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# Product Designer (UX/UI)

- **Company:** HASH
- **Location:** London, UK
- **Experience:** Expert
- **Salary:** £70,000.0 - £110,000.0
- **Contract:** Permanent contract
- **Skills:** Artificial Intelligence, Data Analysis, Collaborative Software, Interaction Design, Web Content Accessibility Guidelines, Web Applications, Website Wireframe, Modern Ui, Pixel Perfect, Material UI, Figma, Front End Software Development
- **Published:** September 18, 2026
- **Apply:** https://www.adzuna.co.uk/jobs/details/5889028284

## About the Role

* Demonstrable experience designing complex web apps with a modern design-system mindset
 * Advanced mastery of Figma: beyond ordinary component libraries, variants, tokens, shared styles, and auto-layout
 * Strong visual craft (typography, colour, grid) paired with systematic thinking
 * Comfort prototyping at multiple fidelities and presenting rationale to technical and non-technical stakeholders
 * Solid understanding of WCAG 2.2 and pragmatic accessibility techniques
 * Excellent written & verbal English; thrive in async, documentation-heavy culture

 * Experience designing data-dense products (simulations, modeling, analytics), AI-user interactions, or user-built views and models (e.g. process flows, dashboards).
 * Hands-on UX research: facilitating questionnaires/workshops, planning studies, analysing insights, turning findings into action
 * Interest in real-time collaboration (i.e. multiplayer editing) and how it shapes UX patterns

## Description

As a senior Product Designer working on Novel AI & World Modeling Interfaces you'll be the steward of our end-to-end product experience: establishing a robust Figma design system, crafting high-fidelity prototypes and production-ready designs, and partnering with engineers to ship pixel-perfect features. You'll join a cross-functional squad of UX researchers, UI designers, AI scientists, frontend developers, and product managers pushing the limits of what's possible in the browser, building systems to deliver "Safeguarded AI"., * Own our Figma design system: produce scalable components, typographic styles, tokens, and documentation for use across multiple high-calibre internal and external teams

 * Translate user stories into journey maps, wireframes, and polished UI ready for user testing cycles, and later production
 * Develop intuitive, informative interfaces which enable non-technical users to create models of real world processes, providing abstractions and assistance on top of the complexity of the underlying theory
 * Build interactive prototypes (Figma/Web) to validate flows and micro-interactions with test users
 * Facilitate design critiques and collaborate closely with engineering to ensure design intent is faithfully realized
 * Champion accessibility and inclusive design across typography, color, motion, and copy


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