UX Designer, AI App

ActAI; España; On-site; EUR 45,000 - 75,000; Full time

Job summary

ActAI seeks a User Experience Designer to own the UX of its core app experience across iOS, Android, and web. You will shape end-to-end flows for AI-assisted tasks, balancing user needs with AI system behavior to ensure clarity, reliability, and control.

You will work with product, engineering, and ML teams to define requirements, conduct usability research, and deliver wireframes, flows, and high-fidelity designs ready for implementation.

Qualifications

• Experience designing consumer mobile or web apps.
• Strong portfolio demonstrating end-to-end UX design.
• Proficiency in user research and translating findings into design decisions.

Responsibilities

• Own UX for ActAI's core app surfaces across iOS, Android, and web.
• Design complete user flows for AI-assisted tasks from intent to completion.
• Design how the app surfaces AI actions, decisions, and required user confirmations.
• Map and design AI states: loading, thinking, acting, waiting, completing, stalling, failing, recovering.
• Collaborate with product, engineering, and ML teams to translate requirements into design solutions.
• Conduct usability research to understand trust, uncertainty, and disengagement.
• Produce wireframes, user flows, and high-fidelity designs for engineering.
• Contribute to design system and patterns for AI surfaces.
• Design for simple daily interactions and complex multi-step AI workflows.

Skills

UX design

User flows

Wireframing

Figma

Prototyping

Research

Tools

Figma

InVision

Job description

There are over 5 billion users using basic applications today such email, notes, tasks, calendar and they're not AI-native. Our mission is to build proactive applications for anyone in the world, who are not used to complex prompting. We aim to bring intelligence to conversations, errands, organising and workflows, with minimal prompting.

Our product focuses on achieving high reliability for long-running workflows, persistent context, and real-world task completion. We believe products will greatly reduce hallucinations

Our objective is to organise anyone's life, allowing us all to spend time on valuable and meaningful things

Role

You will own the UX of ActAI's core app experience. This means designing the end-to-end flows users go through every day - how they start tasks, how they follow along as the AI works, how they stay in control, and how they recover when something goes wrong.

This is a UX role for a HCI product. You need to understand both user needs and AI system behavior well enough to design product flows that feel clear, reliable, and controllable.

What You'll Be Doing

• Own UX for ActAI's core app surfaces across iOS, Android, and web.
• Design complete user flows for AI-assisted tasks - from intent capture through to task completion, including handoff, progress tracking, and error recovery.
• Design how the app surfaces what the AI is doing, what decisions it has made, and what the user needs to confirm or adjust.
• Map and design the full range of AI states a user encounters - loading, thinking, acting, waiting, completing, stalling, failing, and recovering.
• Work with product, engineering, and ML teams to define user requirements and translate them into concrete design solutions.
• Conduct usability research to understand where users lose trust, feel uncertain, or disengage.
• Produce wireframes, user flows, and high-fidelity designs that engineering can build from directly.
• Contribute to the design system and shared UX patterns for AI app surfaces.
• Design for both simple everyday interactions and complex multi-step AI workflows within the same product.

What You Will Need

• Experience as a UX designer on consumer mobile or web apps, with a strong portfolio.
• Solid skills in user flow design, wireframing, and high-fidelity prototyping in Figma.
• Ability to design for systems that are asynchronous, non-deterministic, and context-dependent.
• Clear thinking about user trust, control, feedback, and transparency in AI-driven product experiences.
• Experience conducting user research and turning findings into design decisions.
• Comfortable working in fast-moving teams with evolving product scope.
• Ability to balance simple consumer UX with complex AI system behavior.
• Good judgment on usability, edge cases, failure handling, and recovery flows.

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