Interaction Designer, HCI

Summary

BJAK is on a mission to build a proactive smart assistant for everyday users. The Interaction Designer will focus on designing user interactions with AI-driven products, defining new interaction patterns and ensuring a seamless user experience.

Responsibilities

• 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

Skills

• 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

Qualifications

Must Haves

• 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