Senior Base44 Frontend & UI / UX Engineer

Join Base44 as a Senior Frontend & UI / UX Engineer to enhance our marketplace platform. You'll lead the development of user interfaces, ensure seamless user experiences, and collaborate with designers and product managers. Your expertise will help us scale our platform effectively. About the Project We are building EG marketplace in Europe. Our focus is on creating a beautiful, intuitive, and premium user experience for customers and merchants while building a scalable product for long-term growth. We are looking for an experienced Frontend Engineer with hands-on Base44 experience to help us build a production-quality marketplace interface. Responsibilities * Build responsive and production-ready frontend interfaces in Base44 * Transform product requirements and designs into polished user experiences * Develop customer-facing and merchant-facing dashboards * Build listings, booking, checkout, profile, and account flows * Create reusable and maintainable UI components * Implement filters, search, navigation, and dynamic interactions * Collaborate with backend developers and designers * Ensure excellent performance across desktop and mobile devices * Improve usability and overall customer experience Required Experience 1. Proven production experience with Base44 2. Strong frontend architecture skills 3. Excellent UI/UX implementation abilities 4. Experience building responsive web applications 5. Experience with complex dashboards 6. Experience with marketplace or SaaS interfaces 7. Experience consuming REST APIs 8. Strong understanding of component-based architecture 9. Excellent attention to detail Nice to Have * Experience with React * Experience with Tailwind CSS * Experience with Supabase integrations * Experience with search and filtering systems * Experience with merchant dashboards * Experience with booking platforms * Experience with ecommerce or marketplace products * Experience collaborating with product designers We Value * Clean and maintainable code * Pixel-perfect implementation * Strong UX thinking * Fast communication * Ownership and responsibility * Long-term collaboration mindset When Applying Please include: 1. Links to real Base44 projects you personally built. 2. Screenshots or live demos. 3. Your exact role in each project. 4. Examples of dashboards or marketplace interfaces. 5. Examples of responsive UI implementations. 6. Availability and preferred engagement model. Applications without relevant project examples may not be considered. To confirm that you have read this posting, please begin your proposal with the words: EG Frontend and answer this question: What would be the biggest UX challenge when building a premium marketplace for beauty, wellness and experiences?