Case study 01 · K-beauty e-commerce

Healthy Skin, Happier You

Korean skincare for a calmer, brighter everyday.

RoleUser research, UI design
Timeline2 months, part-time
PlatformDesktop and mobile
MethodDouble Diamond
01 · The project

Arumi

Arumi is an online store specializing in Korean skincare products. The business aims to sell products directly to customers across desktop and mobile.

Its main focus is providing authentic products, a simple shopping experience, and personalized recommendations based on each user’s skin type. Arumi operates within the beauty and skincare industry, offering Korean skincare products such as serums, toners, moisturizers, sunscreens, and face masks. Its primary revenue comes from direct product sales.

View prototype ↗

ARUMI · Homepage prototypeOpen in Figma ↗
The full redesigned ARUMI homepage, scrolling from the hero to the footer

The ARUMI homepage prototype, scrolling top to bottom

02 · Role

My part

I worked part-time on this project for two months. I collaborated with my teams throughout the project while contributing to user research and UI design.

Stakeholder

What the business asked for

We asked the design team to create a complete information architecture for our business so users can clearly understand what we offer and how our services work. The experience should include services such as a skincare quiz, personalized product recommendations, product comparison, online checkout, order history, and return requests. However, the user flows should focus on the specific desktop and mobile tasks we provided. If the team needs clarification about the business, service scope, or priorities, they should ask us before making assumptions.

Skincare quizPersonalized recommendationsProduct comparisonOnline checkoutOrder historyReturn requests
Process

From discovery to delivery

I used the Double Diamond framework to guide the project from discovery to delivery. I explored the skincare e-commerce landscape through competitive analysis, defined the scope based on the stakeholder brief and selected user tasks, developed the information architecture and design concepts, and delivered the final experience for the specified desktop and mobile journeys.

03 · Double Diamond

Double Diamond

I used the Double Diamond framework to guide my project from exploring the skincare e-commerce landscape to delivering a focused desktop and mobile experience.

Phase 1

Discover

I conducted a competitive analysis of five skincare e-commerce websites, comparing their navigation, product information, personalization, trust signals, calls to action, and overall user experience. This helped me identify common patterns and opportunities to improve product discovery.

Phase 2

Define

I reviewed the stakeholder brief to clarify the business services, project scope, and assigned desktop and mobile tasks. This helped me determine what the website needed to communicate and which user journeys to focus on.

Phase 3

Develop

I created the information architecture and mapped the specified desktop and mobile user flows. These helped organize the business’s services and define clear paths for users to complete the selected tasks.

Phase 4

Deliver

I translated the information architecture and user flows into the final desktop and mobile designs, supporting the selected journeys for product discovery, comparison, checkout, order history, and returns.

04 · Research

Research

I conducted a competitive analysis of five skincare e-commerce websites to understand how they support product discovery and purchasing. I compared their navigation and search, product information, personalization, trust signals, calls to action, and overall user experience. By identifying each website’s strengths and limitations, I found patterns and opportunities that helped guide the design direction for Arumi.

05 · Competitive analysis

Competitive analysis

A comparison of five skincare e-commerce platforms

Discover / Research
WebsiteNavigation & searchProduct informationPersonalizationTrust signals & CTAOverall UX
YesStyle01Filters by skin type, brand & ingredientsDetailed descriptions, ingredients & reviewsProduct and routine suggestionsMany reviews, ratings & customer photos; clear Add to Bag / Quick BuyFeature-rich, but pages can feel crowded
Soko Glam02Simple navigation by skin concernScientific, educational product detailsRoutine guidance and skincare tipsEducational content; clear, minimal CTAsSimple, professional experience
StyleKorean03Simple, brand-based navigationModerate product descriptionsLimited personalizationCustomer reviews; standard CTAUsable, with a less modern interface
Jolse04Simple categories; limited searchBasic product informationNo personalizationLimited reviews; simple CTARelatively dated experience
Peach & Lily05Clear, intuitive navigationDetailed scientific descriptionsSkin quiz and routine builderBrand credibility and expert recommendations; clear, minimal CTADistinctive, premium experience
Key insights

Opportunities for ARUMI

01
Make discovery intuitive

Use clear categories and skin concerns.

02
Build product confidence

Pair product details with visible reviews and trust cues.

03
Personalize the journey

Link quiz results to relevant products and routines.

06 · Affinity Map

Affinity Map

The competitive analysis revealed an opportunity for Arumi to make skincare product discovery and selection more guided and confidence-building by combining skin-focused navigation, clear product information, personalized recommendations, and visible trust signals.

Affinity map

Competitive analysis findings grouped into recurring themes

5 skincare websites
Observations clustered by theme

01Product discovery

YesStyleFilters by skin type, brand and ingredients
Soko GlamNavigation organized by skin concern
StyleKoreanBrand-based navigation
JolseSimple categories; limited search
Peach & LilyClear, simple navigation

02Product information

YesStyleDetailed descriptions, ingredients and reviews
Soko GlamScientific details and educational content
StyleKoreanModerate product descriptions
JolseBasic product information
Peach & LilyDetailed scientific descriptions

03Personalization

YesStyleProduct and routine suggestions
Soko GlamRoutine guidance and skincare tips
StyleKoreanLimited personalization
JolseNo personalization
Peach & LilySkin quiz and routine builder

04Trust & credibility

YesStyleReviews, ratings and customer photos
Soko GlamEducational content builds credibility
StyleKoreanCustomer reviews
JolseLimited reviews
Peach & LilyBrand credibility and expert recommendations

05Shopping experience

YesStyleClear Add to Bag / Quick Buy; pages can feel crowded
Soko GlamClear, minimal CTA; simple, professional UX
StyleKoreanStandard CTA; usable, less modern interface
JolseSimple CTA; relatively dated experience
Peach & LilyClear, minimal CTA; distinctive, premium UX
→
Synthesis for Arumi

Combine clear skin-focused discovery with useful product education, quiz-led routines, visible trust signals, and focused calls to action—without crowding the experience.

Design areas

Five areas to guide the design

Based on the stakeholder brief and my competitive analysis, I identified five areas to guide the design of Arumi:

1

Product Discovery

Make it easy for customers to find products by skin type, skin concern, or category.

2

Personalized Recommendations

Use a skincare quiz to recommend products based on each customer’s needs.

3

Product Evaluation

Present clear product details and make it easy to compare products.

4

Purchase Confidence

Build trust with clear product information, customer reviews, and a straightforward checkout process.

5

Post-Purchase Support

Make order history and product return requests easy to access and manage.

07 · Insights

How the Competitive Analysis Informed Arumi

Overall, the analysis helped me identify useful patterns and opportunities across competitor websites. I used these findings to guide Arumi’s product discovery, product information, personalization, trust-building, and shopping experience.

YesStyle

Its filters, detailed product information, and customer reviews showed me how useful it can be to support product discovery and help customers evaluate products. Its feature-rich interface also reminded me to keep Arumi’s experience clear and easy to navigate.

Soko Glam

Its skin-concern-based navigation and educational content inspired me to consider ways Arumi could help customers find relevant products and understand their skincare choices.

StyleKorean

Its brand-based navigation and customer reviews highlighted the value of making brand discovery straightforward and including customer feedback on product pages.

Jolse

Its basic product information and limited personalization helped me identify opportunities for Arumi to provide more helpful product details and more tailored recommendations.

Peach & Lily

Its skincare quiz, routine builder, and expert recommendations showed how personalization and credible guidance could support customers as they choose products.

08 · Persona

Who we are designing for

Portrait of the fictional persona Maya Brooks

Maya Brooks

The Busy Skincare Shopper
Profile Personal banker Discovery channels
InstagramTikTok

Often encounters Korean skincare through influencers and beauty creators.

A time-conscious shopper exploring Korean skincare

Primary goalAchieve healthier, glowing skin.Goal
Shopping behaviourPrefers online shopping because of her busy schedule.

Influencer content often introduces her to products.

Design considerations to explore

Potential directions based on this persona profile

01
Make product discovery quick

Help shoppers browse by skin type, concern, or product category.

02
Support confident evaluation

Present clear product details and useful trust signals.

03
Make recommendations feel relevant

Explore a skincare quiz that can guide shoppers toward suitable products.

Name and portrait are fictional; design considerations are hypotheses, not validated user findings.

09 · Ideate

User flow

This user flow maps the key steps and decision points across product discovery, personalized recommendations, product comparison, checkout, and post-purchase support, showing how research insights informed Arumi’s design.

ARUMI branched desktop user flow with five research themes mapped to design responses, plus the mobile return path
Research → branched user flow → design response
10 · Sketches

Sketches

I began with low-fidelity sketches to map the homepage and key shopping sections. In the first prototype, I noticed that navigation and product discovery could be clearer, so I refined the next iteration to make the skincare quiz, product information, and shopping paths easier to find.

Before (v1) and after (v5 redesign) · scroll to flip through

01 · Home

Three stacked header bands became one slim bar and a nav organised by skin type, concerns, brands and sets, with the quiz as the hero.

ARUMI Home: before (v1) and after (v5 redesign) with annotations
02 · Shop All

No title or filters became a page with filter chips, a regimen guide and seven sections in routine order, cleanse to protect.

ARUMI Shop All: before (v1) and after (v5 redesign) with annotations
03 · New Arrivals → New & Featured

A single "New" label became a launch banner, a 4-column "New this week" grid and featured edits tied to skin goals.

ARUMI New Arrivals → New & Featured: before (v1) and after (v5 redesign) with annotations
04 · Quiz intro

A grey one-liner and a sage button that failed contrast (2.45:1) became "Five questions. One routine that fits." with a dark CTA and no account wall.

ARUMI Quiz intro: before (v1) and after (v5 redesign) with annotations
05 · Quiz question

Checkboxes that implied multi-select became single-select photo cards, a progress rail and a "Why we ask" note.

ARUMI Quiz question: before (v1) and after (v5 redesign) with annotations
06 · Quiz result

Three equal products per step and twelve "Add to bag" buttons became four matched options per step, a compare table and one "Add routine to bag".

ARUMI Quiz result: before (v1) and after (v5 redesign) with annotations
11 · Final design · Redesign v5

The quiz, start to result

In v5 the quiz became a five-step regimen builder: climate, skin type, concerns, budget and routine length. It ends in a skin profile with four matched options per step and one button to add the whole routine to the bag.

Quiz intro: Five questions. One routine that fits.
Quiz introDesktop
Step 1 of 5: Where do you live? with climate photo cards
Step 1 of 5 · ClimateDesktop
Result: Hydration Seeker profile with four matched cleansers
Result · Hydration SeekerDesktop
12 · UI Kit v5

One green tone, every fill a variable

The v5 kit is a light-green monotone. Primitives live in Green/*, semantic aliases in v5/*, and every fill in the kit is bound to a variable. Each component is lifted from the live v5 screens, so the kit and the pages match one to one.

Foundations · Colour
Green/ink#2E3324 · text/primary
Green/ink-2#5B6450 · text/secondary
Green/muted#8B957C · text/muted
Green/line#D5DEC6 · border/default
Green/tint#EEF3E6 · surface/tint
Green/tint-2#F3F8E9 · surface/tint-2
Green/deep#3F4A32 · action/primary
Green/brand#5F6B4D · accent/brand
Green/lime#C5D89D · accent/lime
Green/sale#B3474E · status/sale
Green/white#FFFFFF · surface/page
Foundations · Type · Nunito Sans

Skincare matched to your skin, not the trend.

Skincare matched to your skin, not the trend.

Skincare matched to your skin, not the trend.

Skincare matched to your skin, not the trend

14 text styles, from Display 44 Bold to Eyebrow 11 SemiBold. Nunito Sans stands in for Avenir Next in production; Playfair Display is used only for the ARUMI wordmark.

Components · v5 · lifted from the live screens, so kit and pages match one to one
Global · utility bar / main nav
‹Free samples on orders $60+·Free shipping across Canada over $75›
For YouBestsellersNew & FeaturedSkincareSkin ConcernsBrandsSets & CollectionsThe Journal✦ Skin Quiz
Buttons
Start the quiz →Add To Cartor shop bestsellers
Chips
CombinationFour seasonsRedness$60 – $100
Badges
BestsellerNewSave 10%98% match · Best for you
Option tile
Humid & hotSticky summers, lightweight layersFour seasonsHumid summer, dry winter
Product card
BestsellerMatcha PDRN Pack CleanserMatcha PDRN Pack Cleanser★★★★★ 4.8 (1,042)Pore Care, Soothes$25.99 CAD120mlAdd To Cart
BestsellerHeartleaf 77% Soothing TonerHeartleaf 77% Soothing Toner★★★★★ 4.6 (2,310)Calms Redness, Hydrates$29.99 CAD250mlAdd To Cart
13 · Mobile app · Returns

A return in four steps

The brief asked for order history and return requests on mobile. The app takes Mina from her account to a started return with a QR code, with the refund shown before she confirms.

01 / 08

App home: Your routine, matched in 2 minutes
Home
Account with skin profile and Orders & returns
Account
Orders & returns list with return window
Orders
Step 1 of 4: Which items are you returning?
Step 1 · Items
Step 2 of 4: Why are you returning?
Step 2 · Reason
Step 3 of 4: How would you like to return?
Step 3 · Method
Step 4 of 4: Review your return
Step 4 · Review
Return started with QR code
Return started
14 · Validate

Validate

6–7 / 7 Participants completing each task after the changes

To validate the refined design, I repeated the usability test using the same tasks and questions as the first round. Task completion improved across all five tasks, increasing from 2–3 participants before the changes to 6–7 participants afterward, out of seven.

7
3.5
2–3
6–7
Round 1After redesign
15 · Conclusion

Conclusion

Overall, Arumi’s redesign created a more guided and personalized skincare shopping experience, helping users find suitable products, understand routine steps, and make informed choices.

In the second usability test, 6–7 out of 7 participants completed each task, compared with 2–3 out of 7 in the first round. This project taught me how to turn research insights into focused design decisions and use repeated testing to see whether those changes actually help users.

Given the limited project timeline, I prioritized the core product-discovery and selection journey. With more time, I would test the product-comparison and checkout flows with a broader group of participants and use their feedback to further refine the experience.

16 · After thoughts

After thoughts

Two things I'd improve with more time.

First

Validate the quiz logic

The quiz recommendation logic is simplified — answers map to routines through basic rules, so a real product would need a dermatologist to validate the recommendations before launch.

Second

Test with screen-reader users

Accessibility has only been checked against guidelines: I verified color contrast and tap target sizes, but the design hasn't been tested with screen-reader users yet, which would be my next step.