About

About

I’m a Senior Product Designer using service design and product thinking to turn decision-heavy workflows into scalable patterns across markets, devices, and constraints.

I’m a Senior Product Designer using service design and product thinking to turn decision-heavy workflows into scalable patterns across markets, devices, and constraints.

a person wearing a baseball cap
a person wearing a baseball cap
a person wearing a baseball cap

Design with scale in mind and trust at heart

My core strength is framing ambiguity - applying product thinking to understand how people work under real constraints and translating that into service design mapping, interaction frameworks, and UI patterns that scale across devices, regions, and regulatory environments.

I work end to end, grounding decisions in behavioural research, shadowing, and user data, and defining workflow templates and design system foundations that design teams rely on to handle complex UX problems.

Across commerce and content platforms, I’ve led scalable system design at Amazon, SumUp, Spotify, and BBFC - from seller navigation and B2B2C ecosystems to global moderation, appeals, and compliance workflows.

I focus on building foundations that scale.

What I specialise in

What I specialise in

  • Behaviour-led design grounded in data - using shadowing, usability testing, and user data to design based on real user behaviour.

  • Service design and product thinking as foundation - mapping end-to-end workflows and turning ambiguity into clear, buildable product systems.

  • Designing multi-actor B2B and B2B2C platforms across commerce, content, and operations.

  • Designing systems where policy, UX, and operations intersect.

  • Translating ambiguous rules into consistent, scalable decisions.

  • Designing decision-heavy interaction flows for speed and accuracy.

  • Designing systems for global launches under regulatory constraints.

  • Designing recovery and escalation paths for decision systems where errors affect money, access, or enforcement.

  • Scalable UI and interaction patterns - designing patterns that work across countries, devices, and regulatory environments.

  • Systemisation at team scale - defining UX templates and design system standards teams rely on to handle complex problems consistently.

Experience

Experience

Amazon, Senior Product Designer, 2024 — Today

Own and lead UX for core seller-facing experiences, including a 0->1 order management capability supporting high-volume sellers at scale.

SumUp, Senior Product Designer, 2023 — 2024

Led interaction design for a B2B2C order and payment experience across the UK, EU, US, and Brazil, and supporting 1M+ transactions.

Amazon, Senior Product Designer, 2024

Own and lead UX for core seller-facing experiences, including a 0->1 order management capability supporting high-volume sellers at scale.

SumUp, Senior Product Designer, 2023 — 2024

Led interaction design for a B2B2C order and payment experience across the UK, EU, US, and Brazil, and supporting 1M+ transactions.

Spotify, Product Designer, 2021 — 2023

Led interaction design for Spotify’s global appeals platform, meeting EU DSA requirements and scaling content moderation workflows.

100 Shapes, Product Designer, 2019 — 2021

Redesigned BBFC’s classification workflow, cutting review time by 30% and supporting ITV and BBC with scalable content management systems.

My inspirations and interests

My inspirations and interests

Much of my inspiration comes from people and environments - how we interact, what shapes our behaviours, and the invisible processes behind the tools we use every day.

When I’m not designing, I explore the world through urban sketching and creating fictional characters. Gallery visits, and observing life through a sketchbook help me notice the small things that often lead to big ideas.

Looking ahead

Looking ahead

As I continue to grow as a designer, I’m increasingly focused on designing digital safety systems that protect people at scale — from content moderation to platform decision-making. I want to keep shaping tools that help people feel safe, respected, and in control of their experience.

I'm also thinking more about the role of AI. As these systems take on more responsibility, I believe it's important that we don’t lose sight of human judgement and care. I want to be part of designing tools that make AI feel accountable, not invisible, and that uphold the integrity of platforms we use every day.

Interested in connecting?

Let’s talk projects, collaborations, or anything design!

Interested in connecting?

Let’s talk projects, collaborations, or anything design!

Interested in connecting?

Let’s talk projects, collaborations, or anything design!

Tiffany Szu-Chia Chen

Copyright 2025 by Tiffany Szu-Chia Chen

Tiffany Szu-Chia Chen

Copyright 2025 by Tiffany Szu-Chia Chen

Tiffany Szu-Chia Chen

Copyright 2025 by Tiffany Szu-Chia Chen