> Markdown version of [/jobs/ext/2260439-interaction-designer-hci](https://www.wearedevelopers.com/jobs/ext/2260439-interaction-designer-hci). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Interaction Designer, HCI - **Company:** BJAK - **Location:** Greater London, UK - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Artificial Intelligence, Interaction Design, Figma - **Published:** August 26, 2026 - **Apply:** https://www.collegerecruiter.com/job/2815170134-interaction-designer-hci ## About the Role * Experience as an interaction designer or senior UX designer with strong interaction design depth. * Ability to design at the micro level - states, transitions, edge cases, and failure handling. * Strong prototyping skills in Figma or equivalent tools. * Systematic thinking - able to map complex AI behavior into coherent user-facing interaction logic. * Clear understanding of HCI principles: user control, transparency, feedback, and graceful recovery. * Experience working closely with engineers to ensure interactions are implemented as designed. * Comfort designing for systems where output is non-deterministic and behavior can vary across sessions. * Strong judgment on when users should be guided, interrupted, asked for confirmation, or left alone. ## Description A1 is building a proactive AI smart assistant for everyday users to bring intelligence to conversations, errands, organizing and workflows. Our product focuses on achieving high reliability for long-running workflows, persistent context, and real-world task completion. The system must handle multi-step reasoning, interact with external tools, and remain reliable despite non-deterministic model behavior. Role You will design the detailed mechanics of how users interact with A1 - the gestures, states, flows, and micro-decisions that determine whether an AI-driven product feels controlled or confusing. This role is focused on HCI interaction design: how users give input, receive feedback, supervise AI actions, correct mistakes, and maintain agency over AI-driven workflows. There are no established playbooks for interaction design in proactive AI products. You will help define new patterns from the ground up. What You'll Be Doing * Design detailed interaction models for AI-driven flows, including how users initiate, monitor, pause, correct, and complete multi-step tasks. * Define interaction states for AI interfaces: idle, thinking, acting, waiting, uncertain, interrupted, failed, and recovered. * Design human-in-the-loop controls - how users review AI decisions, override actions, and stay informed without micromanaging. * Create interaction patterns for delegation, approval, correction, escalation, reversibility, and recovery. * Create detailed interaction specifications, annotated flows, and prototypes for engineering handoff. * Work with product and ML teams to translate system capabilities and constraints into usable interaction patterns. * Test interaction designs with real users to identify where AI behavior creates confusion, distrust, or friction. * Contribute to a shared library of HCI interaction patterns that can be reused across the product. What You Will Need * Experience as an interaction designer or senior UX designer with strong interaction design depth. * Ability to design at the micro level - states, transitions, edge cases, and failure handling. * Strong prototyping skills in Figma or equivalent tools. * Systematic thinking - able to map complex AI behavior into coherent user-facing interaction logic. * Clear understanding of HCI principles: user control, transparency, feedback, and graceful recovery. * Experience working closely with engineers to ensure interactions are implemented as designed. * Comfort designing for systems where output is non-deterministic and behavior can vary across sessions. * Strong judgment on when users should be guided, interrupted, asked for confirmation, or left alone. ## Related Videos - [Boost Productivity with AI: Figma & Playwright MCP Workflows - Aris Markogiannakis](https://www.wearedevelopers.com/videos/1768-boost-productivity-with-ai-figma-playwright-mcp-workflows-aris-markogiannakis) - [Designing AI-first products: When the interface is no longer the product](https://www.wearedevelopers.com/videos/2062-designing-ai-first-products-when-the-interface-is-no-longer-the-product) - [Building Collaborative Open Source tools for Developers and Designers - Pablo Ruiz-Muzquiz from Penpot](https://www.wearedevelopers.com/videos/1345-building-collaborative-open-source-tools-for-developers-and-designers-pablo-ruiz-muzquiz-from-penpot) - [Edit Your Future: Queerverse Radical AI](https://www.wearedevelopers.com/videos/909-edit-your-future-queerverse-radical-ai) - [Fireside Chat with Kris Rasmussen, CTO at Figma](https://www.wearedevelopers.com/videos/982-fireside-chat-with-kris-rasmussen-cto-at-figma) - [Designing the Future of Human<>Agent Collaboration](https://www.wearedevelopers.com/videos/1447-designing-the-future-of-human-agent-collaboration) ## Related Articles - [The future is here: How artificial intelligence is influencing UX design](https://www.wearedevelopers.com/magazine/65-the-future-is-here-how-artificial-intelligence-is-influencing-ux-design) - [Navigating the AI Shift](https://www.wearedevelopers.com/magazine/629-navigating-the-ai-shift) - [10 Essential Figma Plugins for Frontend Developers in 2023](https://www.wearedevelopers.com/magazine/262-10-essential-figma-plugins-for-frontend-developers-in-2023) - [Never delegate the understanding](https://www.wearedevelopers.com/magazine/749-never-delegate-the-understanding) - [Graph and AI Trends 2026: Why Is AI Running but Not Yet Delivering?](https://www.wearedevelopers.com/magazine/680-graph-and-ai-trends-2026-why-is-ai-running-but-not-yet-delivering) - [How to Avoid Over-Engineering](https://www.wearedevelopers.com/magazine/546-how-to-avoid-over-engineering)