Hybrid Principal Product Designer

at Perk

• Job title: Principal Product Designer
• Job type: Full Time
• Experience level: Lead
• Salary: Not specified
• Degree requirement: Bachelor's Degree
• Location requirements: Hybrid, London, United Kingdom

About the role

• Principal Product Designer on Perk's Core AI team shaping trustworthy AI integration. Partnering with multiple teams to enhance user experiences.

Responsibilities

• As a Principal Product Designer on Perk’s Core AI team, you will shape how AI is embedded across our product in a way that is trustworthy, intuitive, and genuinely useful for customers.
• Core AI is a central team responsible for building foundational AI capabilities and patterns that can be reused across Perk.
• You will partner closely with Product, Engineering, Data/ML, and Design leadership to help teams go from “we could add AI here” to clear problems, strong interaction models, validated solutions, and high-quality shipped experiences.

Requirements

• Experience: 8+ years working as a Product Designer on complex products (ideally with SaaS products). Experience leading ambiguous, cross-product initiatives.
• AI product experience: Proven experience designing and shipping AI-powered experiences (LLM or ML). You understand core concepts like probabilistic outputs, hallucinations, retrieval, evaluation, latency trade-offs, and how these shape UX.
• Interaction and UI design: You excel at interaction design and UI craft. You can set quality standards for modern, dense product surfaces and simplify complex workflows.
• System thinking and information architecture: You can design scalable interaction patterns (not just one-off features) and create clarity across complex journeys and permissions.
• Experimentation and iteration: You are comfortable working in iterative loops, using prototypes, dogfooding, and rapid testing to learn quickly, especially when “requirements” are unclear.
• User research and testing: You know how to de-risk AI experiences through research, including testing comprehension, trust, calibration, and workflows. You can combine qualitative and quantitative signals.
• Business thinking: You connect design decisions to customer and business outcomes. You can articulate success metrics and trade-offs clearly.
• End-to-end execution: You can take initiatives from concept to launch across multiple teams, breaking down complexity into shippable milestones.
• Storytelling and influence: You can align senior stakeholders, communicate the “why,” run workshops, and coach teams on better AI product thinking and craft.
• Technical collaboration: You collaborate deeply with engineers and data/ML partners, and understand technical constraints well enough to shape feasible solutions and guide implementation quality.
• AI tools: You actively use AI tools to enhance your workflow. You know how to prompt effectively, critique outputs, and build repeatable workflows while being thoughtful about safety and privacy.

Benefits

• Competitive compensation, including equity in the company;
• Generous vacation days so you can rest and recharge;
• Health perks such as private healthcare or gym allowance, depending on location;
• "Flexible compensation plan" to help you diversify and increase the net salary;
• Unforgettable Perk events, including occasional travel to one of our hubs;
• A mental health support tool for your well-being;
• Exponential growth opportunities;