Principal Product (UI) Designer

JR United Kingdom; London; Hybrid; GBP 80,000 - 100,000; Full time

Job summary

An ambitious biotech and AI company is seeking a Principal Product Designer to shape their innovative product. This role offers the chance to define a new product from the ground up, working closely with a small team to create impactful designs. You'll collaborate with product and engineering teams, ensuring clarity and purpose in highly technical tools. This is a unique opportunity to influence product direction in a mission-driven company with a long-term vision. If you're ready to make a significant impact in a dynamic environment, this role is for you.

Qualifications

• Strong visual/UI portfolio with clean, modern design.
• Experience with B2B, data vis, or complex product interfaces.

Responsibilities

• Own the visual design across product and brand.
• Build and scale a consistent design system.

Skills

UI Design

Visual Design

Collaboration

B2B Experience

Data Visualization

Product Design

Startup Experience

Job description

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? Job Title: Principal Product (UI) Designer

? Location: Central London - Hybrid, 2 days/week in office

? Salary: Up to £100,000(DOE + Benefits)

? Reporting To: Head of Design (UX)

We’re partnering with an ambitious biotech x AI company that’s heading into an exciting new phase—and they’re looking for a UI leaning, Principal Product Designer to help shape the next chapter of their product. ??

Currently a lean team of 16, backed by powerful in-house tech, they’re pivoting toward a fresh, high-impact direction (under NDA for now) that’s set to redefine how AI and biotech come together.

You’ll be one of just two designers, working closely with product and engineering to bring highly technical tools to life with clarity, polish, and purpose.

• ? Own the visual design across product and brand
• ? Build and scale a consistent design system
• ? Collaborate with product, engineering, and senior leadership

? What They’re Looking For

• 0–1 product and startup experience
• ? Strong visual/UI portfolio with clean, modern design
• ? Experience with B2B, data vis, or complex product interfaces
• ? Comfortable owning design in a small team (just 2 total)
• ? Bonus if you’ve worked in biotech, ML, or data-heavy environments

? Why You’ll Love It

• ?️ Help define a new product from the ground up
• ? Work directly with leadership and have a real voice
• ? Join a mission-driven company with long-term vision and funding

If the above reflects your skill set and what you’re looking for, please apply!