Product Designer — Singapore

Designing calm,human interfaces forfast-moving products.

I'm Mack Seah — a product designer. I work from research to pixel, exploring widely and moving fast from rough idea to high-fidelity interface, building systems that feel quiet, clear, and considered.

Selected Work ↓ Get in touch
© 2026 — Mack Seah Singapore · 1.3521° N
02 — Selected Work

Recent projects

01 — About

Designer of quiet,
dependable systems.

Mack Seah is a product designer based in Singapore, working across consumer apps, tools, and the systems behind them — the kind of software people lean on without thinking about it.

Over the past several years I've shaped products from early concept to shipped interface, designing flows people reach for every day. My work lives at the meeting point of clear systems thinking and unhurried, human craft — explored widely, then refined fast.

I care about the details that don't announce themselves: a form that just works, copy that calms, motion that reassures. Good design should feel effortless — and that effort is the work.

Work with me ↗ Resume ↗
Mack Seah Mack Seah · SGP
02 — Experience

Selected roles

Product Designer2023 — Now
Trinax · HPB Healthy 365
Interaction Designer2020
Accenture · Enterprise UX · Internship
03 — Capabilities

What I do

Product Design01
UX & Interaction02
Design Systems03
User Research04
Prototyping05
Service Design06
AI-Assisted Design07
Vibe Coding08
02 — Resume

Mack Seah

linkedin.com/in/seahtianzi
01

Experience

Product DesignerDec 2023 — Present
Trinax · Singapore
  • Lead end-to-end product design for HPB's Healthy 365 — Singapore's national health app used by over a million people.
  • Reshaped core journeys across step tracking, rewards, and challenges, lifting engagement and everyday retention.
  • Designed phygital and experiential interfaces for exhibitions, museums, and branded retail spaces.
  • Built reusable components and patterns, pairing closely with engineers to ship accessible, pixel-perfect interfaces.
Interaction DesignerJun 2020 — Sep 2020
Accenture · Singapore · Internship
  • Supported enterprise UI/UX projects with a human-centered, research-led approach.
  • Ran rapid prototyping and helped craft stakeholder presentations that moved decisions forward.
  • Worked across disciplines to deliver end-to-end digital solutions tailored to client needs.