You're seeing this page as if you were . The main menu is still yours, though. Exit from immersion
Oussama S.OS

Oussama S.

Senior Product Designer / Design System Expert

€700/day
Bourg-la-Reine, FR
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
Back to original language

About Oussama

For over 13 years, I have been evolving in product design, supporting both B2B and B2C solutions. My career has allowed me to develop solid expertise in UX/UI and design systems, with one conviction: design must simplify complexity and create lasting value for both the user and the business.
I enjoy transforming strategic challenges into intuitive, coherent, and scalable experiences, combining creativity, methodology, and product vision.
  • Arabic

    Native or bilingual

  • English

    Fluent

  • French

    Native or bilingual

Can work on-site
Bourg-la-Reine (up to 50km)

Experience

  • Caisse des dépôts
    SR. Product Designer, Design System Manager
    PUBLIC SECTOR
    May 2023 - Today (3 years and 3 months)
    Paris, France
    CONTEXT:
    Mission at Caisse des Dépôts, where I contributed to digital modernization and strategic analysis projects addressing B2B challenges for public and private stakeholders, as well as B2C for end-users of territorial services. I worked on structuring and valuing data to improve decision-making, operational efficiency, and service quality, while ensuring compliance with RGAA accessibility standards. This mission allowed me to support initiatives with strong societal impact, particularly in public innovation, investment, and improving the citizen experience.

    OBJECTIVE:
    Ensure the consistency and quality of B2B and B2C interfaces as the Figma and Design System lead, ensuring compliance with RGAA accessibility standards. Integrate AI into design processes, mentor newcomers, create mockups and prototypes, and conduct user testing to improve the experience and efficiency of digital services.

    ROLE & EXPERTISE:
    • Figma lead and Design System manager, ensuring visual and functional consistency of B2B and B2C interfaces in compliance with RGAA accessibility standards.
    • Mentoring and onboarding newcomers on design tools and methodologies.
    • Creation of mockups, wireframes, and interactive prototypes for digital projects, with user testing and iterations to improve the experience.
    • Application of B2B and B2C design to structure user journeys and optimize digital services for internal teams and end-users.
    • Integration of AI to facilitate data analysis and enhance user experience through intelligent interfaces.
    • Collaboration with business and technical teams to transform functional needs into effective and impactful digital solutions.
    Figma Accessibility Data Analysis User Interface Design User Testing
  • Technologies ExPretio
    SR. Product Designer, Design System Manager
    TRANSPORTATION
    November 2021 - Today (4 years and 8 months)
    Paris, France
    CONTEXT:
    Expretio, a B2B company specializing in revenue optimization for transport operators, where I worked on Appia, their AI platform for dynamic pricing.
    I contributed to data design by structuring data models, improving the visualization of strategic information, and facilitating decision-making for business teams, while ensuring the clarity, readability, and accessibility of interfaces.
    My role helped improve demand forecasting, enhance understanding of complex data, and increase clients' commercial efficiency through more refined and better-presented data utilization.

    OBJECTIVE:
    Develop and optimize the B2B dashboards for the Appia platform by applying data design principles and leading the Design System, to make AI forecast models readable and understandable. Ensure the clarity, consistency, and accessibility of interfaces, while helping transport operators make effective and reliable data-driven decisions.

    ROLE & EXPERTISE:
    • B2B design of dashboards and interfaces for the Appia platform, dedicated to dynamic pricing and transport revenue optimization, ensuring clarity, readability, and accessibility of information.
    • Leading the Design System to ensure visual, functional, and accessible consistency across all products and interfaces.
    • Application of data design to structure, visualize, and make AI forecast models and recommendations understandable for operators.
    • Prototyping, mockups, and user testing to validate the ergonomics and understanding of complex functionalities.
    • Collaboration with business and technical teams to transform client needs into actionable and effective solutions, optimizing decision-making processes.
    User Research Design System User Testing Zeroheight Prototype
  • Breakpoint Technology
    SR. Product Designer
    DIGITAL AND IT
    October 2020 - September 2021 (1 year)
    Paris, France
    CONTEXT:
    At Breakpoint Technology as a Product Designer, I designed web and mobile interfaces for B2C and B2B projects for innovative startups. I conducted complete UX/UI design phases (user research, prototyping, and testing) to ensure a fluid, accessible, and consistent experience.
    I collaborated closely with technical teams to transform client needs into high-performing and rapidly deployable products.

    OBJECTIVE:
    Create B2B and B2C web and mobile interfaces tailored to the needs of startups, integrating client discovery, rapid prototyping, user testing, and Design System management to accelerate product development and maximize user adoption.

    ROLE & EXPERTISE:
    • Design of B2B and B2C web and mobile interfaces for innovative startups.
    • Conducting discovery phases and identifying client needs to define product priorities and objectives.
    • Creation of mockups, wireframes, and interactive prototypes to optimize user experience.
    • Performing user testing, collecting feedback, and iterating to improve user journeys and ergonomics.
    • Managing and updating the Design System to ensure visual and functional consistency of products.
    • Collaboration with technical teams to transform client needs into high-performing digital solutions.
    MVP Figma Design System Agile Method Product Discovery

Recommendations

Be the first to recommend Oussama

Help this freelancer shine by sharing your experience working together.

These freelancer profiles also match your criteria

AgathaA

Agatha Frydrych

Backend Java Software Engineer

4.7

(3)

2

BaptisteB

Baptiste Duhen

Fullstack developer

4.6

(4)

5

AmedA

Amed Hamou

Senior Lead Developer

4

(2)

7

AudreyA

Audrey Champion

Web developer

4.3

(3)

4

Education

  • Bachelor's degree in Computer Science, specializing in Multimedia and Computer Science
    Higher Institute of Multimedia Arts
    2011

Skill set

Categories