MAS9
Timeline
Responsibility
Led 0-1 Design
Team
Juyeon Nam (Product Designer)
Dongho Ryu (Founder & CEO)
Inhoo Kim (Backend Engineer)
Overview
Context
Goal
Establish core operational features with intuitiveness and usability to streamline school workflows to be the foundation for user adoption and growth.
My Role
Impact
+400% growth in paid active users after redesign
Users praised the platform as "far more intuitive than competitors"
Project 1
Registration Form System Design
Challenge
The platform had no registration form feature, requiring schools to handle all signups manually. Schools needed flexible form functionality for diverse use cases that accommodate both existing members and external participants.
Approach
Given the demanding 0-1 development timeline and limited resources, the primary focus was maximizing system versatility and minimizng setup complexity.
Through informal interviews with school administrators, I found critical requirements that shaped the feature direction.
Parents are the primary users filling out forms. A major friction point was the inability to register multiple children in a single session. The system needed to distinguish between the 'Payer' (Parent) and 'Participant' (Member).
Flexible to Diverse School Operations:
Design a system that accommodates widely varying programs (e.g. Rank promotion test, camps, trials)
Lower Barrier for Admins:
Eliminate the "Interface-Barrier" by prioritizing intuitive setup.
Unified Flow for All User Types:
Created a single flow that differentiates between existing members, new participants, parents, and guardians to prevent data duplication and errors.
Solution
Ready-made templates (trial sign-up, lead capture, memberships, events) with customizable fields reduce admin burden while supporting diverse needs.
Email verification identifies user types (existing member, external participants, family member) to customize registration experience for multiple family members in single session
Distinguish between decision maker (parent) and participant (child) data fields
Result & Learnings
Success
User Insight Discovered
Users didn’t immediately recognize that left-panel items were clickable to add to the form
Lacked clear visual affordances for click-to-add interactions
Future Improvement Opportunities
Project 2
Intelligent Messaging System with AI
Challenge
Schools relied on separate email and SMS tools for announcements, which created critical inefficiency as admins frequently had to switch between tools.
This tool fragmentation resulted in a failure to deliver timely, integrated notification across all member channels, leading to members missing urgent updates (e.g. preventing members from showing up to a canceled class).
Approach
Started by unifying email, SMS and push notification into a single interface. This eliminated tool-switching and established a foundation for faster communication.
During internal testing, we identified that rewriting content for different channel formats was highly repetitive and time-consuming for school operators.
To address this pain point, we decided to implement an AI assistant feature, and I structured the AI workflow
[Delivery Method → Message Topic → Prompt] to reduce cognitive load.
This reduced operator workload while aligning with natural communication behaviors.
Design Decision
Single creation panel with real-time preview across email, SMS, and push notification formats.
Category-First Selection: Primary categories based on common messaging scenarios for quick discovery.
Prompt Library: Secondary level showing specific prompts within selected category.
Variable Customization: Bracket placeholders (dates, event titles) allow users to customize content directly within prompt input stage.
Impact
User Experience
The registration system became one of the most-used features, reducing manual work for admins.
Compared to competitors, MAS9 was consistently praised for its clearer Information Architecture and intuitive navigation.
Business Growth
Improvements directly lowered barriers to adoption, converting prospects into paid users and contributing to a 400%+ increase in paid active users.