UX Engineer, HCI

Company

A1 is building a proactive AI smart assistant for everyday users to bring intelligence to conversations, errands, organising 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.

You will sit at the intersection of design and engineering, building the AI interfaces that users actually interact with. This is not a UI maintenance role. You will prototype, test, and ship new interaction patterns for AI-driven experiences where established conventions do not yet exist. This role is focused on HCI - building interfaces that make AI behavior understandable, controllable, and useful in real workflows.

• Build and prototype AI-native product interfaces across web and mobile.
• Create functional prototypes of new HCI interaction models, including streaming responses, multi-step task flows, real-time feedback loops, and system state visibility.
• Translate design concepts into working code with high attention to usability, responsiveness, and motion.
• Experiment with UI patterns that show progress, uncertainty, confidence, failure, and recovery clearly to users.
• Build interfaces that let users supervise, correct, and redirect AI behavior without micromanaging the system.
• Work closely with product, design, and ML teams to validate interaction ideas quickly.
• Contribute to frontend architecture and reusable UI components for AI product surfaces.
• Identify and fix usability, performance, and state management issues in AI-driven interfaces.

• Strong frontend engineering skills in React, Type Script, or equivalent.
• Experience building interaction-heavy or experimental interfaces.
• Strong product and UX instincts - you can tell when something is unclear or broken from a user's perspective.
• Ability to prototype rapidly in ambiguous environments with incomplete specs.
• Understanding of animation, responsiveness, frontend architecture, and UI performance.
• Interest in HCI interfaces and how to design for trust, control, transparency, and recovery.
• Comfort working at the boundary of design and engineering without clear handoffs.
• Ability to move fast while keeping the user experience clear and usable.