Product Designer Senior app mobile H/F

📍 Job Overview

Job Title: Product Designer Senior App Mobile H/F

Company: NEXTON

Location: Paris, Île-de-France, France

Job Type: Temps complet (Full-time)

Category: Product Design / User Experience

Date Posted: October 1, 2026

Experience Level: Senior (5-10 years implied)

Remote Status: On-site

🚀 Role Summary

• Drive the strategic product design for mobile applications, focusing on e-commerce performance and checkout optimization.

• Lead user research initiatives (quantitative and qualitative) to deeply understand user needs and business objectives.

• Design, prototype, and test innovative user experiences for iOS and Android platforms.

• Ensure high-quality delivery through close collaboration with Product Owners and development teams, acting as a key contributor to the Design System.

• Translate complex business and user requirements into intuitive and effective mobile app interfaces.

📝 Enhancement Note: While the title is "Product Designer Senior", the provided description and responsibilities align with a senior-level role requiring significant autonomy and strategic input, hence the implied 5-10 years of experience. The focus on e-commerce, mobile app strategy, and checkout optimization suggests a critical role in driving revenue and customer conversion.

📈 Primary Responsibilities

• Strategic Product Design: Understand and translate business and user challenges into actionable product design opportunities, contributing to the overall product strategy.

• User Research & Discovery: Conduct comprehensive user research, including data analysis, surveys, interviews, and usability testing, to identify and define user problems and expectations.

• Experience Design: Explore and design various solutions, defining measurable KPIs for each, and validate these solutions through user testing and A/B testing.

• Delivery & Quality Assurance: Collaborate closely with Product Owners and developers to ensure a smooth and high-quality delivery process, including detailed handoffs and quality assurance checks.

• Design System Management: Actively use and contribute to the Design System, ensuring consistency and adherence across all mobile app touchpoints.

• Stakeholder Collaboration: Effectively communicate design decisions, research findings, and user insights to various stakeholders, including Product Owners, business teams, and technical teams.

📝 Enhancement Note: The responsibilities emphasize a full-cycle product design approach, from strategic ideation and user discovery to detailed delivery and ongoing quality assurance. The mention of "check-out" and "e-commerce performance" indicates a direct impact on revenue generation and customer conversion funnel optimization.

🎓 Skills & Qualifications

Education: Higher education in design, computer science, or equivalent. (Bachelor's degree implied)

Experience: Minimum 6 years of proven experience as a Product Designer specifically for iOS and Android mobile applications.

Required Skills:

• Product Design Methodology: Mastery of Product Design methodologies and associated tools.

• User Experience (UX) Design: Strategic and operational expertise in UX design, with the ability to articulate complex concepts to diverse audiences.

• Mobile App Design: Proven experience designing user journeys for both iOS and Android applications.

• E-commerce & B2C: Solid professional experience in the B2C consumer sector and e-commerce, particularly with payment and checkout processes.

• User Research: Proficiency in conducting quantitative and qualitative user research (data analysis, surveys, interviews, usability testing).

• Prototyping & Testing: Experience with prototyping tools and conducting user validation through testing and A/B testing.

• Design System: Experience working with and contributing to Design Systems.

• Collaboration: Strong teamwork and collaboration skills with diverse internal teams.

• Communication: Excellent written and verbal communication skills for clear and concise presentation of analysis and results.

Preferred Skills:

• Hospitality Sector Knowledge: Familiarity with the hospitality industry.

• English Proficiency: Ability to conduct and lead presentations in English.

📝 Enhancement Note: The requirement for 6+ years of experience on mobile apps, combined with e-commerce and checkout focus, signifies a need for a seasoned professional capable of handling complex, high-impact design challenges. The preference for English communication suggests potential for international collaboration or client interaction.

📊 Process & Systems Portfolio Requirements

Portfolio Essentials:

• Mobile App Case Studies: Showcase at least 2-3 detailed case studies of significant mobile app design projects (iOS and Android), demonstrating end-to-end product design ownership.

• E-commerce & Checkout Focus: Highlight specific projects that involved optimizing e-commerce funnels, checkout processes, or payment experiences, with clear articulation of the challenges and solutions.

• User-Centric Design Process: Clearly outline your discovery process, including user research methodologies employed (e.g., interviews, surveys, data analysis) and how insights informed design decisions.

• Problem-Solving & Iteration: Demonstrate how you tackled complex user problems, iterated on designs based on feedback and testing, and measured the impact of your solutions.

• Design System Contribution: Include examples of how you've utilized or contributed to Design Systems, showcasing consistency and scalability in your work.

Process Documentation:

• Workflow Design: Examples of how you've mapped user flows, designed information architecture, and created wireframes and prototypes for mobile applications.

• User Testing & Validation: Documentation of user testing plans, methodologies, and how results were synthesized to refine designs.

• Collaboration & Handoff: Evidence of collaboration with Product Owners and developers, including detailed handoff documentation and QA processes.

📝 Enhancement Note: A strong portfolio is crucial for this role. It should not only display visual design skills but also a deep understanding of product strategy, user research, and the ability to quantify design impact, especially within the e-commerce conversion funnel.

💵 Compensation & Benefits

Salary Range: Based on the senior experience level (6+ years), location in Paris (a major European tech hub), and the critical nature of the role in e-commerce optimization, a competitive salary range is expected. For a Senior Product Designer in Paris, this typically falls between €55,000 to €75,000 gross annual salary, depending on the candidate's specific experience, portfolio, and negotiation.

Benefits:

• Dynamic Communities: Access to vibrant professional communities within NEXTON for knowledge sharing and networking.

• Professional Development: Regular Meetups and dedicated training programs to enhance skills and foster career growth.

• Employee Well-being: Participation in sports and festive events to promote a healthy work-life balance and team cohesion.

• Sustainable Mobility Package: Support for eco-friendly commuting options.

• Latest Generation Mobile Phone: Provision of a modern mobile device for professional use.

Working Hours: Full-time (40 hours per week implied), with potential for some flexibility depending on project needs and team agreements, though the role is primarily on-site.

📝 Enhancement Note: The salary estimate is based on industry benchmarks for senior product designers in Paris, considering cost of living and the tech market. The benefits listed are typical for consulting and IT services companies in France, emphasizing professional development and employee engagement.

🎯 Team & Company Context

🏢 Company Culture

Industry: Digital Transformation Consulting, IT Services (ESN), Digital Factory, and Agile/Product expertise. NEXTON operates at the intersection of consulting, creative design, and technology development.

Company Size: Over 450 experts. This indicates a medium-to-large sized organization with established processes but still agile enough to foster a dynamic environment. For operations professionals, this means potential for structured career paths, access to diverse projects, and a solid support system.

Founded: 2011. Established for over a decade, NEXTON has a proven track record and a mature understanding of the digital innovation landscape.

Team Structure:

• Cross-functional Teams: The role implies working within product teams alongside Product Owners (POs), developers, and potentially other designers.

• Expertise Hubs: Employees are specialists in digital, design, agile, product, and development, suggesting a culture of knowledge sharing and peer learning.

• Consulting Ethos: As a consultancy, there's likely a strong emphasis on client success, project delivery, and continuous professional development.

Methodology:

• Agile & Product-Centric: The company's focus on "agilité" and "produit" suggests a strong adoption of agile methodologies (Scrum, Kanban) and a product-led approach to development.

• Data-Driven Design: The emphasis on "analyse de données" and "mesurables KPIs" indicates a data-informed decision-making process for design and product strategy.

• User-Centricity: "Recherche utilisateur" and "tests utilisateurs" are core components of their design process, ensuring that user needs are paramount.

Company Website: https://www.nexton.com/ (Assumed based on domain_derived)

📝 Enhancement Note: NEXTON positions itself as a blend of consultancy and a digital factory, emphasizing innovation and expertise. For a Product Designer, this means exposure to diverse client challenges and a structured approach to problem-solving, leveraging both strategic thinking and hands-on execution.

📈 Career & Growth Analysis

Operations Career Level: Senior Product Designer. This role is positioned as a key individual contributor with significant experience, expected to lead design efforts on critical product areas (mobile app, checkout). It implies mentorship capabilities and a strategic understanding of product development.

Reporting Structure: The role involves close collaboration with POs and tech teams. The designer likely reports to a Design Lead, Head of Design, or a similar senior figure within NEXTON or the client's organization, depending on the project structure.

Operations Impact: This role has a direct and significant impact on revenue and customer conversion rates through the optimization of the e-commerce mobile app and checkout experience. The design decisions made will directly influence user engagement, satisfaction, and ultimately, business performance.

Growth Opportunities:

• Leadership Development: Potential to lead design initiatives, mentor junior designers, and take on more complex product strategy roles.

• Specialization: Deepen expertise in e-commerce, mobile UX, or specific areas of user research and A/B testing.

• Client Engagement: Develop skills in client management and strategic consulting through work on diverse client projects.

• Community Contribution: Become a leader within NEXTON's design communities, contributing to best practices and knowledge sharing.

📝 Enhancement Note: The "Senior" title combined with the specific responsibilities in e-commerce and mobile app optimization suggests a role with high visibility and potential for career advancement within NEXTON's design practice or client-side product teams.

🌐 Work Environment

Office Type: The role is described as "On-site" in Paris. This typically implies working from a physical office location, likely shared with other NEXTON employees or at a client's premises.

Office Location(s): Paris, Île-de-France, France. Specific office details are not provided, but Paris is a major metropolitan hub with excellent public transportation.

Workspace Context:

• Collaborative Spaces: Expect a dynamic work environment that encourages collaboration, likely featuring open-plan areas, meeting rooms, and dedicated project spaces.

• Tools & Technology: Access to standard design software, prototyping tools, and potentially client-specific platforms. The mention of a "latest generation mobile phone" suggests modern tech infrastructure.

• Team Interaction: Frequent interaction with Product Owners, developers, and other designers, fostering a culture of continuous feedback and knowledge exchange.

Work Schedule: Full-time (40 hours/week implied). While on-site, there might be some flexibility in daily hours depending on team agreements and project demands, but core working hours will likely be expected for team synchronization and client interaction.

📝 Enhancement Note: The on-site requirement in Paris suggests an immersive team environment where direct collaboration and spontaneous problem-solving are prioritized. This can be advantageous for complex design challenges that benefit from real-time feedback and whiteboard sessions.

📄 Application & Portfolio Review Process

Interview Process:

• Initial Screening: Review of CV and portfolio to assess relevant experience, skills, and alignment with the role's requirements.

• Portfolio Presentation & Discussion: A key stage will likely involve presenting selected case studies from your portfolio, detailing your process, rationale, and impact. Be prepared to discuss your approach to user research, problem-solving, and collaboration.

• Technical/Design Challenge: You might be asked to complete a take-home assignment or a live design exercise focused on mobile app UX or checkout optimization.

• Team/Cultural Fit Interview: Discussions with potential team members (POs, developers, other designers) to assess collaboration style, communication skills, and alignment with NEXTON's values.

• Final Interview: Potentially with a senior leader to discuss career aspirations and overall fit.

Portfolio Review Tips:

• Curate Strategically: Select 3-4 of your strongest mobile app design projects, emphasizing those with a clear e-commerce or checkout component.

• Tell a Story: For each case study, clearly articulate the problem, your role, the process you followed (research, ideation, design, testing), the challenges you faced, the solutions you implemented, and the measurable results. Use visuals effectively (wireframes, mockups, prototypes, user flows).

• Quantify Impact: Where possible, include data and metrics (e.g., conversion rate improvements, task completion rates, user satisfaction scores) to demonstrate the business impact of your design work.

• Highlight Process: Show, don't just tell. Detail your user research methods, your iterative design process, and how you collaborated with stakeholders.

• Be Ready to Defend: Be prepared to answer in-depth questions about your design decisions, trade-offs, and how you handled feedback.

Challenge Preparation:

• Understand the Context: If given a challenge, ensure you fully grasp the business objectives and user needs described.

• Time Management: Allocate your time effectively for understanding, ideation, designing, and preparing your presentation.

• Articulate Your Strategy: Clearly explain your assumptions, the design choices you made, and the rationale behind them, even if the solution is not fully polished. Focus on your thought process.

📝 Enhancement Note: The interview process will heavily rely on demonstrating practical application of product design principles and a data-driven approach to problem-solving, particularly within the e-commerce and mobile app context.

🛠 Tools & Technology Stack

Primary Tools:

• Design & Prototyping: Proficiency in industry-standard tools such as Figma, Sketch, Adobe XD, InVision, or similar for wireframing, UI design, and interactive prototyping.

• User Research Platforms: Experience with tools for user interviews, surveys, and usability testing (e.g., UserTesting.com, Lookback, Maze).

• Collaboration Tools: Familiarity with tools like Jira, Confluence, Slack, Trello for team communication, project management, and documentation.

Analytics & Reporting:

• Web/App Analytics: Experience with platforms like Google Analytics, Amplitude, Mixpanel to analyze user behavior, track KPIs, and inform design decisions.

• A/B Testing Tools: Familiarity with tools like Optimizely, VWO, or Google Optimize for experimentation and performance measurement.

CRM & Automation:

• While not directly a CRM role, understanding how design impacts CRM data (e.g., lead capture forms, user profiles) is beneficial. Experience with marketing automation platforms could be a plus if design integrates with them.

📝 Enhancement Note: Mastery of modern design and prototyping tools is essential. The ability to leverage analytics and A/B testing platforms to measure design impact is a key differentiator for senior roles in this domain.

👥 Team Culture & Values

Operations Values:

• User-Centricity: A deep commitment to understanding and serving user needs as the primary driver for all design decisions.

• Collaboration & Sharing: A culture that values open communication, constructive feedback, and knowledge sharing amongst team members.

• Data-Driven Decision Making: Emphasis on using data and insights to inform strategy, validate hypotheses, and measure success.

• Continuous Improvement: A proactive approach to identifying opportunities for optimization, innovation, and process enhancement.

• Excellence & Quality: A dedication to delivering high-quality, impactful design solutions that meet both user needs and business objectives.

Collaboration Style:

• Cross-functional Integration: Active participation in product teams, working closely with POs, developers, and business stakeholders to ensure alignment and efficient delivery.

• Iterative Design Process: Embracing a cycle of design, test, feedback, and refinement, with a willingness to adapt designs based on new learnings.

• Knowledge Exchange: Participating in design critiques, sharing best practices, and contributing to the collective growth of the design team.

📝 Enhancement Note: NEXTON's culture appears to foster a collaborative and growth-oriented environment where design is integrated into the broader product development lifecycle, with a strong emphasis on user needs and measurable outcomes.

⚡ Challenges & Growth Opportunities

Challenges:

• Balancing Stakeholder Needs: Navigating competing priorities between business objectives, technical constraints, and diverse user needs.

• Optimizing Complex Funnels: Designing intuitive and efficient experiences for critical user journeys like e-commerce checkouts, which often involve multiple steps and decision points.

• Maintaining Design Consistency: Ensuring a cohesive user experience across iOS and Android platforms while adhering to platform-specific conventions and a central Design System.

• Measuring Design Impact: Clearly attributing business outcomes (e.g., revenue, conversion) to specific design changes, especially in complex systems.

Learning & Development Opportunities:

• E-commerce Specialization: Deepen expertise in conversion rate optimization (CRO), payment gateway integrations, and loyalty programs within the e-commerce space.

• Mobile UX Trends: Stay abreast of evolving mobile UX patterns, platform updates (iOS/Android), and emerging technologies.

• Product Strategy: Develop a stronger strategic understanding of product roadmapping, market analysis, and business model innovation.

• Mentorship: Opportunity to mentor junior designers and contribute to the growth of NEXTON's design practice.

📝 Enhancement Note: The challenges are typical for senior product designers in e-commerce, requiring a blend of strategic thinking, user empathy, and technical understanding. The growth opportunities align with advancing within product design leadership and specialization.

💡 Interview Preparation

Strategy Questions:

• "Describe your process for translating complex business requirements into user-centered mobile app designs."

• "How would you approach optimizing a mobile e-commerce checkout flow to reduce cart abandonment and increase conversion rates?"

• "Tell us about a time you had to balance conflicting stakeholder demands during a product design project. How did you resolve it?"

• "What KPIs do you typically track to measure the success of a mobile app feature or an e-commerce experience?" Company & Culture Questions:

• "What interests you about NEXTON and our approach to digital innovation?"

• "How do you see yourself contributing to our design community and culture of knowledge sharing?"

• "Describe your experience working in agile environments and collaborating with Product Owners and developers." Portfolio Presentation Strategy:

• Structure: Organize your presentation logically: Introduction to NEXTON/the role, overview of your selected projects, deep dive into 1-2 key case studies, and conclusion.

• Storytelling: For each case study, clearly articulate the "Why" (problem), "What" (your role/solution), and "How" (process/impact). Use visuals to support your narrative.

• Metrics Emphasis: Highlight quantifiable results and the business impact of your design decisions. Be prepared to explain how you arrived at those metrics.

• Interactive Elements: Be ready to walk through interactive prototypes and explain user flows in detail.

📝 Enhancement Note: Be prepared to demonstrate not just design skills but also strategic thinking, problem-solving capabilities, and a data-driven approach. Show how your design work directly contributes to business objectives.

📌 Application Steps

To apply for this Product Designer position:

• Submit your application through the provided link on SmartRecruiters.

• Curate Your Portfolio: Select your most relevant case studies, focusing on mobile app design and e-commerce/checkout optimization. Ensure each case study clearly outlines the problem, your role, process, solution, and measurable results.

• Tailor Your CV: Highlight your 6+ years of experience in mobile app design (iOS/Android), e-commerce expertise, and proficiency in key design tools and methodologies. Quantify achievements where possible.

• Prepare Your Presentation: Practice walking through your portfolio case studies, focusing on clear storytelling, design rationale, and impact demonstration. Be ready to discuss your user research and A/B testing experience.

• Research NEXTON: Understand their company culture, client types, and their emphasis on digital transformation, agile, and product development. Prepare questions to ask about the team and projects.

⚠️ 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.