Principal Product Designer
Microsoft
Product, Design
London, UK
Posted on Mar 4, 2026
Overview
Responsibilities
Qualifications
The M365 Core Design Studio is a global, multidisciplinary team designing human-centered AI experiences across Microsoft 365, including M365 Copilot, Agent experiences, Windows companions, People experiences, and Enterprise Search. We’re looking for a Principal Product Designer (IC) who thrives in the new era of designing for AI. This role isn’t just about designing interfaces—it’s about shaping how AI behaves, responds, and integrates into people’s lives through high-quality multi-turn interactions, system behavior, and end-to-end experiences.
Microsoft’s mission is to empower every person and every organization on the planet to achieve more. As employees we come together with a growth mindset, innovate to empower others, and collaborate to realize our shared goals. Each day we build on our values of respect, integrity, and accountability to create a culture of inclusion where everyone can thrive at work and beyond.
Responsibilities
- Lead end-to-end design for AI-powered experiences across platforms and form factors, partnering closely with Product and Engineering.
- Lead with curiosity: explore emerging AI tools and techniques by default (prompting, rapid prototyping, creative experimentation) and bring learnings back to the team.
- Design like a maker: build prototypes, test ideas, and iterate quickly to uncover what’s possible (including hands-on work with prompts, model behavior, and system constraints).
- Define AI experience quality expectations and frameworks for complex, multi-turn scenarios (e.g., context handling, uncertainty, graceful fallbacks), and influence decisions through strong storytelling
Qualifications
Required Qualifications:
- Master's Degree in Industrial Design, Product Design, Human Computer Interaction, User Experience, Interaction Design, or related field AND 6+ years experience working in product or service design
- OR Bachelor's Degree in Industrial Design, Product Design, Human Computer Interaction, User Experience, Interaction Design, or related field AND 8+ years experience working in product or service design
- OR equivalent experience (e.g., demonstrated experience working in product or service design or using design thinking to solve problems).
- Excellent communication and storytelling skills, including the ability to influence cross-functional partners and stakeholders.
- Experience shipping products or services through an end-to-end design process.
- Strong interaction design, systems thinking, and scenario design skills (including multi-turn and AI-assisted experiences).
- Ability to translate complex problems into clear UX frameworks, flows, and UI specifications.
- Experience creating information architecture, wireframes, and prototypes; comfort iterating quickly to test and validate behavior (not just UI).
- AI-forward mindset: fluency with prompting and context building; working knowledge of RAG systems and agent patterns; ability to evaluate AI system behavior and define quality for multi-turn scenarios.
- Ability to manage time, prioritize effectively, and deliver under deadlines.
- Portfolio demonstrating end-to-end product design work is required.
Preferred Qualifications:
- Proven experience designing AI/LLM-powered experiences, including shaping model/agent behavior beyond UI (prompting, context engineering, RAG).
- Experience with agents, tool integration and orchestration, and/or evaluation frameworks (quality rubrics, red teaming, conversation review) is a strong plus.
- Proficiency in Figma and AI prototyping tools; experience with vibe coding or similar creative prototyping approaches is a plus.
- Experience designing for ambiguity in AI systems (uncertainty handling, partial answers, grounding, and graceful fallbacks).
- Strong builder mindset and comfort operating in fast-moving, evolving AI product spaces.
- Portfolio includes AI behavior work (model shaping exercises, prompt/context design), and prototypes that demonstrate orchestration, tool use, or agent behavior beyond UI.
#M365
This position will be open for a minimum of 5 days, with applications accepted on an ongoing basis until the position is filled.
Microsoft is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to age, ancestry, citizenship, color, family or medical care leave, gender identity or expression, genetic information, immigration status, marital status, medical condition, national origin, physical or mental disability, political affiliation, protected veteran or military status, race, ethnicity, religion, sex (including pregnancy), sexual orientation, or any other characteristic protected by applicable local laws, regulations and ordinances. If you need assistance with religious accommodations and/or a reasonable accommodation due to a disability during the application process, read more about requesting accommodations.