Staff AI Product Designer

Define AI capabilities and architect agentic systems, focusing on behavior, orchestration, and system logic. Design end-to-end human-AI workflows and establish quality evaluation frameworks to ensure reliability and trust.

Responsibilities

• Define AI capabilities (the “what and why”)
• Identify and pattern match high-value opportunities for AI across the product
• Define what AI should do—and just as importantly, what it should not do, making hard or unpopular calls when needed
• Set clear boundaries for autonomy vs human control
• Design AI behavior, orchestration, and system logic
• Architect AI-driven workflows and agentic systems that operate across real-world scenarios and over time, including multi-step and agent-to-agent interactions
• Establish decision frameworks: when systems should act, ask, escalate, or defer
• Design for uncertainty, failures, and edge cases as core system behavior
• Develop and apply design principles and heuristics to shape how AI systems behave and make decisions
• Ensure systems remain coherent and predictable, even as complexity scales
• Shape human + AI workflows and end-to-end experience
• Design experiences for users who are increasingly managing AI systems and agents
• Define the role of the human in the loop: where users guide, review, or override
• Partner with product designers to continuously shape and adapt the product experience as underlying systems evolve
• Define quality, evaluation, and reliability
• Design evaluation scenarios and feedback loops
• Analyse outputs to identify failure modes and system weaknesses
• Design for reliability at the system level, preventing agentic breakdowns

Requirements

• Strong product judgment
• Ability to influence without authority
• Experience working on zero-to-one products and comfort operating through ambiguity and rapid change
• Deep understanding of LLMs and their limitations, along with a grounding in traditional ML approaches and when to use them instead
• Experience defining design principles, heuristics, or evaluation criteria for AI systems
• High standards for quality, with a track record of identifying where AI systems break down in real-world use
• A scientific mindset—you can design experiments that isolate variables and produce meaningful insights
• Systems thinker: you’re happier designing behaviours and flows than polishing interfaces

Benefits

• Competitive salary and equity in a fast-growing start-up
• We serve lunch every weekday, plus a variety of snack foods and a fully stocked kitchen
• Regular compensation reviews - we reward great work!
• Unlimited access to Claude Code and best-in-class AI tools; experimentation & building is encouraged & celebrated
• Pension scheme & match up to 4%
• Peace of mind with life assurance, as well as comprehensive health and dental insurance for you and your dependents
• Flexible paid time off policy
• Paid maternity leave, as well as 6 weeks paternity leave for fathers, to let you spend valuable time with your loved ones
• If you’re cycling, we’ve got you covered on the Cycle-to-Work Scheme. With secure bike storage too
• MacBooks are our standard, but we also offer Windows for certain roles when needed

Key Skills