Product Designer, Ho Chi Minh City
About me.
I’m Trinh Ngoc Hieu, known as Hillx. I design products with heavy business logic, and the design systems that keep them consistent as they grow.
Currently
Open to conversations about product design work.
Based in Ho Chi Minh City, working with teams anywhere.
About
I start every project by understanding the people using it, their habits, their frustrations, and what they’re actually trying to get done. That’s usually where the real problem lives, not in the interface itself. My technical background keeps me close to how things get built, so what I design holds up in implementation instead of falling apart at handoff. I don’t chase polish for its own sake. I care about whether a design changes behavior in a way that matters, for the user and for the business. That’s the standard I hold my own work to, and the one I bring when working with a team.
Experience
Feb 2025 to May 2026 · AI PropTech · Multi-sided platform
I owned end-to-end design for Druce across four connected surfaces: an agent app, a customer app, a merchant app and an internal portal. The work brought complex property, transaction and compliance workflows into usable experiences across mobile and web.
I also helped define greenfield AI products, built two token-based design systems, and set the design and handoff standards for the team.
Jan 2023 to Jan 2025 · E-commerce · Commercial Design
I redesigned Seller Center Next-Gen and shipped work across 10+ commercial tools, including order management, pricing and supply planning. I also architected SPHERE, the token-based design system behind TIKI’s commercial products.
New experience flows reached 90%+ user satisfaction. The Pricing Tool work cut pricing-adjustment notifications by about 97%, and the Supply Planning 2.0 redesign contributed to 41% growth in Level-0 SKU contribution.
Jan 2023 to Nov 2023 · Startup · Omni-channel platform
I designed GenViet OMS, an order management system that ties e-commerce, store operations, inventory and customer management together, and a mobile app for store staff during active shifts.
Across the core platform and partner projects, I evolved the Asgard design system so products could be re-skinned without drifting apart.
Dec 2021 to Jan 2023 · E-commerce · Omni-channel retail
As a founding member of the Product Design team, I helped grow it from one to four designers and worked across 8+ consumer, retail-operations and enterprise products. I also built Asgard, HPI’s first token-based design system.
The redesigned in-store Click app cut fulfillment processing workload by about 30%, and the loyalty app reached more than 1,000 daily active users.
Dec 2020 to Nov 2021 · Product studio · Mobile app design
Executed end-to-end mobile design across three distinct consumer categories in a fast-paced studio environment.
Aug 2019 to Apr 2020 · Enterprise software
Modeled client requirements in UML, authored user stories, and delivered UX/UI specs for enterprise software, bridging business analysis with product design to translate complex logic into functional interfaces.
Full version
This is the short version of my experience. The full one covers every role in detail, and its PDF lists three references. If you have my CV, the portfolio link in it opens the full version. Otherwise, email me and I’ll be happy to send access.
Freelance & consulting
Years
Client
Dec 2023 to Jan 2025
DMK (Deutschmitkobe) · EdTech, AI-powered language platform
2022 to 2023
Hecigo · FinTech, B2B
2022 to present
Brand & e-commerce engagements
Core capabilities
Five areas I bring to a product team.
Product & UX Strategy
0-to-1 product strategy, complex domain UX (PropTech, FinTech, e-commerce), information architecture, multi-surface user journeys, data-driven research.
Design Systems & Architecture
Design system architecture, token-based hierarchy, white-label and multi-tenant systems, headless component libraries, cross-platform consistency.
AI & Emerging Tech
Agentic and copilot UX, generative AI workflows, human-in-the-loop interaction patterns, spatial and conversational AI, predictive matching UX.
Craft Leadership & Operations
DesignOps and handoff governance, design practice ownership, craft mentorship and onboarding, stakeholder alignment, Agile and Scrum.
Business & Technical Fluency
Business analysis (UML and requirements), enterprise logic (ERP, CRM, OMS), front-end alignment (React, HTML, CSS), process digitization.
Tools
Figma · FigJam · Stitch · Perplexity · Gemini · ChatGPT · Claude · GA · Hotjar · CrazyEgg · SimilarWeb
Education
B.Eng., Computer Science, Natural Language Processing specialization. University of Information Technology (UIT), Vietnam National University, Ho Chi Minh City.
Beyond work
Executive Committee, Youth Union, Computer Science Faculty, UIT VNU-HCM (2016 to 2020). Organized cross-university events and music programming.
How I work
Four habits I bring to every project.
Start with the people
Research and real workflows come before screens.
Design that survives the build
Specs, tokens and edge cases ship with the design, so it holds up in development.
Systems over one-off screens
Four design systems so far: Asgard, SPHERE, Astræus and Druce Snowflake.
Judged by behavior
Fewer alerts, less manual work, more people coming back.
What colleagues say
“I highly recommend Hiếu as a product designer with a logical, results-oriented approach. … Hiếu also made a strong impact in building the system design for Tiki’s Commercial system, enhancing our product development process, especially on UI/UX.”
“I’ve had the pleasure of working closely with Hieu, an exceptional product designer with a sharp product mindset and a refined, modern taste in UI design. … He has a remarkable talent for balancing aesthetics with functionality, which has consistently elevated our product.”
“What impressed me most goes beyond his deep expertise and excellent teamwork: it’s his mindset of bridging Design and Technology. … Strong Product Designers aren’t rare. But a designer who applies advanced technical skills and technology to building great user experiences is genuinely hard to find.”
Where I’ve worked
2025 to 2026
DX FutureTech
Product Designer
AI PropTech
2023 to 2025
TIKI
Product Designer
E-commerce
2023
ScaleUP Technologies
Product Designer
Omni-channel platform
2021 to 2023
Hoang Phuc International
UX/UI Designer
Omni-channel retail
2020 to 2021
VDE Technology
UX/UI Designer
Product studio
2019 to 2020
WinERP
Business Analyst & UX/UI Designer
Enterprise software
2023 to 2025
DMK
Product designer, freelance
EdTech, AI
2022 to 2023
Hecigo
Product designer, freelance
FinTech, B2B
2022 to present
The Nexova
Brand and e-commerce work
Freelance