Human-AI Interaction Designer
FirstPrinciples · Canada
- Hybrid
- Full-time
- $120,000 / year
- Canada
Job highlights
- Design AI interfaces for scientific discovery.
- Build and ship production-quality code.
- Collaborate with researchers and engineers.
- Work in a remote-first, high-trust environment.
- Shape the future of human-AI interaction.
About the role
About FirstPrinciples
FirstPrinciples is a non-profit research organization building AI infrastructure for discovery in fundamental science. Currently, our work focuses on building systems like Theo, the AI Physicist, which is a domain-specialized system for research in fundamental physics. We’re a fast-growing, remote-first team of builders, researchers, engineers, and thinkers working across Canada, the US, the UK, and expanding globally. What brings us together is a shared curiosity about how the universe works, and a belief that we can build systems that help us explore it more effectively. We spend our time working on questions that don’t have clear answers, like how to design AI that can reason through scientific problems, and how the scientific process as a whole might evolve. This is work that sits somewhere between creativity and rigorous thinking, and often requires comfort with ambiguity and iteration. If you’re someone who enjoys tackling big, abstract problems and exploring ideas that don’t yet have a defined path forward, you’ll likely find the work here interesting.Why This Role Exists
We’re building the next version of our product and need someone who can own the experience end-to-end, from first concepts to final implementation. This role is not just about refining interfaces, but about inventing new ways for people to work with advanced AI systems: making complex model behaviour understandable, making uncertainty legible, and creating interactions that help users know what to trust, question, and do next. You’ll play a central role in defining how our AI Physicist shows up in the product, translating its capabilities into experiences that are clear, intuitive, and genuinely new. That includes exploring interaction patterns for reasoning traces and explanations, confidence and ambiguity, and steering and guidance controls. We’re looking for someone with strong product taste, sharp interaction instincts, and the ability to bring ideas to life in code, so they can move fluidly from concept to prototype to polished product experience.What You’ll Do
- Translate product ideas and AI model outputs into usable, trustworthy, and intuitive interfaces with strong visual and interaction design
- Explore novel human-AI interaction patterns, designing interfaces for reasoning traces and explanations, AI uncertainty and confidence, and model steering/guiding controls
- Develop & ship responsive, high-performance frontend code using modern frameworks
- Work closely with product, engineering, and research to rapidly iterate on ideas and prototypes
- Establish and evolve design systems, UI patterns, and frontend standards
- Balance speed and quality, knowing when to prototype quickly and when to refine
- Talk to users to iterate, continuously improving the product experience based on feedback, usage, and evolving needs
Who You Are
- Strong builder with proven experience shipping production-quality interactive products in code, using tools like React, TypeScript, and similar modern web frameworks
- Excellent product and interaction instincts; you have a portfolio that demonstrates thoughtful, high-quality UI/UX work
- Able to move fluidly between design and code, with a strong sense of ownership over the end-to-end experience
- Experience working in fast-moving, ambiguous environments where you’ve helped shape the product, not just execute against a spec
- Deep attention to detail in interaction, layout, and visual polish
- Comfortable collaborating across disciplines and translating abstract ideas into tangible product experiences
- Motivated by building something from the ground up and having a visible impact on the product
Bonus
- Experience building AI or LLM-based products
- Background or degree in HCI, interaction design, or related field
- Experience designing products for highly technical users such as researchers, engineers, analysts
- Experience with data-heavy or workflow-heavy interfaces such as notebooks, IDEs, dashboards
What You’ll Get
- The opportunity to work on foundational problems at the intersection of AI and physics
- A high-trust, low-bureaucracy environment with real ownership
- Remote-first work with flexibility in how you structure your day
- Exposure to cutting-edge ideas across AI, scientific discovery, and emerging technologies
- A culture that values curiosity, depth of thinking, and first-principles reasoning
- The chance to shape how advanced AI systems are used in scientific discovery
Key skills/competency
- Human-AI Interaction Designer
- Interaction Design
- Product Design
- Front-end Development
- React
- TypeScript
- UI/UX Design
- Prototyping
- AI Products
- User Research
Skills & topics
- Human-AI Interaction Designer
- Interaction Design
- Product Design
- UI/UX
- Front-end Development
- React
- TypeScript
- AI
- Scientific Discovery
- Remote
How to get hired
- Tailor your resume: Highlight experience in AI products, interaction design, and front-end development using React/TypeScript.
- Showcase your portfolio: Demonstrate thoughtful UI/UX work and ability to code prototypes.
- Emphasize collaboration: Detail experience working with cross-functional teams and in ambiguous settings.
- Address impact: Explain how you've shaped products and driven outcomes in previous roles.
- Prepare for technical questions: Be ready to discuss your design process and coding skills.
Technical preparation
Master React and TypeScript for front-end.,Build interactive prototypes using design tools.,Design for AI explainability and trust.,Understand AI model behavior and outputs.
Behavioral questions
Describe a time you worked in ambiguity.,How do you balance speed and quality?,How do you translate abstract ideas into products?,How do you gather and use user feedback?
Frequently asked questions
- What is FirstPrinciples looking for in a Human-AI Interaction Designer?
- FirstPrinciples seeks a Human-AI Interaction Designer with strong product taste, sharp interaction instincts, and the ability to translate complex AI model outputs into intuitive and trustworthy interfaces. You should be comfortable moving fluidly between design and code, with experience in modern web frameworks like React and TypeScript, and a portfolio showcasing high-quality UI/UX work.
- What kind of projects will a Human-AI Interaction Designer work on at FirstPrinciples?
- A Human-AI Interaction Designer at FirstPrinciples will work on defining and implementing end-to-end user experiences for advanced AI systems, specifically for their AI Physicist, Theo. This involves exploring novel interaction patterns for reasoning traces, explanations, AI uncertainty, and model steering, ultimately making complex AI behavior understandable and actionable for scientific discovery.
- Is this a remote position at FirstPrinciples?
- Yes, FirstPrinciples is a remote-first organization. This Human-AI Interaction Designer role allows for remote work, offering flexibility in how you structure your day and collaborate with a globally distributed team.
- What technologies are used by the design and engineering teams at FirstPrinciples?
- The design and engineering teams at FirstPrinciples utilize modern web frameworks, with specific mention of React and TypeScript for front-end development. Experience with these or similar technologies is expected for the Human-AI Interaction Designer role.
- How does FirstPrinciples support professional development for its Human-AI Interaction Designers?
- FirstPrinciples offers exposure to cutting-edge ideas in AI, scientific discovery, and emerging technologies. The role provides an opportunity to work on foundational problems with real ownership in a high-trust, low-bureaucracy environment, fostering growth through tackling abstract challenges and impacting product development.
- What is the expected balance between design and coding for this role?
- The Human-AI Interaction Designer role requires the ability to move fluidly between design and code. While strong product and interaction instincts are key, you are also expected to develop and ship responsive, high-performance front-end code using modern frameworks.
- What does FirstPrinciples mean by 'first-principles reasoning' in their culture?
- First-principles reasoning at FirstPrinciples means breaking down complex problems into their most fundamental truths and reasoning up from there, rather than relying on analogy or convention. This approach is valued in their culture and encourages deep thinking and innovative problem-solving, especially in the context of AI and scientific discovery.