Bjak

United Kingdom

Interaction Designer, HCI

FULL TIME REMOTE MID
Posted 28 days ago

Quick Summary

Role Overview

This role focuses on designing the detailed mechanics and HCI interaction patterns for a proactive AI smart assistant. You will define how users interact with, supervise, and maintain agency over complex AI-driven workflows.

Key Responsibilities

  • Design detailed interaction models for multi-step AI-driven tasks
  • Define specific interaction states like thinking and waiting for AI interfaces
  • Create human-in-the-loop controls for reviewing and overriding AI decisions
  • Develop interaction patterns for delegation and recovery from AI errors
  • Produce detailed interaction specifications and prototypes for engineering handoff
  • Collaborate with ML teams to translate system constraints into usable patterns

Requirements Snapshot

  • Proven experience as an interaction designer or senior UX designer
  • Strong prototyping skills using tools like Figma
  • Ability to design micro-level states and handle non-deterministic system behavior
  • Deep understanding of HCI principles including transparency and user control
  • Systematic thinking to map complex AI logic into coherent user flows

Expected Impact

You will help define entirely new interaction patterns for proactive AI products from the ground up. By creating intuitive controls and feedback loops, you will ensure that users feel empowered and in control of their AI assistant rather than confused by its autonomous actions.

This summary was generated from the original job posting (AI-assisted, human-reviewed). For full details, see the description below.

Job Description

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.

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.

 

How We Work

The best products today in the world were built by small, world class teams. We are a high talent density and hands-on team. We make decisions collectively, move at rapid speed, striking a balance between shipping high quality work and learning. Joining our team requires the ability to bring structure, exercise judgment, and execute independently. Our goal is to put in hands of our users a truly magical product

 

Interview process

For design roles, we expect candidates to submit a portfolio as part of the application process.

If there appears to be a fit, we'll reach out to schedule 2 rounds of interviews and a design assessment.

Applications are evaluated by our team members. Interviews will be conducted via virtual meetings and/or onsite.

We value transparency and efficiency, so expect a prompt decision. If you've demonstrated the exceptional skills and mindset we're looking for, we'll extend an offer to join us. This isn't just a job offer; it's an invitation to be part of a team that's bringing AI to have practical benefits to billions globally.

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