Product Designer - H/F

📍 Job Overview

Job Title: Product Designer - H/F

Company: Sunology

Location: Saint-Herblain, Pays de la Loire, France

Job Type: CONTRACTOR

Category: Product Design / UX/UI Design

Date Posted: 22 May 2026

Experience Level: Mid-Level (2-5 years)

Remote Status: Hybrid

🚀 Role Summary

• Drive the design of user-centric digital interfaces for the STREAM energy monitoring application and the Sunology e-commerce platform, ensuring high visual impact and intuitive user experiences.

• Champion the creation and evolution of a robust design system, maintaining brand consistency and efficiency across all digital touchpoints.

• Collaborate closely with product managers and engineering teams within an agile framework to translate business objectives into functional and aesthetically pleasing design solutions.

• Contribute to the overall customer journey by designing engaging marketing collateral and ensuring a cohesive brand identity across various communication channels.

• Actively participate in the full product development lifecycle, from ideation and wireframing to high-fidelity prototyping and final asset delivery.

📝 Enhancement Note: While the role is titled "Product Designer," the responsibilities strongly emphasize UX/UI design and digital interface creation, aligning with a specialized design track within product development rather than a full product management scope. The focus on visual design, wireframing, prototyping, and design systems indicates a need for a candidate with strong hands-on design skills.

📈 Primary Responsibilities

• Interface & Experience Design: Conceptualize, design, and deliver wireframes, high-fidelity mockups, and interactive prototypes for the STREAM mobile application and the Sunology e-commerce website using Figma.

• User Journey Mapping: Map and optimize user journeys across the e-commerce platform to enhance conversion rates and customer satisfaction, ensuring a seamless and engaging purchase experience.

• Design System Development: Contribute to the growth and maintenance of Sunology's design system, including defining UI components, style guides, and asset libraries to ensure brand consistency and design scalability.

• Cross-Functional Collaboration: Work in close partnership with product stakeholders to define user needs and business requirements, and collaborate with developers to ensure accurate implementation of designs.

• Agile Development Integration: Actively participate in agile ceremonies (daily stand-ups, sprint reviews, retrospectives) to provide design insights and support iterative development processes.

• Visual Identity & Brand Cohesion: Ensure visual consistency and brand integrity across all digital touchpoints, including the primary products and ad-hoc marketing materials like emails and advertisements.

• Graphic Design Support: Design and create visually appealing marketing assets, such as email campaigns and digital advertisements, to support marketing initiatives.

• User Feedback Integration: Incorporate user feedback and analytics data into design iterations to continuously improve product usability and effectiveness.

• Technical Specification Contribution: Assist in drafting functional specifications for new features and enhancements in collaboration with technical teams.

• Design Quality Assurance: Conduct graphic and functional quality assurance (QA) on developed features to ensure they meet design specifications and user experience standards.

📝 Enhancement Note: The responsibilities highlight a dual focus on user experience (UX) for the STREAM app and conversion-focused user interface (UI) design for the e-commerce site. The emphasis on Figma and design systems points to a need for a designer proficient in modern design tooling and best practices for scalable design.

🎓 Skills & Qualifications

Education: While no specific degree is mandated, a background in Graphic Design, Interaction Design, Human-Computer Interaction (HCI), or a related field is highly beneficial.

Experience: Minimum of 3 years of professional experience in Product Design, UI/UX Design, Digital Design, or a closely related role.

Required Skills:

• Figma Proficiency: Expert-level command of Figma for wireframing, UI design, prototyping, and collaborative design workflows.

• Adobe Creative Suite Mastery: Strong proficiency in Adobe Creative Suite tools (Photoshop, Illustrator) for asset creation and manipulation.

• UX/UI Design Principles: Deep understanding of user-centered design principles, information architecture, and interaction design.

• Visual Design Acumen: A keen eye for aesthetics, typography, color theory, and layout, with a proven ability to create visually impactful designs.

• Prototyping & Wireframing: Demonstrated ability to create effective wireframes and interactive prototypes to communicate design concepts.

• Design System Development: Experience in contributing to or building design systems, including component libraries and style guides.

• Agile Methodology: Familiarity with agile development processes and experience working within agile teams.

• E-commerce Design: Understanding of e-commerce best practices, conversion rate optimization (CRO) principles, and user journey design for online sales.

• Brand Consistency: Ability to maintain and extend a consistent brand identity across diverse digital products and marketing materials.

• Communication & Collaboration: Excellent verbal and written communication skills, with the ability to clearly articulate design decisions and collaborate effectively with cross-functional teams.

• Problem-Solving: Proactive and curious mindset with a strong ability to analyze complex problems and devise effective design solutions.

• Project Management: Capability to manage multiple projects simultaneously, prioritize tasks, and meet deadlines in a fast-paced environment.

Preferred Skills:

• User Research: Experience conducting user research, usability testing, and synthesizing findings to inform design decisions.

• Motion Design: Basic understanding or experience with motion design principles for enhancing user interfaces.

• Web Analytics Tools: Familiarity with tools like Google Analytics or similar platforms to understand user behavior.

• Marketing Design: Experience designing for digital marketing channels (email, social media, ads).

• Energy Sector Understanding: Interest or prior experience in the renewable energy or sustainability sector.

📝 Enhancement Note: The requirement for a portfolio is crucial. Candidates should prepare a curated selection of work demonstrating their Figma skills, UX/UI problem-solving, visual design capabilities, and experience with e-commerce or app interfaces. Highlighting projects that showcase design system contributions or complex user journeys will be particularly advantageous.

📊 Process & Systems Portfolio Requirements

Portfolio Essentials:

• Curated Case Studies: A collection of 2-4 detailed case studies showcasing your product design process, from problem definition to final solution. Each case study should clearly articulate the challenge, your role, the process undertaken, design decisions, and the impact of your work.

• Figma Project Examples: Demonstrations of your proficiency in Figma, including complex component systems, interactive prototypes, and well-organized design files.

• Visual Design Showcase: Examples highlighting your graphic design skills, attention to detail, typography, and color usage across different interfaces and marketing materials.

• UX Problem-Solving: Projects that illustrate your ability to understand user needs, conduct research (even if informal), and translate insights into effective UX solutions.

• E-commerce or App Interface Focus: Prioritize projects related to e-commerce platforms, SaaS applications, or mobile apps to demonstrate relevant experience.

Process Documentation:

• Design Process Walkthrough: Be prepared to verbally walk through your design process for specific projects within your portfolio, explaining your rationale and decision-making at each stage.

• Tooling Expertise: Clearly articulate how you leverage tools like Figma, Adobe Suite, and any prototyping tools to achieve design outcomes and collaborate effectively.

• Collaboration & Iteration: Provide examples of how you have collaborated with product managers, developers, and stakeholders, and how you incorporate feedback into iterative design improvements.

• Impact Measurement: If possible, demonstrate how your designs have contributed to measurable business outcomes (e.g., increased conversion rates, improved user engagement, reduced support queries).

📝 Enhancement Note: The emphasis on a portfolio is paramount for this role. Candidates should prepare to present their work in a way that highlights their problem-solving skills, design process, and ability to deliver impactful visual and interactive experiences. The ability to articulate the "why" behind design decisions will be key during portfolio reviews.

💵 Compensation & Benefits

Salary Range: As this is a CONTRACTOR position in France, compensation will be determined based on experience, skill level, and negotiation. Based on industry benchmarks for a Product Designer with 3+ years of experience in the Pays de la Loire region, a gross hourly rate or daily rate would be expected. A typical range for a skilled contractor in this field in France might fall between €350 - €550 per day, or an equivalent hourly rate.

Benefits:

• Health Insurance: Sunology covers 60% of health insurance costs for all eligible dependents.

• Disability Insurance: 100% coverage for disability insurance is provided.

• Profit Sharing Scheme: An equitable profit-sharing agreement (intéressement) is in place.

• Hybrid Work Arrangement: Flexibility to work remotely up to 2 days per week, with 3 days in the office.

• Professional Development: Opportunities for rapid learning and skill development within a fast-growing company.

Working Hours: The standard working hours are approximately 40 hours per week, typical for a full-time contractor role in France. The hybrid arrangement offers flexibility in managing these hours.

📝 Enhancement Note: As a contractor role, benefits like paid time off (vacation, holidays) are typically not included in the same way as permanent positions and should be factored into the daily/hourly rate negotiation. The provided benefits focus on insurance and profit sharing, which are significant additions to the compensation package.

🎯 Team & Company Context

🏢 Company Culture

Industry: Renewable Energy, Solar Technology, Digital Services. Sunology is positioned at the intersection of sustainable technology and consumer-focused digital solutions, aiming to democratize access to solar energy.

Company Size: Sunology is a growing company, though specific employee numbers are not provided in the raw data. Its rapid growth suggests an environment that is dynamic, potentially fast-paced, and offers significant opportunities for individual impact.

Founded: Founded with a mission to revolutionize energy access, Sunology was established to make solar energy accessible to everyone, challenging traditional energy models. This founding principle likely permeates its culture, fostering innovation and a drive for positive change.

Team Structure:

• Product & Design Integration: The role reports into a product-focused team, implying close collaboration with product management and engineering. The designer will likely be embedded within product squads.

• Agile Organization: Sunology operates within an agile framework, suggesting a collaborative, iterative, and team-oriented structure with regular feedback loops.

• Cross-Functional Collaboration: Designers are expected to work closely with product managers, developers, and marketing teams, indicating a highly collaborative environment where design input is valued across departments.

Methodology:

• User-Centric Design: A core methodology is likely to be user-centered design, with an emphasis on understanding customer needs and translating them into intuitive digital experiences.

• Data-Driven Iteration: The company's focus on digital products suggests a reliance on data and analytics to inform design decisions and drive continuous improvement.

• Agile Development: The adoption of agile methodologies means that processes are iterative, adaptable, and focused on delivering value incrementally.

Company Website: https://careers.sunology.eu

📝 Enhancement Note: The company's mission-driven nature ("new deal" energy, democratizing solar) suggests a culture that values purpose, innovation, and collective impact. This is a key differentiator for candidates looking for more than just a job.

📈 Career & Growth Analysis

Operations Career Level: This role is positioned as a Mid-Level Product Designer, requiring a solid foundation of experience (3+ years) and the ability to work autonomously on defined projects while also contributing to broader design system initiatives. It's a hands-on design role with opportunities to influence product direction.

Reporting Structure: The Product Designer will likely report to a Head of Product, Design Lead, or a Senior Product Manager, depending on the specific team structure. They will work within product squads alongside developers and product managers.

Operations Impact: The Product Designer's impact is directly tied to the user experience of Sunology's core digital products: the STREAM monitoring app and the e-commerce platform. Successful designs will drive customer adoption, engagement, and conversion, directly contributing to the company's mission and business objectives.

Growth Opportunities:

• Design Leadership: As the company grows, there may be opportunities to take on more senior design responsibilities, lead design initiatives, or mentor junior designers.

• Specialization: Potential to specialize further in UX research, interaction design, or visual design based on interest and company needs.

• Product Strategy Influence: With proven success, the designer can gain more influence in product strategy discussions, contributing to the roadmap and feature prioritization.

• Cross-Functional Skill Development: Exposure to agile methodologies, product management processes, and technical constraints can broaden the designer's skillset beyond pure design.

• Industry Expertise: Deepening knowledge within the renewable energy sector can open doors to specialized roles in sustainable tech companies.

📝 Enhancement Note: For a contractor role, growth opportunities might be less about traditional career ladder progression within Sunology and more about gaining valuable experience, expanding a professional network, and building a strong portfolio that can lead to future opportunities.

🌐 Work Environment

Office Type: The role is hybrid, meaning a combination of remote work and in-office presence at the Saint-Herblain location. This suggests a modern office setup designed to facilitate collaboration on in-office days.

Office Location(s): The primary office is located at 1 Chem. de la Chatterie, 44800 Saint-Herblain, France, in the Pays de la Loire region. This location offers access to a vibrant business ecosystem.

Workspace Context:

• Collaborative Hub: On office days, the workspace will likely be designed to foster collaboration, with meeting rooms, breakout areas, and open spaces for team interaction.

• Tools & Technology: Access to necessary design tools and technology will be provided, including workstations, software licenses (Figma, Adobe Suite), and reliable internet connectivity.

• Team Interaction: The hybrid model allows for focused individual work remotely and dynamic team engagement in the office, balancing deep work with collaborative problem-solving.

Work Schedule: A hybrid work schedule with up to 2 days of remote work per week. This offers flexibility while ensuring 3 days per week are spent in the Saint-Herblain office for team collaboration and in-person meetings. The standard working hours are approximately 40 hours per week.

📝 Enhancement Note: The hybrid model is a key aspect of the work environment, requiring candidates to be comfortable with both remote collaboration and in-office presence. The expectation of being in the office 3 days a week is important for team cohesion and hands-on design sessions.

📄 Application & Portfolio Review Process

Interview Process:

• Initial Application & Portfolio Review: Submit CV and, crucially, a portfolio. The hiring team will assess your skills, experience, and alignment with the role's requirements.

• Screening Call: A brief call with a recruiter or hiring manager to discuss your background, motivations, and initial fit for the role and company culture.

• Technical Interview / Design Challenge: This may involve a practical design exercise (take-home or live) or a deep dive into your portfolio, focusing on your design process, problem-solving abilities, and technical skills (Figma, etc.).

• Team/Stakeholder Interviews: Meetings with potential colleagues (Product Managers, Developers, other Designers) to assess collaboration style, communication skills, and cultural fit.

• Final Interview: Potentially a discussion with a senior leader to finalize the decision.

Portfolio Review Tips:

• Tell a Story: For each case study, clearly articulate the problem, your role, your process, the solutions you designed, and the impact. Focus on the why behind your decisions.

• Showcase Figma Mastery: Ensure your portfolio clearly demonstrates your expertise in Figma, including prototypes, design systems, and well-organized file structures.

• Highlight Relevant Work: Prioritize projects that align with e-commerce, mobile applications, or SaaS products.

• Quantify Impact: If possible, use metrics to demonstrate the success of your designs (e.g., conversion rate improvements, engagement increases).

• Be Prepared for Questions: Anticipate questions about your design choices, how you handle feedback, and your collaboration process.

Challenge Preparation:

• Understand the Context: If given a take-home challenge, thoroughly understand the brief and the company's mission.

• Focus on Process: Even if the final design is simple, clearly explain your thought process, research (even if brief), and design decisions.

• Time Management: For live challenges, manage your time effectively. It's often better to present a well-thought-out partial solution than a rushed, incomplete one.

• Communicate Clearly: Be prepared to present your work and rationale clearly and concisely.

📝 Enhancement Note: The portfolio is the most critical element of the application. Candidates should dedicate significant time to curating and presenting their best work in a professional and impactful manner, specifically highlighting their Figma skills and experience with digital product interfaces.

🛠 Tools & Technology Stack

Primary Tools:

• Figma: The core design tool for wireframing, UI design, prototyping, and collaboration. Proficiency is essential.

• Adobe Creative Suite: Photoshop and Illustrator for asset creation, image editing, and graphic design tasks.

• Prototyping Tools: While Figma has robust prototyping capabilities, experience with other tools like InVision or Principle may be beneficial.

Analytics & Reporting:

• Web Analytics: Familiarity with tools like Google Analytics or similar platforms to understand user behavior and track conversion metrics on the e-commerce site.

• User Feedback Platforms: Experience with tools for collecting and analyzing user feedback (e.g., Hotjar, survey tools).

CRM & Automation:

• CRM (Customer Relationship Management): While not a direct tool for the designer, understanding how customer data is managed (e.g., within a CRM) can inform design decisions for customer-facing applications.

• Project Management Software: Experience with tools like Jira or Trello for working within agile sprints and tracking tasks.

📝 Enhancement Note: The explicit mention of Figma and Adobe Suite positions these as non-negotiable requirements. Designers should be prepared to showcase their skills within these environments and understand how they integrate into a broader product development tech stack.

👥 Team Culture & Values

Operations Values:

• Loyalty: A commitment to the company's mission and long-term vision.

• Audacity: Encouragement to take initiative, innovate, and challenge the status quo to drive progress in the energy sector.

• Agility: The ability to adapt quickly to changing market conditions, technological advancements, and evolving customer needs.

• Team Spirit (Sens de l'équipe): A strong emphasis on collaboration, mutual support, and collective achievement.

Collaboration Style:

• Cross-Functional Integration: Designers are expected to be integral members of product teams, working closely with engineering and product management to co-create solutions.

• Iterative Feedback: A culture of continuous feedback and iteration, where designs are shared early and often, and constructive criticism is welcomed.

• Agile Mindset: Collaboration is framed within agile ceremonies, promoting open communication, shared responsibility, and rapid adaptation.

📝 Enhancement Note: The explicit articulation of core values (Loyalty, Audacity, Agility, Team Spirit) provides a strong indicator of what Sunology seeks in its employees. Candidates should consider how their personal values and work style align with these principles.

⚡ Challenges & Growth Opportunities

Challenges:

• Rapid Growth Environment: Navigating a fast-paced, scaling company requires adaptability, strong prioritization skills, and the ability to manage evolving priorities.

• Balancing UX & Conversion: Designing for both the intuitive user experience of the STREAM app and the high-conversion demands of the e-commerce platform requires a nuanced approach.

• Brand Consistency Across Products: Ensuring a unified brand experience across different digital products and marketing channels can be challenging.

• Technical Constraints: Collaborating effectively with developers means understanding and working within technical limitations while still delivering excellent design.

Learning & Development Opportunities:

• Deep Dive into Renewable Energy: Gain specialized knowledge and experience within the growing sustainable technology sector.

• Product Strategy Contribution: Opportunity to influence product roadmaps and feature development through design insights.

• Design System Expansion: Contribute significantly to the growth and maturity of Sunology's design system, a highly valuable skill.

• Agile Transformation: Hone skills in agile methodologies and cross-functional team collaboration.

📝 Enhancement Note: The challenges presented are typical of a high-growth tech company. Candidates who can demonstrate resilience, a proactive problem-solving approach, and a desire to learn will find these challenges to be significant growth opportunities.

💡 Interview Preparation

Strategy Questions:

• "Describe a time you had to balance user needs with business objectives. How did you approach it?" (Focus on your process, compromise, and outcome.)

• "How do you ensure brand consistency across different digital products and marketing materials?" (Highlight your understanding of design systems, style guides, and brand guidelines.)

• "Walk me through your process for designing a new feature for a mobile application or e-commerce site." (Detail your steps: research, ideation, wireframing, prototyping, testing, iteration.)

Company & Culture Questions:

• "What interests you about Sunology's mission and the renewable energy sector?" (Research the company's mission, values, and impact on sustainability.)

• "How do you see yourself contributing to our agile environment and team culture?" (Connect your collaboration style and values to Sunology's.)

Portfolio Presentation Strategy:

• Structure Your Narrative: For each case study, start with the problem, explain your role and process, present your solutions (visuals are key!), and conclude with the results or learnings.

• Highlight Figma Skills: Be ready to demonstrate your Figma file organization, component usage, and prototyping capabilities.

• Focus on Collaboration: Discuss how you worked with others, incorporated feedback, and iterated on designs.

• Be Concise and Engaging: Practice your presentation to be clear, engaging, and within time limits. Focus on the most impactful aspects of your work.

📝 Enhancement Note: Interviewers will be looking for a candidate who not only possesses strong design skills but also understands how to apply them within a business context, collaborates effectively, and is genuinely enthusiastic about Sunology's mission.

📌 Application Steps

To apply for this Product Designer position:

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

• Portfolio Customization: Ensure your portfolio is up-to-date, highlights your best work in Figma, and clearly showcases your UX/UI process for digital products (apps, e-commerce). Tailor the selection of case studies to emphasize relevant experience.

• Resume Optimization: Update your resume to clearly state your years of experience, key skills (Figma, Adobe Suite, UX/UI, Design Systems), and accomplishments relevant to product design. Use keywords from the job description.

• Prepare for Portfolio Walkthrough: Be ready to confidently present your portfolio, explaining your design process, decision-making, and the impact of your work. Practice articulating your rationale for key design choices.

• Company Research: Familiarize yourself with Sunology's mission, products (STREAM app, e-commerce site), and company values. Understand their position in the renewable energy market.

⚠️ 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.