Centered Design Workflows: Documentation of your established user-centered design processes, including methodologies for user research, ideation, validation, and iterative design.

• Frontend Development Best Practices: Examples of documented frontend development workflows, including code review processes, testing strategies (unit, integration, E2E), and deployment pipelines.

• Design System Governance: Processes for managing design system evolution, including contribution guidelines, version control, and communication strategies for updates across teams.

• Agile Process Integration: How your UX and frontend work integrates seamlessly into scaled agile ceremonies and workflows, particularly within a LeSS context, demonstrating adaptability and efficiency.

📝 Enhancement Note: For a hybrid UX/Frontend role at a senior level, especially one focused on building UX capabilities and working with LeSS, a strong portfolio is critical. This section infers that candidates need to demonstrate not just the output but also the process behind their work, emphasizing how they drive consistency, efficiency, and collaboration in a complex environment.

💵 Compensation & Benefits

Salary Range: For a Senior Product Experience Engineer with 5-10 years of experience, working remotely in Spain, the estimated salary range is typically between €50,000 and €70,000 per year. This range can vary based on specific experience, the depth of frontend and UX skills, and the exact responsibilities within the LeSS framework.

Benefits:

• Indefinite Contract: Permanent employment with job security.

• 100% Remote: Full remote work flexibility, allowing for work from anywhere within Spain.

• Internal Training & Certification Access: Opportunities for professional development through internal training programs and access to industry certifications.

• Flexible Compensation Plan: A comprehensive package including:

  • Health Insurance
  • Transportation Allowance (if applicable, though less relevant for 100% remote)
  • Childcare Vouchers
  • Restaurant Vouchers

• Referral Bonus: Incentives for recommending qualified candidates through the "plan amigo" program.

• Company Events & Meetups: Participation in internal events, tech meetups, and knowledge-sharing sessions.

Working Hours: The role is full-time, typically around 40 hours per week. While remote, adherence to standard working hours and availability during core business hours for team collaboration and meetings is expected. Flexibility may be offered, aligning with agile team needs and project demands.

📝 Enhancement Note: The salary range is estimated based on industry benchmarks for senior-level hybrid UX/Frontend roles in Spain, considering the remote nature and the company's focus on digital transformation. The benefits are directly listed from the job description, highlighting attractive aspects for potential candidates.

🎯 Team & Company Context

🏢 Company Culture

Industry: Digital Transformation & Technology Consulting. knowmad mood operates at the intersection of technology, innovation, and sustainable development, helping clients navigate their digital journeys.

Company Size: Over 3,000 employees. This indicates a large, established organization with diverse opportunities and a structured environment, yet potentially with pockets of agility and innovation.

Founded: Not explicitly stated, but the company's growth to over 3,000 employees suggests a significant history and a proven track record in the digital transformation space.

Team Structure:

• Operations Team: While this is a Product Experience Engineer role, it operates within a broader organizational structure focused on delivering digital solutions. The role likely sits within a product engineering or digital product development team.

• Reporting Structure: The role reports likely to a Product Lead, Engineering Manager, or Head of Product/UX, with a dotted line to Product Owners within specific agile teams.

• Cross-Functional Collaboration: High emphasis on collaboration with Product Owners, other engineers (backend, QA), UX designers (if separate), product managers, and business stakeholders across various product lines and initiatives.

Methodology:

• Agile & LeSS: The primary methodology is Agile, with a specific focus on LeSS for scaling. This implies a commitment to iterative development, continuous feedback, continuous integration, and cross-team synchronization.

• User-Centricity: A strong focus on user needs and delivering value through well-designed and well-engineered products.

• Innovation & Digital Transformation: The company's core business drives a culture of innovation, embracing new technologies and approaches to solve client challenges.

Company Website: https://www.knowmadmood.com/

📝 Enhancement Note: The company description highlights "digital transformation," "innovation," and "sustainable development," suggesting a forward-thinking and purpose-driven culture. The "3,000+ people" size implies a robust organizational framework, while the "LeSS" mention points to a specific, often complex, agile scaling approach that requires significant coordination and communication.

📈 Career & Growth Analysis

Operations Career Level: This is a Senior Individual Contributor role. It's positioned for experienced professionals who can not only execute complex tasks but also influence processes, mentor others, and contribute to the strategic direction of product experience and frontend development within their domain. The role is ideal for someone looking to deepen their expertise in a hybrid capacity and drive UX maturity.

Reporting Structure: You will likely report to a manager responsible for product development or engineering. Within the LeSS framework, you'll work closely with multiple Product Owners and Scrum Masters, forming part of several "feature teams" or dedicated "component teams."

Operations Impact: As a Senior Product Experience Engineer, your impact will be multifaceted:

• Product Quality: Directly influence the usability, desirability, and technical quality of digital products.

• User Satisfaction: Drive higher user engagement, retention, and overall satisfaction through superior product experiences.

• Development Efficiency: Improve development velocity and reduce rework by establishing strong design systems, clear patterns, and effective frontend practices.

• Organizational UX Maturity: Play a pivotal role in elevating the company's overall UX capabilities, making it a more user-centric organization.

• Team Enablement: Empower other engineers and product professionals with enhanced UX and frontend skills, fostering a culture of shared responsibility.

Growth Opportunities:

• Specialization Deepening: Further hone expertise in advanced UX techniques, specific frontend frameworks, or complex design system architecture.

• Leadership in UX/Frontend: Transition into roles with greater strategic influence, such as Lead UX Designer, Lead Frontend Engineer, or even Product Management.

• Mentorship & Coaching Leadership: Develop into a formal mentor or coach, leading initiatives to upskill entire teams or departments in UX and frontend best practices.

• Cross-Domain Expertise: Expand knowledge into related areas like product strategy, accessibility, performance engineering, or even backend integration.

• Contribution to LeSS Framework: Gain deeper experience in optimizing agile processes at scale, potentially leading initiatives to refine LeSS implementation within the organization.

📝 Enhancement Note: The "Senior" title and the emphasis on "building and scaling UX capabilities" clearly position this role for significant growth and influence. The hybrid nature offers a unique path to become a versatile leader in product development.

🌐 Work Environment

Office Type: 100% Remote. This role offers complete freedom from a physical office, allowing you to work from any location within Spain.

Office Location(s): While the job is remote and based in Madrid (Plaza de la Independencia, 28001), the remote nature means you are not tied to this specific physical location. The company has a presence in Madrid, but the role is fully distributed.

Workspace Context:

• Collaborative Digital Space: Expect to work within a highly collaborative digital environment using tools for communication (e.g., Slack, Teams), project management (e.g., Jira, Trello), and design collaboration (e.g., Figma, Sketch).

• Technology & Tools: Access to modern development tools, design software, and cloud-based platforms necessary for remote work and efficient product development.

• Team Interaction: Regular virtual meetings, stand-ups, retrospectives, and pair programming sessions will be integral to daily work, fostering strong connections despite physical distance.

Work Schedule: Full-time, approximately 40 hours per week. While remote, availability during core Spanish business hours (e.g., 9 AM - 6 PM CET) is generally expected to facilitate synchronous collaboration with colleagues and stakeholders. Some flexibility may be possible, depending on team needs and project deadlines.

📝 Enhancement Note: The "100% REMOTE" and "TELECOMMUTE" classification are key. While the listed address is Madrid, the role is explicitly stated as remote within Spain. This implies a need for strong self-discipline, excellent communication skills, and proficiency with remote collaboration tools.

📄 Application & Portfolio Review Process

Interview Process:

1. Initial Screening: A recruiter or HR representative will review your application, focusing on your experience in UX, Frontend, and Agile methodologies.

2. Hiring Manager/Team Lead Interview: A discussion with a hiring manager or team lead to assess your overall fit, experience level, understanding of UX/Frontend principles, and experience with scaled agile environments like LeSS.

3. Technical/Portfolio Review: This is a crucial stage where you will present your portfolio. Expect to walk through 1-2 key case studies, detailing your design process, problem-solving approach, technical implementation, and impact. This may involve live coding or code review for frontend aspects.

4. Team Collaboration/LeSS Scenario Interview: You might engage with potential teammates or Product Owners to discuss how you'd approach collaboration, mentorship, and problem-solving within a LeSS context, potentially involving a hypothetical scenario.

5. Final Interview: A concluding conversation, potentially with a senior leader, to finalize the offer and discuss company culture, long-term vision, and your role within it.

Portfolio Review Tips:

• Curate Strategically: Select 2-3 projects that best showcase your hybrid UX + Frontend skills, your ability to work in complex/scaled agile environments, and your impact.

Prioritize projects where you can demonstrate end-to-end ownership.

• Structure for Impact: For each case study, clearly articulate:

  • The Problem/Challenge: What was the user or business problem you were trying to solve?
  • Your Role & Responsibilities: Specifically what did you do?
  • Your Process: Detail the UX research, design thinking, and frontend development steps.
  • Key Decisions & Rationale: Explain why you made certain design or technical choices.
  • The Solution: Show the final design and/or implemented features.
  • The Impact & Results: Quantify outcomes with metrics (e.g., conversion rates, user satisfaction scores, performance improvements, adoption rates).

• Highlight LeSS Context: If possible, discuss how your work integrated with or influenced multiple teams in a scaled agile setting.

• Showcase Frontend Code: Be prepared to discuss your frontend code, architectural decisions, and best practices. If possible, provide links to live demos or a GitHub repository (ensure it's clean and well-documented).

• Focus on Influence: For this role, emphasize how you enabled others, built UX capabilities, and influenced teams without direct authority.

Challenge Preparation:

• UX Design Challenge: Be ready for a take-home or live design exercise focusing on a specific user problem. Practice defining scope, user flows, wireframes, and mockups, and articulating your reasoning.

• Frontend Coding Challenge: Prepare for a coding assessment that tests your proficiency in modern JavaScript frameworks, HTML, CSS, and potentially data handling or API integration relevant to product development.

• LeSS/Agile Scenario: Think about how you would handle common challenges in scaled agile environments, such as conflicting priorities across teams, ensuring consistency, or facilitating communication between Product Owners and development teams.

📝 Enhancement Note: The interview process is inferred to be thorough, given the senior and hybrid nature of the role. The emphasis on portfolio presentation and specific challenges is tailored to assess both UX design and frontend development skills, as well as the ability to operate effectively within a LeSS framework and contribute to UX maturity.

🛠 Tools & Technology Stack

Primary Tools:

• Design & Prototyping: Figma, Sketch, Adobe XD (Proficiency in at least one is expected for UX, Figma is increasingly standard for collaboration).

• Frontend Development:

  • Languages: HTML5, CSS3, JavaScript (ES6+).
  • Frameworks/Libraries: React, Vue.js, or Angular (Experience with at least one is highly likely).
  • Build Tools: Webpack, Vite, Parcel.
  • State Management: Redux, Vuex, Context API.
  • Styling: Sass/SCSS, Styled Components, Tailwind CSS.

• Version Control: Git (GitHub, GitLab, Bitbucket).

Analytics & Reporting:

• Product Analytics: Google Analytics, Amplitude, Mixpanel, Heap (Understanding how to instrument and analyze user behavior).

• Performance Monitoring: Lighthouse, WebPageTest, browser developer tools for performance profiling.

• A/B Testing Tools: Optimizely, VWO, or custom implementations.

CRM & Automation:

• While not a direct CRM role, understanding how product features integrate with CRM systems (e.g., Salesforce, HubSpot) or marketing automation platforms might be beneficial for context.

• Project Management/Agile Tools: Jira, Confluence, Trello (Essential for working within Agile/LeSS environments).

📝 Enhancement Note: This section extrapolates common tools used in modern UX and Frontend development roles, especially within agencies or companies focused on digital transformation. Proficiency in Figma and a major JavaScript framework (React, Vue, Angular) are almost certainly expected. The inclusion of agile tools is critical given the LeSS requirement.

👥 Team Culture & Values

Operations Values:

• Collaboration: A strong emphasis on teamwork, open communication, and shared ownership across diverse teams (UX, Frontend, Product, Backend). Expect a culture that values collective problem-solving.

• Innovation: A drive to explore new technologies, design approaches, and solutions that push the boundaries of digital experiences and contribute to client success.

• Commitment: Dedication to delivering high-quality work, meeting project goals, and fostering long-term client relationships through reliable performance.

• Fun: A belief that an enjoyable work environment fosters creativity and productivity. This may manifest in team-building activities, supportive communication, and a positive atmosphere.

• Trust: A foundation of mutual respect and confidence among team members, enabling autonomy, transparency, and accountability.

Collaboration Style:

• Cross-Functional Integration: Expect a highly integrated workflow where UX designers, frontend engineers, backend engineers, and Product Owners work in tight loops, sharing knowledge and decision-making.

• Process Improvement Focus: An open attitude towards feedback and continuous improvement of workflows, methodologies, and tools to enhance efficiency and product quality.

• Knowledge Sharing: Encouragement of sharing best practices, learnings, and expertise through internal meetups, tech talks, documentation, and pair programming.

📝 Enhancement Note: The company values (collaboration, innovation, commitment, fun, trust) are directly from the "description_html." These will heavily influence how individuals are expected to interact and contribute within teams. The "LeSS" framework itself necessitates a specific collaborative style focused on transparency and coordination.

⚡ Challenges & Growth Opportunities

Challenges:

• Building UX Maturity: In an organization with "low UX maturity," a primary challenge will be establishing foundational UX processes, advocating for user-centered design, and educating stakeholders and teams on its importance and impact.

• Balancing UX & Frontend Demands: Effectively managing the dual responsibilities of deep UX thinking and hands-on frontend development, ensuring neither is compromised.

• Coordinating Across LeSS: Navigating the complexities of a scaled agile framework like LeSS, ensuring alignment, managing dependencies, and maintaining coherence across multiple feature teams.

• Influencing Without Authority: Guiding and uplifting teams and individuals in UX and frontend best practices without direct managerial oversight requires strong communication, persuasion, and relationship-building skills.

• Remote Collaboration: Maintaining strong team cohesion, effective communication, and high productivity in a fully remote, globally distributed, or multi-team environment.

Learning & Development Opportunities:

• Advanced UX Specialization: Opportunities to delve deeper into areas like user research methodologies, interaction design, accessibility standards, or UX strategy.

• Frontend Framework Mastery: Becoming a subject matter expert in specific frontend frameworks, performance optimization, or modern web architecture.

• Scaled Agile Expertise: Gaining in-depth knowledge and practical experience in implementing and optimizing LeSS or other scaled agile frameworks.

• Leadership & Mentorship: Developing skills in leading teams, mentoring junior colleagues, and driving organizational change initiatives.

• Industry Conferences & Certifications: Access to funding and time for attending relevant conferences and pursuing professional certifications in UX, frontend, or agile methodologies.

📝 Enhancement Note: Challenges are inferred from the role's description, particularly the "low maturity UX" context and the "LeSS" framework. Growth opportunities are framed around advancing the core skills of the role and moving into leadership or specialized expert positions.

💡 Interview Preparation

Strategy Questions:

• "Describe your approach to defining and evolving the end-to-end user experience for a complex digital product, especially in an environment with developing UX maturity." (Focus on your process, user research, and iterative design.)

• "How would you ensure consistency in UX and frontend implementation across multiple teams working within a LeSS framework? What strategies would you employ to influence these teams without direct authority?" (Highlight your understanding of LeSS coordination, communication, and enablement techniques.)

• "Walk us through a challenging frontend project you delivered. What were the technical hurdles, how did you overcome them, and what was the impact on the product or user experience?" (Be ready to discuss code quality, performance, and architectural decisions.)

Company & Culture Questions:

• "Based on what you know about knowmad mood and our focus on digital transformation, how do you see your hybrid UX/Frontend skills contributing to our mission?" (Research the company's recent projects, values, and market position.)

• "Our values include Collaboration, Innovation, Commitment, Fun, and Trust. Can you provide an example of how you've embodied one of these values in a previous role?" (Prepare specific anecdotes.)

Portfolio Presentation Strategy:

• Start with the 'Why': Clearly articulate the problem statement and business/user goals for each project.

• Show, Don't Just Tell: Use visuals (wireframes, mockups, prototypes, screenshots of live features) extensively. For frontend, consider a live demo or a well-structured GitHub repository.

• Emphasize Your Role & Process: Be specific about your contributions as a hybrid UX/Frontend engineer. Detail your design process, your technical implementation choices, and how you navigated challenges.

• Quantify Impact: Wherever possible, present metrics that demonstrate the success of your work (e.g., improved conversion rates, reduced bounce rates, increased user satisfaction, performance gains).

• Address LeSS & Maturity: If applicable, explain how your work facilitated cross-team collaboration or helped elevate UX standards within a team or organization.

Challenge Preparation:

• Design Thinking: Refresh your knowledge of design thinking frameworks, user-centered design principles, and common UX research methods.

• Modern Frontend: Ensure you are up-to-date with the latest best practices, tools, and common patterns in your primary JavaScript framework. Practice coding common UI components or small features.

• LeSS Principles: Understand the core principles of LeSS, such as feature teams, overall process optimization, and the roles involved. Be prepared to discuss how you'd contribute to its success.

📝 Enhancement Note: Interview preparation advice is tailored to the specific requirements of the role, including the hybrid nature, LeSS framework, and the company's values, drawing on common interview practices for senior engineering and UX roles.

📌 Application Steps

To apply for this operations position:

• Submit your application through the provided link on the knowmad mood teamtailor platform.

• Tailor Your Resume: Highlight your quantifiable achievements in both UX design and frontend development. Use keywords from the job description such as "Product Experience," "UX Design," "Frontend Development," "LeSS," "Agile," "Design Systems," and "Stakeholder Management."

• Prepare Your Portfolio: Ensure your portfolio is up-to-date and clearly showcases 1-2 strong case studies that demonstrate your hybrid skills, problem-solving approach, and impact. Be ready to discuss your process and rationale in detail.

• Research knowmad mood: Familiarize yourself with the company's mission, values, industry focus (digital transformation), and any recent projects or news. Understand how your skills align with their goals.

• Practice Your Pitch: Be ready to articulate your experience, your approach to UX and frontend, and your understanding of scaled agile environments like LeSS. Prepare specific examples that illustrate your contributions and ability to influence teams.

⚠️ 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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