Sean Loomis

Freelance Senior Product Designer @ DoorDash | Design Partner for Complex Products | Building Creative Networks

Hamburg, Hamburg, Germany

About

I help companies navigate the messy middle between a good idea and a great product. The hardest part of building products isn't design execution alone. It's the gap between "we should build this" and "here's what we're actually building." Where strategic vision meets user needs, technical constraints, and stakeholder politics. That's where I work. I lead strategic product design initiatives for companies working through complexity. From early-stage startups defining their MVP, to established business scaling global platforms. The work I do lives in the space between vision and execution. If you're stuck between what you want to build and how to get there, let's talk. ✌️ --- Beyond client projects, I founded the Hamburg Designers community to foster collaboration among creatives. Curating events for nearly 1,100 members, I cultivate spaces for inspiration and empowerment. My dedication extends to teaching, having mentored design students and professionals through courses that refine their skills and elevate their craft.

Experience

  • Senior Product Designer at DoorDash
    Jan 2026 - Present · 6 mos

  • Senior Product & UX Designer at Sean Loomis Design
    Jan 2010 - Present · 16 yrs 6 mos

    · Digital Product Design · User Experience Design · Information Architecture · User Research · Interface Design · Design Systems · Design Operations & Business Design Consulting

  • Founder at Hamburg Designers
    Oct 2019 - Present · 6 yrs 9 mos

    The Hamburg Designers community is an initiative I founded in 2019, to create a space where Designers in Hamburg, Germany could go to connect, get empowered, and be inspired. We've now grown to a community of 1200+ designers across the city in various disciplines. I also curate bi-monthly events for the Hamburg Design Community. 🥳 🥂

  • Co-Founder & Creative Director at Creative Cities Connect
    Jul 2025 - Present · 1 yr

  • Senior Product Designer / Concept Lead at Siemens Healthineers
    Oct 2022 - Dec 2025 · 3 yrs 3 mos

    Designed clinical software across cardiology, radiology, and AI diagnostics. Led product design for structural heart disease treatment tools (SINUS), next-generation radiology platforms (Syngo Carbon Space), and commercial AI-powered diagnostic solutions (Radiology as a Service). ✦ Defined product-wide standards for communicating AI indicators and LLM insights to clinicians across multiple touchpoints ✦ Led design efforts that reduced time to diagnosis for lung nodules through intuitive workflow optimisation ✦ Improving image fusion workflows and interfaces aligning multiple modalities for improved cathlab efficiency ✦ Built internal design culture through knowledge bases, cross-team share-out sessions and workshops ✦ Launched first internal AI Prompt Battle to drive experimentation culture