UI DESIGNER Sénior H/F

📍 Job Overview

Job Title: UI Designer Senior H/F Company: NEXTON Location: Montpellier, Occitanie, France Job Type: Full-time Category: UI/UX Design Operations, Product Design Operations Date Posted: September 11, 2025 Experience Level: Senior (7+ years) Remote Status: On-site

🚀 Role Summary

• Drive the visual design and user interface (UI) strategy for high-performance mobile applications, ensuring a consistent and engaging user experience.
• Collaborate closely with cross-functional teams, including UX Designers, Product Owners, and Developers, within an agile framework to deliver innovative digital solutions.
• Champion the adherence and contribution to the company's established design system, ensuring brand consistency and efficient design processes.
• Focus on mobile-first design principles and accessibility standards to create inclusive and user-friendly interfaces for a broad customer base.

📝 Enhancement Note: While the role is explicitly for a UI Designer, its integration within a digital innovation company (NEXTON) and close collaboration with product and development teams suggests a strong need for understanding the operational aspects of design, such as design system maintenance, agile workflow integration, and accessibility compliance. This role sits at the intersection of creative design and operational efficiency in product development.

📈 Primary Responsibilities

• Lead the design and implementation of visually appealing and high-performance user interfaces for mobile applications, adhering to mobile-first principles.
• Actively contribute to and maintain the coherence of the existing design system by crafting and integrating graphical elements and components.
• Collaborate with UX designers, product owners, and developers in agile rituals to ensure seamless product development cycles and iterative improvements.
• Focus on the continuous design and enhancement of products intended for end-users, ensuring a user-centric approach throughout the design lifecycle.
• Apply a keen eye for detail to ensure design consistency across all application interfaces and user flows.
• Champion accessibility best practices, ensuring all designed interfaces meet or exceed relevant accessibility standards.
• Proactively challenge existing designs and propose innovative solutions to enhance user experience and product effectiveness.

📝 Enhancement Note: The responsibilities emphasize direct contribution to product design and iterative improvement within an agile environment. This points to a need for the candidate to not only possess strong visual design skills but also a solid understanding of product development lifecycles, cross-functional collaboration dynamics, and the operational impact of design decisions on development timelines and product quality.

🎓 Skills & Qualifications

Education: While not explicitly stated, a degree in Graphic Design, Interaction Design, Human-Computer Interaction, or a related field is typically expected for a Senior UI Designer role. Experience: A minimum of 7 years of professional experience as a UI Designer, with a demonstrated focus on mobile application design and a strong portfolio showcasing relevant projects.

Required Skills:

• Proven expertise in UI Design, with a strong emphasis on mobile application interfaces.
• Mastery of core design principles, including mobile-first and responsive design.
• Proficiency in industry-standard design tools such as Figma, Sketch, Adobe XD, Invision, and Zeplin for interface creation and prototyping.
• Deep understanding and practical experience working with design systems, including component-based design and style guides.
• Strong user-centric approach and proactivity in identifying and solving design challenges.
• Experience working within agile development methodologies and participating in agile rituals.
• Excellent communication and collaboration skills to effectively work with UX Designers, Product Owners, and Developers.
• A keen eye for detail and a commitment to ensuring design consistency and aesthetic quality.
• Sensitivity to and understanding of web and mobile accessibility standards.

Preferred Skills:

• Foundational knowledge of HTML and CSS, enabling better collaboration with development teams and understanding of front-end implementation constraints.
• Experience in challenging and iterating on existing design concepts to drive innovation and improvement.
• A creative and innovative mindset, with a continuous awareness of market trends, design evolution, and technological advancements.

📝 Enhancement Note: The requirement for 7+ years of experience and the emphasis on mobile-first, design systems, and agile collaboration indicate a need for a senior professional who can operate with a high degree of autonomy and contribute strategically to the product development process. The preferred HTML/CSS knowledge suggests the company values designers who understand the technical feasibility of their designs.

📊 Process & Systems Portfolio Requirements

Portfolio Essentials:

• A comprehensive portfolio showcasing a minimum of 7 years of UI Design work, with a significant focus on mobile applications.
• Case studies demonstrating a user-centric design process, from initial concept and wireframing through to high-fidelity UI design and prototyping.
• Examples of contributions to or creation of design systems, illustrating component usage, style guide adherence, and scalability.
• Projects that highlight a mobile-first approach and demonstrate an understanding of platform-specific design conventions (iOS/Android).
• Evidence of collaboration with UX designers and developers, showing how designs were translated into functional products.
• Demonstrations of problem-solving skills, including how design challenges were overcome and how designs were iterated upon based on feedback or performance data.

Process Documentation:

• Examples of how you've contributed to or maintained design system documentation, ensuring clarity and consistency for development teams.
• Case studies that illustrate your involvement in agile workflows, detailing your role in sprints, feedback loops, and iterative design processes.
• Documentation showcasing your understanding of design handoff processes, including the use of tools like Zeplin or similar platforms for collaboration with developers.
• Examples of how you consider and integrate accessibility best practices into your design process and documentation.

📝 Enhancement Note: For a senior role, the portfolio is critical. It should not just display visual output but also the thought process, problem-solving methodologies, and collaborative approach. Demonstrating experience with design systems and agile processes is paramount, as these are operational aspects of modern design workflows.

💵 Compensation & Benefits

Salary Range: For a Senior UI Designer with 7+ years of experience in Montpellier, France, a competitive salary range would typically fall between €45,000 to €60,000 gross per year. This range can vary based on specific skills, the depth of experience, and the negotiation during the interview process.

Benefits:

• Dynamic Communities: Opportunities to connect and learn within specialized professional groups.
• Meet Ups: Regular gatherings to share knowledge, discuss industry trends, and network.
• Training: Access to continuous learning and development programs to enhance skills and explore new areas.
• Sporting Events: Company-sponsored or organized sporting activities for employee well-being.
• Sustainable Mobility Package: Support for eco-friendly commuting options.
• Latest Generation Phone: Provision of a current-model mobile phone for professional use.

Working Hours: The standard working hours are likely based on a full-time, 35-40 hour work week, typical for France, with potential for some flexibility depending on project needs and team coordination.

📝 Enhancement Note: The listed benefits highlight a company culture that values employee development, well-being, and community engagement, which are important considerations for long-term career satisfaction. The salary estimate is based on current market data for senior design roles in a major French city like Montpellier.

🎯 Team & Company Context

🏢 Company Culture

Industry: Digital Transformation, IT Consulting, and Digital Services (ESN - Entreprise de Services du Numérique). NEXTON operates at the intersection of consulting, creative agency, and IT services, enabling clients to innovate and evolve digitally. Company Size: Over 450 experts. This indicates a medium to large-sized company with established processes and a significant market presence, offering opportunities for structured career growth and exposure to diverse projects. Founded: 2011. Founded relatively recently, NEXTON likely maintains a dynamic and forward-thinking culture, blending the agility of a startup with the stability of an established firm.

Team Structure:

• The UI Designer will be embedded within product teams, working closely with UX Designers, Product Owners, and Developers.
• This structure promotes a highly collaborative and cross-functional environment, typical of agile product development.
• The role likely reports to a Design Lead or a Product Manager, with opportunities to interact with other senior designers and stakeholders across the organization.

Methodology:

• Agile methodology is central to the team's workflow, requiring iterative design processes, participation in sprint planning, reviews, and retrospectives.
• Data-driven decision-making is implied through the focus on performance and continuous improvement of products.
• Design system adherence and contribution are key operational processes to ensure design consistency and efficiency.

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

📝 Enhancement Note: The company culture at NEXTON appears to be a blend of consulting expertise, creative agency dynamism, and IT service efficiency. The size suggests a supportive environment with ample resources for professional development, while the founding date implies a modern and adaptable approach to business and technology.

📈 Career & Growth Analysis

Operations Career Level: This is a Senior UI Designer role, indicating a significant level of autonomy, expertise, and responsibility. The individual is expected to lead design initiatives, mentor junior designers if applicable, and influence design strategy within project teams. Reporting Structure: The Senior UI Designer will likely report to a Head of Design, Design Manager, or a Product Lead. They will collaborate daily with UX Designers, Product Owners, and Software Developers, forming a core part of agile product development teams. Operations Impact: The role has a direct impact on the usability, aesthetic appeal, and overall success of mobile applications. By ensuring high-quality UI design, the designer contributes to user satisfaction, adoption rates, and ultimately, the client's business objectives. Effective design system management also streamlines development, reducing time-to-market and operational costs.

Growth Opportunities:

• Skill Specialization: Deepen expertise in mobile UI design, interaction design, design systems, or accessibility.
• Leadership Tracks: Transition into a Lead UI Designer role, managing a team of designers, or move into Product Design leadership positions.
• Cross-functional Development: Gain experience in product management or UX strategy through close collaboration with these functions.
• Industry Exposure: Work on diverse projects for major clients (SNCF, Orange, BNP Paribas), broadening industry knowledge and portfolio breadth.
• Mentorship: Opportunity to mentor junior designers and contribute to the growth of the design community within NEXTON.

📝 Enhancement Note: The senior level implies a trajectory towards leadership or specialized expertise within the design operations framework. Growth opportunities are tied to both technical skill enhancement and the development of leadership and strategic thinking capabilities, all within the context of delivering operational excellence in product design.

🌐 Work Environment

Office Type: NEXTON is an IT services and consulting company, so the work environment in Montpellier is likely a modern office space designed for collaboration and focused work. Office Location(s): Montpellier, France. This city is a hub for technology and innovation in the South of France, offering a vibrant professional ecosystem.

Workspace Context:

• Collaboration is key, with an emphasis on working alongside UX Designers, Product Owners, and Developers in agile teams.
• Access to modern design tools and technologies is expected, facilitating efficient workflow and creative output.
• The office environment likely fosters a culture of knowledge sharing, continuous learning, and innovation, with opportunities for informal interactions and structured team events.

Work Schedule: Full-time employment (Temps complet), with standard working hours typical for France (e.g., 35-40 hours per week). While agile methodologies can sometimes require flexibility, the core work schedule is expected to be consistent.

📝 Enhancement Note: The work environment is designed to support collaborative product development. The emphasis on agile practices and cross-functional teams means the workspace will facilitate direct interaction and communication between designers, product managers, and engineers, crucial for efficient operations.

📄 Application & Portfolio Review Process

Interview Process:

• Initial Screening: Likely a review of CV and portfolio by a recruiter or hiring manager to assess basic qualifications and fit.
• Technical/Portfolio Review: A session where the candidate presents their portfolio, discussing past projects, design process, problem-solving approaches, and contributions to design systems and agile workflows. Expect questions on mobile-first design, accessibility, and tool proficiency.
• Team/Stakeholder Interviews: Meetings with UX Designers, Product Owners, and Developers to evaluate collaboration skills, cultural fit, and ability to integrate into agile teams.
• Final Interview: Potentially with a senior leader (e.g., Head of Design or CTO) to discuss strategic vision, career aspirations, and overall suitability for the senior role.

Portfolio Review Tips:

• Curate Select Projects: Focus on 3-5 of your strongest mobile UI design projects that demonstrate your senior-level skills and experience.
• Highlight Process & Impact: For each project, clearly articulate the problem, your role, the design process, the tools used, and the measurable impact or outcome. Emphasize your contributions to design systems and agile workflows.
• Showcase Mobile-First & Accessibility: Ensure your portfolio explicitly demonstrates your expertise in mobile-first design principles and your understanding of accessibility standards.
• Design System Contribution: If applicable, include examples of your work on design systems, showcasing your ability to create and maintain reusable components and style guides.
• Be Prepared to Discuss: Anticipate questions about your design decisions, challenges faced, how you collaborated with teams, and how you handled feedback.

Challenge Preparation:

• Design Challenge: You might be given a small design task or a case study to complete within a set timeframe. This could involve designing a specific mobile screen, improving an existing interface, or outlining a design system approach.
• Focus on Process: Even in a short challenge, demonstrate your thought process, problem-solving skills, and how you apply design principles.
• Communication: Be ready to present your solution clearly and concisely, explaining your rationale and design choices.

📝 Enhancement Note: The interview process will heavily scrutinize the candidate's practical experience, portfolio, and ability to integrate into an agile, collaborative design and development environment. Demonstrating an understanding of design operations—how design integrates with development and product strategy—will be key.

🛠 Tools & Technology Stack

Primary Tools:

• UI Design & Prototyping: Figma, Sketch, Adobe XD, Invision. Proficiency in at least one of these is essential. Figma is increasingly becoming an industry standard for collaborative design.
• Handoff & Collaboration: Zeplin, Invision (for prototyping and handoff), or similar tools to facilitate seamless communication between design and development teams.

Analytics & Reporting:

• While not core to the UI Designer role, familiarity with analytics tools (e.g., Google Analytics, Mixpanel, Amplitude) and how UI design impacts user behavior metrics would be advantageous. Understanding how to read and interpret performance data to inform design decisions is a plus.

CRM & Automation:

• Not directly relevant to the UI Designer's primary responsibilities but understanding the broader tech stack of the company and how design fits into the customer journey managed by CRM systems could be beneficial for context.

📝 Enhancement Note: The emphasis on specific design tools highlights the technical proficiency required. The mention of Zeplin and Invision points to the operational need for smooth design-to-development handoffs, a critical aspect of efficient product delivery.

👥 Team Culture & Values

Operations Values:

• User Centricity: A fundamental value, ensuring all design decisions prioritize the user's needs and experience.
• Proactivity: Encouraging initiative, problem-solving, and taking ownership of design tasks.
• Collaboration: Fostering teamwork and effective communication across disciplines (UX, Product, Dev).
• Innovation & Creativity: Valuing new ideas, exploration of trends, and pushing creative boundaries within practical constraints.
• Efficiency: Focusing on streamlined processes, design system utilization, and effective handoffs to optimize development time.
• Quality & Excellence: Maintaining high standards in design execution, attention to detail, and overall product polish.

Collaboration Style:

• Agile & Iterative: Working in short cycles, with continuous feedback and adaptation.
• Cross-functional Integration: Seamless integration with UX, Product, and Development teams, participating actively in their ceremonies and discussions.
• Constructive Feedback: Openness to giving and receiving feedback to improve designs and processes.
• Knowledge Sharing: Actively participating in communities of practice, meetups, and internal training sessions to share expertise and learn from peers.

📝 Enhancement Note: The company's values and collaboration style are deeply intertwined with agile operations. A successful candidate will need to be a team player who thrives in a collaborative, iterative, and feedback-rich environment, contributing to the overall efficiency and quality of the product development lifecycle.

⚡ Challenges & Growth Opportunities

Challenges:

• Balancing Design Excellence with Agile Velocity: Meeting tight deadlines while maintaining high design quality and adhering to design system constraints.
• Cross-functional Alignment: Ensuring consistent understanding and implementation of design vision across different teams and stakeholders.
• Evolving Design Systems: Keeping pace with the expansion and maintenance of the design system in a growing company.
• Technical Constraints: Designing within the limitations and possibilities of mobile development technologies and platforms.
• Accessibility Implementation: Ensuring robust accessibility across all features, which requires constant vigilance and adherence to standards.

Learning & Development Opportunities:

• Advanced UI/UX Workshops: Access to training on cutting-edge design techniques and tools.
• Design System Mastery: Opportunities to become a specialist in design system architecture and management.
• Product Strategy Involvement: Gaining exposure to product strategy and roadmap planning through close work with Product Owners.
• Client Interaction: Direct engagement with clients on design aspects of projects, enhancing communication and client management skills.
• Mentorship Programs: Being mentored by senior design leaders or mentoring junior designers, fostering leadership and knowledge transfer.

📝 Enhancement Note: The role offers significant opportunities for professional growth by tackling complex design challenges within a dynamic corporate environment. The challenges are typical of senior roles in fast-paced tech companies, requiring adaptability and continuous learning.

💡 Interview Preparation

Strategy Questions:

• "How do you approach designing for mobile-first, and what are the key considerations compared to desktop design?" (Focus on user experience, screen real estate, interaction patterns.)
• "Describe your experience with design systems. How do you contribute to or maintain them, and why are they important for operations?" (Highlight component-based design, style guides, consistency, efficiency.)
• "Walk us through a challenging UI design project from your portfolio. What was the problem, your process, and the outcome?" (Emphasize problem-solving, collaboration, and impact.)
• "How do you ensure accessibility in your UI designs, and what standards do you follow?" (Mention WCAG, contrast ratios, semantic structure, keyboard navigation.)
• "How do you collaborate with UX Designers and Developers in an agile environment? What are your strategies for effective handoffs?" (Discuss sprint integration, feedback loops, using tools like Zeplin.)

Company & Culture Questions:

• "What interests you about NEXTON and this specific role?" (Research the company's clients, projects, and culture.)
• "How do you stay updated with the latest design trends and technologies?" (Mention sources like design blogs, conferences, industry leaders.)
• "Describe a time you had to challenge a design decision or provide constructive criticism to a team member." (Showcase communication skills and ability to handle feedback professionally.)

Portfolio Presentation Strategy:

• Storytelling: Frame each project as a narrative, clearly outlining the problem, your role, the process, the solutions, and the results.
• Visual Clarity: Ensure your presentation is visually clean, well-organized, and highlights the key UI elements and user flows.
• Process Emphasis: Dedicate time to explaining your design process, particularly how you incorporated user feedback, design system principles, and agile methodologies.
• Impact Metrics: Quantify the impact of your designs whenever possible (e.g., improved conversion rates, reduced task completion time, increased user satisfaction).
• Tool Proficiency: Be ready to discuss your proficiency with the mentioned design tools and how you leverage their features for efficiency and collaboration.

📝 Enhancement Note: Interview preparation should focus on demonstrating not just design skill but also an understanding of operational efficiency, collaborative workflows, and the strategic value of UI design within product development. Highlighting experience with design systems and agile practices is crucial.

📌 Application Steps

To apply for this operations position:

• Submit your application through the provided link on smartrecruiters.com.
• Portfolio Customization: Tailor your portfolio to prominently feature your strongest mobile UI design projects, specifically highlighting your experience with design systems, mobile-first approaches, and agile collaboration.
• Resume Optimization: Ensure your resume clearly states your 7+ years of UI design experience and uses keywords like "UI Design," "Mobile Applications," "Figma," "Sketch," "Adobe XD," "Design System," "Agile," and "Accessibility." Quantify achievements where possible.
• Interview Preparation: Practice presenting your portfolio, focusing on explaining your design process, collaborative methods, and the operational impact of your work. Prepare specific examples for behavioral questions related to teamwork, problem-solving, and innovation.
• Company Research: Thoroughly research NEXTON, their clients, their approach to digital innovation, and their company culture to demonstrate genuine interest and alignment during the interview process. Understand their service offerings and how design contributes to their client solutions.

⚠️ 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.