UI Designer

As part of the evolution of our clients business applications, we are seeking a UI Designer to create user-friendly, consistent, and accessible interfaces. This position is a consultancy mission at a client site representing Keystone Solutions, where you will collaborate closely with business, product, and development teams., * Design the visual identity of interfaces, high-fidelity mockups, and interactive prototypes.

• Ensure graphic consistency, digital accessibility (WCAG standards), and adaptability (responsive design) of applications.
• Translate user journeys and wireframes into final interfaces ready for development.
• Create, maintain, and evolve the Design System and UI standards.
• Actively participate in user testing and contribute to the synthesis of results to optimize interfaces.
• Collaborate with Product Owners, Business Analysts, UX Designers, and development teams in an Agile environment.
• Integrate the framework provided by management, enterprise architects, or business analysts into visual design.

• Proven experience in UI Design for web or business applications.
• Mastery of Agile methodologies (Scrum, Kanban).
• Excellent communication, listening, and collaboration skills with developers (UI hand-off).
• Ability to translate concepts and functional journeys into clear, modern, user-centered visual interfaces.
• Expertise in creating graphic charters, typography, iconography, and interface components (UI kits).
• Mastery of composition rules, color theory, and visual hierarchy.
• Skills or sensitivity in UX Design (user research, wireframing) are a major asset.