Lead Product Designer (UI/UX)

Signal AI; City Of London; On-site; GBP 70,000 - 90,000; Full time

Job summary

A leading AI technology firm in the UK seeks a Principal Product Designer to create transformative B2B experiences. The role involves user insights, rapid prototyping, and leading design innovation in AI-powered systems. The ideal candidate will have extensive experience in product design, strong leadership skills, and a passion for user-centered design. They will work in an inclusive environment encouraging diverse backgrounds and perspectives.

Responsibilities

• Conduct research with Product Managers to validate user needs.
• Utilise AI/LLM tools for rapid prototyping.
• Plan usability testing based on data-driven insights.
• Design human-centric solutions for AI-powered systems.
• Develop adaptive interfaces that foster trust.
• Craft data visualisations to transform complex insights.
• Define a cohesive visual language aligned with brand identity.
• Own the long-term UX direction for product decisions.
• Mentor designers and foster a culture of learning.

Skills

Extensive Experience in product design

Lean/Agile Expertise

AI & Data Proficiency

Leadership & Mentorship

Technical Collaboration

Design Systems & Tools

Strategic Thinking

Excellent Communication

Tools

Prototyping tools (industry-standard, AI/LLM-assisted)

Job description

We're on a mission to change the way businesses make decisions with our cutting-edge AI technology. To achieve that, we’re looking for passionate people to join our open and unconventional workplace. Our inclusive environment welcomes skills and experiences from diverse backgrounds, and defines who we are.

Summary

Become our Principal Product Designer, transforming how enterprises harness AI to make informed decisions, mitigate critical risks, and build lasting trust. You’ll shape human‑centric B2B experiences through rapid iteration, bold UX vision, and a passion for game‑changing design.

Responsibilities

User Insights & Rapid Prototyping

• Conduct research with Product Managers to validate user needs and define problems.

• Utilise AI/LLM tools and traditional methods for rapid prototyping and refinement.

• Plan and run usability testing, applying data‑driven insights for continual improvement.

AI, Data-Driven & B2B Experiences

• Design human‑centric solutions for AI-powered systems, balancing automation with user control.

• Develop adaptive interfaces, conversational UIs, and explainable AI features that foster trust.

• Craft data visualisations that transform complex insights into clear, actionable information.

• Tailor robust workflows for enterprise/B2B scenarios, ensuring usability and efficiency.

Design Execution, Aesthetics & Accessibility

• Define and maintain a cohesive visual language aligned with brand identity.

• Evolve the design system with new components and interaction paradigms.

• Partner with Engineering to ensure designs meet usability, accessibility, and technical feasibility.

Strategy, Leadership & Innovation

• Own the long‑term UX direction to guide day‑to‑day product and design decisions, ensuring coherence and impact.

• Embrace lean and agile methodologies, shipping quickly and iterating based on real‑world feedback.

• Mentor designers, lead workshops and sprints, and foster a culture of continuous learning.

• Effectively manage multiple concurrent workstreams, prioritising initiatives and ensuring timely delivery.

Requirements

• Extensive Experience: well‑experienced in product design, UX/UI, or a related field, with a notable portfolio of B2B or enterprise products.

• Lean/Agile Expertise: Track record of rapidly delivering value and iterating based on user feedback.

• AI & Data Proficiency: Experience designing for AI-driven or data-intensive products, including data visualisation and complex workflows.

• Leadership & Mentorship: Proven ability to guide design teams, drive collaboration, and elevate design standards.

• Technical Collaboration: Adept at partnering with Engineers to ensure scalable and feasible solutions.

• Design Systems & Tools: Familiarity with evolving and maintaining design systems, plus proficiency in industry-standard (and AI/LLM-assisted) prototyping tools.

• Strategic Thinking: Skilled at aligning design work with business objectives and demonstrating measurable impact.

• Excellent Communication: Ability to clearly articulate design rationale, advocate for user-centered decisions, and influence stakeholders at all levels.

Not sure you meet every requirement? Studies show that women and other underrepresented groups often hesitate to apply unless they check every box. At Signal AI, diverse perspectives strengthen our teams, drive innovation, and lead to better performance. So even if your background doesn’t align perfectly with each qualification, we encourage you to apply if you’re passionate about this role.

We're dedicated to creating an inclusive environment where every Signaller feels welcomed, valued, and heard—a place where you can truly thrive as yourself.