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Product UI Designer at Spines. Spines: #1 Fastest-Growing Book Publishing Platform in the U.S.. At Spines, we’re rebuilding publishing for a new era: powered by technology, guided by craft, and built around the author.. Our next-generation publishing platform combines powerful AI with human expertise to help writers publish professionally across every format, language, and global market. The tools we’re developing streamline editing, design, translation, production, and distribution, making a complex process simple, scalable, and author-first.. Our mission is to make professional publishing possible for everyone, so no great story goes unheard. But what we’re really building is bigger: a platform that transforms how books are made, shared, and experienced globally.. We’re growing a team of people who want to shape the future of publishing: creators, technologists, and storytellers driven by craft, purpose, and the opportunity to make a real impact for authors and readers everywhere.. About the role: . As a Product UI Designer at Spines, you will play a central role in designing clear, efficient, and scalable user interfaces for our author-facing publishing SaaS platform. You’ll work closely with product managers and developers to craft intuitive experiences that empower authors to publish their books effortlessly. Your work will directly impact how authors interact with cutting-edge AI tools in the publishing space.. This is a . freelance. role, ideal for a designer who is highly independent, delivery-focused, and comfortable working with well-defined requirements in a fast-paced, AI-driven product environment.. WHAT YOU WILL DO:. Design efficient, user-centered interfaces for Spines.com’s SaaS products, from concept to final UI (desktop-first).. Translate product requirements, user needs, and business goals into clear, intuitive design solutions.. Create wireframes, user flows, high-fidelity mockups, and interactive prototypes in Figma.. Collaborate closely with Product Managers and developers to ensure seamless implementation.. Leverage AI-assisted design tools (e.g., Figma Make) to improve speed, consistency, and design quality.. Build, maintain and evolve design systems to ensure scalability, usability, and visual consistency across the platform.. Iterate quickly based on feedback, usability insights, and data.. Expert-level UX/UI skills with proven ability to design interfaces in Figma, including advanced use of components, variants, auto-layout, and production-ready design delivery.. Minimum 3 years of proven experience as a Product UI / UX Designer working on SaaS products.. A strong portfolio showcasing SaaS UI work, problem-solving, and design rationale.. Minimum availability - approximately 15 hours / week.. Experience using AI design tools (such as Figma Make or similar).. Solid understanding of usability, accessibility, and interaction design.. Fluent English (written and spoken).. Bonus: Experience with prompt engineering or designing AI-driven user experiences.. WHY SPINES?. Innovative Environment: Work in a dynamic and cutting-edge environment with a supportive and collaborative team.. Growth Opportunities: Significant opportunities for professional growth and advancement within a rapidly expanding company. . Impactful Work: Be a key player on a team that is revolutionizing the publishing industry with groundbreaking AI technology.. Exciting Industry: Gain valuable experience in the exciting intersection of AI and publishing.. Company Location: Argentina.