Senior UX & Frontend Engineer – Product Experience (LeSS)

📍 Job Overview

Job Title: Senior UX & Frontend Engineer – Product Experience (LeSS)

Company: knowmad mood

Location: Madrid, Community of Madrid, Spain

Job Type: FULL_TIME

Category: Product Experience / UX & Frontend Engineering

Date Posted: 2026-04-29T14:08:38

Experience Level: 5-10 Years

Remote Status: 100% REMOTE

🚀 Role Summary

• Spearhead the definition and delivery of high-quality user experiences, bridging product intent with production-ready code.

• Drive complex frontend solutions, ensuring seamless integration of usability, consistency, and technical excellence.

• Act as a primary UX reference point, establishing shared principles, patterns, and best practices within a multi-team framework.

• Foster cross-functional collaboration with Product Owners and engineering teams to shape product discovery, problem definition, and key UX decisions.

• Champion the consistency of product experience across a scaled agile environment utilizing LeSS (Large-Scale Scrum) methodologies.

📝 Enhancement Note: This role is positioned as a Senior-level individual contributor with significant influence, focusing on the intersection of UX design, frontend development, and product strategy. The emphasis on LeSS and influencing multiple teams without formal authority indicates a need for strong agile process understanding and exceptional communication/coaching skills.

📈 Primary Responsibilities

• Define and deliver high-quality user experiences from initial product concept through to final code deployment in production.

• Design, implement, and iterate on complex frontend solutions, ensuring adherence to usability standards, brand consistency, and robust technical architecture.

• Serve as an initial UX authority, proactively establishing and evolving shared design principles, reusable UI patterns, and best practices across development teams.

• Engage in close collaboration with Product Owners and engineering teams during the product discovery phase, contributing to problem framing, user research insights, and strategic UX decision-making.

• Ensure a unified and cohesive product experience across all touchpoints within a multi-team, LeSS-structured environment.

• Enable and coach development teams to enhance their UX capabilities, fostering progressive autonomy and a shared ownership of user experience quality.

• Contribute to the evolution and maintenance of design systems and shared component libraries.

• Actively participate in agile ceremonies, providing UX and frontend development perspectives to planning, estimation, and retrospectives.

📝 Enhancement Note: The responsibilities highlight a dual focus on hands-on technical execution (frontend development) and strategic influence (UX leadership). The emphasis on "influencing multiple teams without formal authority" and "coaching" points to a need for strong soft skills, mentorship capabilities, and a deep understanding of scaled agile frameworks.

🎓 Skills & Qualifications

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

Experience: A minimum of 5 years of experience in developing user-oriented digital products within engineering-led teams, with a proven track record of delivering complex interfaces into production. Over 5 years of applying UX principles and product experience directly to delivery is crucial.

Required Skills:

• 5+ years of experience in user-oriented digital product development.

• Hands-on, production-level frontend development expertise.

• 5+ years of applying UX principles and product experience directly in delivery.

• Proven experience acting as a primary UX resource in lower-maturity organizations or early-stage initiatives.

• Strong collaboration skills with Product Owners and stakeholders in product discovery and definition.

• Experience influencing and enabling multiple teams without direct authority (coaching, pairing).

• Experience in scaled agile environments (LeSS or similar multi-team frameworks).

• Fluent spoken and written English.

Preferred Skills:

• Experience contributing to or evolving design systems and shared UX principles.

• Familiarity with modern JavaScript frameworks (e.g., React, Vue, Angular).

• Knowledge of accessibility standards (WCAG) and implementation.

• Experience with user research methodologies and usability testing.

• Proficiency in utilizing design and prototyping tools (e.g., Figma, Sketch, Adobe XD).

• Understanding of product analytics and data-driven decision-making for UX improvements.

📝 Enhancement Note: The emphasis on "applying principles of UX and experience of product directly in the delivery" suggests that candidates should have tangible examples of how their UX contributions have materialized in shipped code and improved user journeys, not just conceptual design work. The requirement for LeSS experience is a strong differentiator.

📊 Process & Systems Portfolio Requirements

Portfolio Essentials:

• Demonstrable case studies showcasing the end-to-end delivery of complex digital products, from initial user research and problem definition through to frontend implementation and post-launch iteration.

• Examples of how UX principles were applied to solve specific business or user problems, with clear articulation of the problem statement, proposed solution, and user impact.

• Evidence of contributions to design systems, component libraries, or shared UI patterns, illustrating scalability and consistency.

• Documentation of collaboration with engineering and product teams, highlighting contributions to agile ceremonies and decision-making processes.

Process Documentation:

• Showcase examples of how you have defined and documented UX principles, design patterns, or frontend best practices for adoption by multiple teams.

• Illustrate your approach to product discovery, including methods for user research, problem definition, and collaborative ideation with cross-functional stakeholders.

• Provide examples of how you have facilitated or coached teams in adopting new UX or frontend development processes, emphasizing iterative improvement.

📝 Enhancement Note: For this role, a portfolio should not only showcase design and code but also the candidate's ability to integrate UX and frontend development within a scaled agile framework like LeSS. It should highlight their role in enabling other teams and fostering a culture of user-centricity and technical quality.

💵 Compensation & Benefits

Salary Range: Based on industry benchmarks for Senior UX & Frontend Engineers in Madrid, Spain, with significant remote work experience and expertise in LeSS, the estimated annual salary range would be €55,000 - €75,000. This estimate accounts for the senior level, specialized skills, and the high demand for remote talent in Spain.

Benefits:

• Indefinite contract (Contrato Indefinido)

• 100% Remote work arrangement

• Internal training programs and access to certifications

• Flexible compensation plan:

  • Health insurance
  • Transportation allowance
  • Childcare vouchers
  • Restaurant vouchers

• Referral program ("Plan amigo") with bonuses for successful recommendations

• Participation in company events, meetups, TechDays, and other knowledge-sharing sessions.

Working Hours: Standard full-time working hours are expected, likely around 40 hours per week, with flexibility to accommodate remote work and international team collaboration. Specific hours will be aligned with standard business operations in Spain (CET timezone).

📝 Enhancement Note: The salary range is an estimate based on typical compensation for senior technical roles in Spain. Actual compensation may vary based on the candidate's specific experience, negotiation, and the company's internal compensation structure. The benefits package is comprehensive, with a strong emphasis on professional development and work-life balance.

🎯 Team & Company Context

🏢 Company Culture

Industry: Digital Transformation and Technology Consulting. knowmad mood operates at the forefront of digital innovation, helping clients navigate complex technological landscapes through sustainable development and cutting-edge solutions.

Company Size: Over 3,000 employees. This indicates a large, established organization with significant resources, a broad client base, and a structured approach to talent development and project delivery.

Founded: The founding date is not explicitly stated, but the company's description suggests it is a well-established player in the digital transformation space.

Team Structure:

• The role is part of a larger engineering and product development function, likely distributed across multiple Scrum teams operating within a LeSS framework.

• This Senior UX & Frontend Engineer will likely report to an Engineering Manager or Head of Product/Design, but will work closely with multiple Product Owners and development teams.

Methodology:

• The company emphasizes agile methodologies, specifically mentioning LeSS (Large-Scale Scrum) for multi-team coordination.

• A strong focus on innovation, digital transformation, and sustainable development guides their approach to client projects.

• Values include collaboration, innovation, commitment, fun, and trust, suggesting an environment that encourages open communication and shared problem-solving.

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

📝 Enhancement Note: The company's size and focus on digital transformation suggest a dynamic environment with opportunities to work on diverse and challenging projects. The explicit mention of LeSS indicates a mature approach to scaled agile development, requiring candidates to be comfortable with complex team structures and interdependencies.

📈 Career & Growth Analysis

Operations Career Level: This role is a Senior Individual Contributor, primarily focused on technical execution and strategic influence within product development. It sits at a level where deep expertise in UX and frontend development is expected, along with the ability to guide and mentor others.

Reporting Structure: This individual will likely report to a functional lead (e.g., Engineering Manager, Head of UX/Product) but will operate within a matrixed structure, collaborating closely with multiple Product Owners and Scrum teams under the LeSS framework.

Operations Impact: The role has a direct impact on the quality and usability of digital products, influencing customer satisfaction, adoption rates, and ultimately, business outcomes for knowmad mood's clients. By setting high standards and enabling teams, this role contributes to the overall success and reputation of the company's digital transformation services.

Growth Opportunities:

• Technical Specialization: Deepen expertise in advanced frontend technologies, specific UX research methodologies, or performance optimization.

• Leadership & Mentorship: Transition into a Tech Lead or UX Lead role, formally mentoring junior engineers and designers, or taking on more architectural responsibilities.

• Cross-functional Expertise: Develop a broader understanding of product management, backend systems, or DevOps practices to become a more holistic product professional.

• Client-Facing Roles: Move into roles that involve direct client engagement, consulting, or solution architecture for digital transformation initiatives.

• Process Improvement: Lead initiatives to refine and improve the company's agile development processes, particularly concerning UX integration and cross-team collaboration.

📝 Enhancement Note: The growth path for this role leans towards deepening expertise in UX/Frontend, taking on more formal leadership responsibilities within agile teams, or broadening the scope of influence across different functional areas or client projects. The emphasis on LeSS suggests opportunities to become an expert in scaled agile product development.

🌐 Work Environment

Office Type: Primarily a remote-first organization, with the option for employees to work from designated "hubs" or offices in Spain if preferred. The company culture supports flexibility and autonomy.

Office Location(s): While the role is 100% remote, the company has a physical presence, with a listed address in Madrid, Spain (Plaza de la Independencia, 28001). This implies a Spanish operational base and alignment with European time zones.

Workspace Context:

• The remote setup necessitates a self-disciplined and collaborative approach. Expect to utilize digital collaboration tools extensively for communication, design reviews, and code reviews.

• The work environment is likely fast-paced and project-driven, with a strong emphasis on agile principles and continuous delivery.

• Opportunities for interaction will come through virtual team meetings, cross-team syncs within the LeSS framework, and company-wide virtual events.

Work Schedule: Full-time, aligning with standard business hours in Spain (CET). The remote nature offers flexibility, but consistent availability for core team collaboration and meetings is essential.

📝 Enhancement Note: The "100% REMOTE" status is a significant draw. Candidates should be comfortable with self-management and proficient in using a range of digital collaboration tools. The company's Spanish headquarters suggests a culture that may still value in-person connections, even with a remote-first policy, and adherence to European work norms.

📄 Application & Portfolio Review Process

Interview Process:

• Initial Screening: A review of your CV and portfolio to assess alignment with the core requirements, particularly UX/frontend experience and LeSS familiarity.

• Technical & UX Interview: A discussion focusing on your practical experience in frontend development, your approach to UX design and product experience, and your understanding of user-centered principles. Expect to discuss specific projects and technical challenges.

• LeSS & Collaboration Interview: An interview focusing on your experience with scaled agile frameworks (LeSS), your ability to influence teams without direct authority, and your collaboration style with Product Owners and engineers. This may involve situational questions.

• Portfolio Presentation/Case Study: You will likely be asked to present a selection of your work, focusing on a specific project that demonstrates your end-to-end product experience delivery, problem-solving skills, and impact.

• Final Interview: A discussion with a senior leader to assess cultural fit, long-term aspirations, and final alignment with the company's vision and values.

Portfolio Review Tips:

• Curate Strategically: Select 2-3 projects that best showcase your journey as a Senior UX & Frontend Engineer, emphasizing the integration of design and code.

• Tell a Story: For each project, clearly articulate the problem, your role, the process you followed (discovery, design, implementation, iteration), the technologies used, and the measurable outcomes or impact.

• Highlight LeSS/Scaled Agile: If possible, include projects where you worked in scaled agile environments, detailing how you navigated multi-team dependencies and ensured UX consistency.

• Showcase UX Principles in Code: Demonstrate how you translate UX research and design thinking into tangible frontend solutions. Show code snippets or discuss technical implementation challenges and solutions.

• Quantify Impact: Whenever possible, use data, metrics, or user feedback to demonstrate the success and business value of your work.

Challenge Preparation:

• Be prepared for a potential coding challenge or a design exercise that simulates real-world scenarios. These might involve building a small component, refactoring code, or sketching out a user flow for a given problem.

• Practice articulating your thought process clearly and concisely, as interviewers will be assessing not just the solution but also your problem-solving methodology.

• Research knowmad mood's projects, values, and their approach to digital transformation to tailor your responses and demonstrate genuine interest.

📝 Enhancement Note: The interview process is likely to be thorough, assessing both technical proficiency and agile/collaborative capabilities. A strong portfolio, coupled with the ability to articulate your contributions within a LeSS framework, will be critical for success.

🛠 Tools & Technology Stack

Primary Tools:

• Frontend Frameworks/Libraries: Expect proficiency in modern JavaScript frameworks such as React, Vue.js, or Angular. Expertise in one or more is likely required.

• HTML/CSS/JavaScript: Deep understanding of core web technologies is foundational.

• Version Control: Git and platforms like GitHub, GitLab, or Bitbucket are standard.

• Build Tools: Familiarity with Webpack, Vite, or similar module bundlers.

Analytics & Reporting:

• Product Analytics: Experience with tools like Google Analytics, Amplitude, Mixpanel, or Pendo for tracking user behavior and product performance.

• User Feedback Tools: Familiarity with tools for collecting user feedback, surveys, or usability testing results.

CRM & Automation: While not directly a CRM role, understanding how frontend products integrate with backend systems and potentially customer-facing data is beneficial. Knowledge of API integrations and data flow is important.

Design & Prototyping:

• Design Tools: Proficiency in Figma, Sketch, Adobe XD, or similar for wireframing, prototyping, and UI design.

• Design Systems: Experience working with or contributing to design systems.

📝 Enhancement Note: The technology stack will likely be modern and focused on delivering scalable, user-friendly web applications. Candidates should be prepared to discuss their experience with specific frameworks and their approach to building maintainable, high-performance frontend code.

👥 Team Culture & Values

Operations Values:

• Collaboration: A strong emphasis on working together across disciplines, especially between UX, frontend, Product Owners, and other engineering teams within the LeSS structure.

• Innovation: A drive to explore new technologies, methodologies, and creative solutions to meet client needs in digital transformation.

• Commitment: Dedication to delivering high-quality products and achieving project goals for clients.

• Fun: An inclusive and enjoyable work environment that fosters creativity and positive team dynamics.

• Trust: A foundation of trust among team members, enabling autonomy, open communication, and shared responsibility.

Collaboration Style:

• Cross-functional Integration: Seamless collaboration between UX designers, frontend developers, backend engineers, and Product Owners is paramount, especially within the LeSS framework to ensure alignment and consistency.

• Process Improvement Culture: An environment that encourages feedback, iterative refinement of processes, and continuous learning from both successes and failures.

• Knowledge Sharing: Active participation in meetups, tech talks, and internal forums to share expertise and learn from peers across the organization.

📝 Enhancement Note: The company culture appears to be a blend of agile pragmatism and a people-centric approach, valuing both technical excellence and a positive, collaborative work environment. Candidates should be prepared to demonstrate how they embody these values in their daily work.

⚡ Challenges & Growth Opportunities

Challenges:

• Balancing UX and Technical Constraints: Effectively translating ideal UX visions into feasible and performant frontend code, especially within complex or legacy systems.

• Ensuring Consistency in LeSS: Maintaining a unified product experience across multiple independent Scrum teams, requiring strong communication, shared tooling, and clear guidelines.

• Influencing Without Authority: Guiding and coaching teams towards better UX and frontend practices without direct reporting lines, requiring strong persuasion and relationship-building skills.

• Keeping Pace with Technology: Continuously learning and adapting to the rapidly evolving landscape of frontend technologies and UX best practices.

Learning & Development Opportunities:

• Advanced Frontend Techniques: Opportunities to delve into performance optimization, accessibility, emerging JavaScript frameworks, or progressive web applications.

• UX Specialization: Deepen expertise in user research, interaction design, information architecture, or UX strategy.

• Scaled Agile Expertise: Become a subject matter expert in LeSS or other scaled agile frameworks, potentially leading process improvement initiatives.

• Mentorship and Leadership: Develop coaching skills and take on leadership roles within development teams or technical guilds.

• Industry Exposure: Access to conferences, workshops, and certifications relevant to UX, frontend development, and agile methodologies.

📝 Enhancement Note: The challenges presented are typical for senior roles in complex, agile environments. The growth opportunities are substantial, offering pathways for both deep technical mastery and broader leadership influence within the digital transformation consulting space.

💡 Interview Preparation

Strategy Questions:

• "Describe a time you had to influence multiple development teams to adopt a new UX pattern or frontend best practice. How did you approach it, and what was the outcome?" (Focus on your influence, coaching, and communication strategies.)

• "Walk us through a complex frontend feature you delivered. What were the key UX considerations, technical challenges, and how did you ensure quality and consistency with other teams?" (Prepare a case study that highlights your end-to-end delivery process and problem-solving.)

Company & Culture Questions:

• "Why are you interested in knowmad mood and our approach to digital transformation?" (Research the company's values, mission, and recent projects.)

• "How do you see yourself contributing to our culture of collaboration and innovation?" (Align your personal values and work style with the company's stated values.)

Portfolio Presentation Strategy:

• Structure: Organize your presentation logically: Introduction (problem), Your Role, Process (Discovery -> Design -> Implementation -> Iteration), Key Decisions/Challenges, Outcomes/Impact, Tools Used.

• Visuals: Use clear, concise visuals (screenshots, wireframes, code snippets) to support your narrative.

• Metrics: Quantify success with data where possible (e.g., conversion rate improvement, task completion time reduction, user satisfaction scores).

• LeSS Context: If applicable, specifically mention how your work integrated with or influenced other teams in a scaled agile setup.

• Conciseness: Be mindful of time; focus on the most impactful aspects of your work.

📝 Enhancement Note: Interview preparation should focus on demonstrating your dual expertise in UX and frontend development, your ability to thrive in a scaled agile (LeSS) environment, and your capacity to influence and collaborate effectively across teams.

📌 Application Steps

To apply for this Senior UX & Frontend Engineer position:

• Submit your application through the provided link on the knowmad mood careers page.

• Tailor your resume: Highlight your experience with user-oriented product development, hands-on frontend delivery, UX principles, and scaled agile frameworks like LeSS. Use keywords from the job description.

• Curate your portfolio: Select 2-3 strong case studies that showcase your end-to-end product experience delivery, problem-solving, and impact. Ensure your portfolio clearly demonstrates your UX and frontend development capabilities and, if applicable, your experience within multi-team environments.

• Prepare for technical and behavioral interviews: Practice discussing your technical skills, UX process, and how you collaborate and influence within agile teams. Be ready to present your portfolio effectively.

• Research knowmad mood: Understand their mission, values, and approach to digital transformation to articulate your fit and interest during the interview process.

⚠️ 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.

---