Tamsin Gatzanis
About

People first, always

I'm a product designer with six years spent making complicated, high-stakes software feel simple to use. I'm currently a Product Design Manager at Pfizer, leading enterprise and user-facing work — and I bring an AI-accelerated process to all of it.

I'm drawn to the psychology behind how people make decisions and interact with systems — and I design with that at the center, building solutions that work with human behavior, not against it.

I got into product design because I like figuring out why something feels harder to use than it should be — the workarounds people build, the extra steps they shouldn't need. Making that complexity disappear for the person actually using the thing is what I care about most.

I like problems with real constraints — regulation, legacy systems, high stakes — because that's where good design actually matters. I lead projects end-to-end: translating business requirements into a clear direction, partnering with engineering on what's feasible and how it ships, and staying close to users so what we build actually solves the problem we started with.

AI hasn't changed my process, just sped it up. I use it to synthesise research, pressure-test copy, and build real, working front-end prototypes — not just clickable mockups — so people can react to something functional before committing real design or dev time to a direction. It doesn't replace judgment — it just means I can test more ideas before picking one.

What I bring

Design
  • UX research
  • Interaction design
  • Design systems
  • Accessibility
  • Prototyping
Leadership & collaboration
  • Leading projects end-to-end
  • Translating business requirements into design direction
  • Partnering with engineering on feasibility & handoff
  • Ongoing user validation
Domain strengths
  • Regulatory / compliance-aware design
  • Design systems at scale
  • Highly constrained, complex environments
  • Range: internal enterprise tools research-led user-facing product
Toolkit Claude Claude Design Figma Figma Make Cursor VS Code Miro
The other practice

Away from the screen, I paint

Mostly still life and figurative work — an ongoing study of texture, weight, and light. It's slower than design, and answers to a different set of instincts.

The Weight of Relief — acrylic figurative painting
The Weight of Relief
David In Marmor — acrylic figurative painting
David In Marmor
A Seat at the Table — acrylic still life painting
A Seat at the Table
Simple Pleasures — acrylic still life painting
Simple Pleasures
More paintings on Behance
Contact

Let's connect

Open to senior and lead product design roles. If you're building something with real constraints, I'd love to hear about it.