Senior Product Designer

Methodfi; Greater London; On-site; GBP 65,000 - 85,000; Full time

Job summary

A cutting-edge technology firm in Greater London seeks a Senior Product Designer to lead the design of an AI platform for life sciences. This role requires 5-8 years of product design experience, a strong portfolio, and the ability to handle user research and prototyping. You will collaborate closely with cross-functional teams to shape product strategy and execution. The company offers a competitive compensation package, including private medical and dental insurance, and a supportive environment for personal development and wellbeing.

Benefits

Competitive compensation package

Private medical insurance

Private dental insurance

Life insurance

Personal development budget

Individual wellbeing budget

25 days holiday plus bank holidays

Your birthday off

Qualifications

• 5 – 8 years experience in product design (UX/UI), ideally in SaaS, AI or technical products.
• Strong portfolio demonstrating product thinking, craft and impact.
• Experience or strong interest in designing AI-powered or data-rich products.

Responsibilities

• Lead end-to-end design from discovery through to delivery.
• Define how users interact with complex, intelligent systems.
• Conduct user research and usability testing to inform decisions.

Skills

Product design

User research

Prototyping

AI systems design

Cross-functional collaboration

Tools

Figma

Claude Code

Cursor

Job description

The Role

We’re looking for a Senior Product Designer to join our small but impactful Product Design team to own and shape the experience of our AI platform for life sciences. This is a senior IC role embedded within a cross-functional team, focused on agentic research workflows and AI-driven user experiences for our customers.

You’ll lead end-to-end design from discovery through to delivery, defining how users interact with complex, intelligent, evidence-backed systems in intuitive, trustworthy and high-impact ways. This is not a traditional product design role. You will be designing systems, workflows, and behaviours — shaping how humans collaborate with AI in scientific and expert domains.

What you'll be doing

Product and experience design

• Own the end-to-end design of product experiences from discovery to delivery
• Design AI-native workflows and agent-driven experiences, translating complex capabilities into intuitive interactions
• Define system behaviours, states and flows — not just screens
• Prototype rapidly across different fidelity levels using AI and coding agents to explore and validate ideas

Discovery and problem definition

• Lead product discovery, framing problems and identifying high-impact opportunities
• Conduct user research and usability testing to inform decisions
• Synthesise insights into clear product and design direction

AI interaction and systems design

• Design interaction models for human–AI collaboration, ensuring clarity, control and trust
• Work with non-deterministic systems, shaping experiences that account for uncertainty and variability in AI outputs
• Contribute to defining new patterns for agentic and generative interfaces

Prototyping and implementation

• Prototype ideas using modern AI tools and code (e.g. Cursor, Claude Code) to explore and validate concepts quickly
• Create interactive, production-adjacent prototypes beyond static design tools
• Contribute lightweight code changes and PRs where it accelerates learning and delivery
• Partner closely with engineers to ensure high-quality implementation

Cross-functional collaboration and ownership

• Partner closely in a trio model with Product Managers and Engineers to shape product strategy and roadmap
• Translate business goals into product direction, user experience, and execution
• Drive projects forward in ambiguous environments with a high degree of ownership

Systems and craft

• Design scalable systems, patterns and components
• Contribute to and evolve our Causaly design system
• Maintain a high bar for interaction, visual design and overall product quality

Leadership and influence

• Act as a design leader within your team, raising the bar for quality and clarity
• Communicate ideas effectively to stakeholders across product, engineering and leadership
• Contribute to design culture, critique and continuous improvement
• Take ownership of your domain and decisions backed by user feedback, analytics and business rationale

What we’re looking for

Core experience

• 5 – 8 years experience in product design (UX/UI), ideally in SaaS, AI or technical products
• Proven track record of designing and shipping complex products or workflows end-to-end
• Strong portfolio demonstrating product thinking, craft and impact

AI and systems thinking

• Experience or strong interest in designing AI-powered or data-rich products
• Ability to think in systems — designing flows, behaviours, patterns and interactions
• Comfortable working with ambiguity and shaping new UX paradigms

Prototyping and builder mindset

• Comfortable prototyping with code or AI-assisted tools (e.g. Cursor, Claude Code, or similar)
• Ability to move fluidly between design and implementation
• Experience contributing to production codebases (e.g. small PRs, functional prototypes) is a plus
• You’re comfortable building product yourself – taking ownership and doing what it takes to bring ideas to life

Strong design craft

• Strong interaction and visual design skills
• High proficiency with modern design tools (our key tool stack includes figma, Claude Code, Cursor, Miro and prototyping tools, etc.)
• Experience building and maintaining design systems
• Experience working in cross-functional product teams
• Strong communication and storytelling skills

What we’d like to see

• Experience with generative AI, agent-based systems or conversational interfaces
• Background in healthcare, life sciences or other complex domains
• Experience in fast-paced start-up environments
• Experience designing for trust, transparency and judgement in AI systems

Benefits UK

💰 Competitive compensation package

🩺 Private medical insurance

🦷 Private dental insurance

📔 Life insurance (4 x salary)

🤓 Personal development budget

🧘 Individual wellbeing budget

🌴 25 days holiday plus bank holidays

🥳 Your birthday off!

🚀 Potential to have real impact and accelerated career growth as a member of an international team that's building a transformative AI product.

We are on a mission to accelerate scientific breakthroughs for ALL humankind, and we are proud to be an equal opportunity employer. We welcome applications from all backgrounds and fairly consider qualified candidates without regard to race, ethnic or national origin, gender, gender identity or expression, sexual orientation, disability, neurodiversity, genetics, age, religion or belief, marital/civil partnership status, domestic / family status, veteran status or any other difference.