Senior UI/UX Designer

Molecule and BIO.xyz are building the foundation of Decentralized Science (DeSci), where biotech meets web3. Molecule provides infrastructure to turn intellectual property into programmable, on-chain assets through its IP-NFT framework and protocol stack. BIO.xyz is the coordination and economic layer of DeSci, powering BioDAOs through funding, governance, and ecosystem alignment. The senior Product Designer will shape the user experience and visual language of Molecule's web and mobile products, own the design system, and work closely with Product, Engineering, and Marketing teams.

Responsibilities

Design and refine the user experience and interfaces for Molecule's core applications across web and mobile, from concept to launch; Own and expand Molecule's Design System by building and maintaining a scalable, accessible component library; Deliver polished, pixel-perfect UI components that improve usability and clarity and stay aligned with the brand; Write clear component documentation, UI specs, and usage guidelines for smooth design-to-development handoff; Partner with Frontend Engineers through implementation to ensure what ships matches the design; Apply WCAG standards and UX best practices to make products inclusive and easy to use; Build interactive prototypes, often with AI-powered tools, and test them with users; Iterate on designs based on user feedback, data, and evolving product needs; Lead and facilitate design work, including setting up frameworks, running brainstorms, and presenting design decisions to stakeholders; Contribute to Molecule's broader visual identity and work with external design partners on brand assets

Requirements

7+ years of professional product or UI design experience, ideally on complex products; Built and scaled design systems and hybrid component libraries across teams, with a portfolio showing component libraries and detailed UI documentation; Figma expert with hands-on experience managing a design system in it; Understands HTML, CSS, and front-end frameworks well enough to design for feasibility; Strong grasp of interaction design for both mobile and desktop; Actively uses AI tools and AI-enhanced workflows in the design process; Ego-free and collaborative, seeks out feedback and critique; Self-sufficient, owns the design process end to end without micromanagement; Communicates clearly and can explain design reasoning to designers, engineers, and leadership

Nice to have

Has shipped AI or agent-based product experiences; Builds and tests working prototypes; Experience with design tokens and front-end design implementation; Knowledge of user testing methodologies and iterative research practices; Experience working with external design or branding agencies; Background in web3, biotech, or decentralised science

Benefits

Competitive compensation; Real ownership in a young, fast-growing team where your voice shapes both the product and the company; The chance to define the product experience of a category