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Project Timeline

Aug. 2023 - Now

My Role



UX Designer 

UX Researcher

Carina Zhao (Cofounder, PM)

Rachel Lee (Engineer)

Maxine Liu (Engineer)

Sylvana Poon (UXR)


  • Conduct user research

  • Create digital wireframes, low and high-fidelity prototypes

  • Conduct usability tests

Design Challenge

Many students in Claremont Colleges (5C) were frustrated by the current 5C second-hand platform (Facebook group: 7C for Sale). It was disorganized and not efficient enough for both student buyers and sellers to search for or post second-hand information. 


If students feel there's a big barrier to deal with second-hand items, a lot of books, furnitures, and clothings will be wasted...


A well-organized and easy-to-navigate second hand platform for 5C students.

Design Solution Overview

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Stories Behind ... 

Current 5C Second-hand Platform Observation

Current Facebook Group.png

​Below are 3 of my major observations, which triggered me to take these up and investigate them further. ​​

User Research


  • I conducted 10 user interviews to understand users' needs. The primary user group identified through research were 5C students who have bought or sold or done both second-hand items before. 


  • ​Using affinity map to identify trends and patterns in their second-hand transactions pain points. 

Affinity Map

Research Insights

The user research validated my previous user pain points observation.  ​​​


Student buyers expect to have a better filter system to find matching items more efficiently.​


Student sellers need a personal dashboard to organize their selling information, especially when they have multiple transactions. 


Students buyers are unwilling to make a selling PPT themselves and hope to use existing templates.


User Persona

I created two user personas to synthesize users' core needs and better define the problems I want to tackle. 

User Persona 1
User Persona-1 (2).png

Ideating Solution

​How might we design an online second-hand marketplace (website) to help 5C student buyers and sellers to search or post information more efficiently?  

Based on feedback from the usability tests, there are 3 major improvements in my design 

User Testing and Iteration

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Frame 1.png

High Fidelity Prototype

Browsing and selecting 

Viewing product details
Ordering product

Creating selling listings  Managing transactions 

Style Guide

Style Guide-2.png


What I learned

  • Always connect back to the primary goal

    • Instead of focusing on all feedback from every user, it is more important to grab some of the most important feedback that aligned with your primary goal​

  • Be process-driven, not solution-driven

    • Finding solutions is important, but try to not let solutions limit yourself from brainstorming a wide variety of ideas in the ideation phase

    • Think outside the box and explore wild, whimsical ideas are totally OK 

    • There's never a wrong idea

  • Be aware that you are "the fish in the water"

    • Designers are always "fishes in the water" and might not be able to easily identify users' real needs

    • Avoid making assumptions and try to ask more open-ended questions while talking to users

Next Step

Develop MVP with engineers and invite a small group of users for testing

Establish metrics to measure success 

Balance design goal and business goal 

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