Sanghyeon Shin · Service Planning · PMa91945840@gmail.com

A service planner who finds the answer in what users actually do, then builds and ships.

As a LIKELION intern, I planned and ran a community platform for 80 universities and took a 2,500-person national hackathon from planning through the finals. With a limited ops team, I built automation tools myself and put them to work where the bottlenecks were: participant inquiries, checking 562 submitted repos, and tallying the finals.

Beyond that, over two years I've built, shipped, and run 15+ services myself, from screens to backend and AI tooling, and learned that what makes a plan convincing isn't the finished screen, but what I decided about the user and on what evidence. Next, I want to make the next decision from the data users leave behind, and check that decision with users again.

hackathon participants: 2,500
universities — community platform: 80
services planned & shipped: 15+
awards: 11

Profile.

EducationHankuk University of Foreign Studies (HUFS)Global Business & Technology / Software & AI Track (Double Major) · GPA 4.14 / 4.5 · Graduated2020.03 – 2026.02
TrainingSSAFY 15th Cohort · Non-CS Java Track (Left Early)Samsung SW·AI Academy For Youth2026.01 – 2026.04
CertificationsSQL Developer (SQLD)Korea Data Agency2024.06
Advanced Data Analytics Semi-Professional (ADsP)Korea Data Agency2025.09
OPIc IHACTFL2025.10
MilitaryROK Army, Sergeant, Honorable Discharge2021.10 – 2023.04

What I do.

Service planning
User research
Policy design
Business models
IR pitching
Figma
React
Next.js
Python
Supabase
LLM APIs

How I work.

01
I find the problem in what users actually do.
I start by watching how users and operators really move, and I re-check common assumptions against data. The point where people keep getting stuck becomes the problem the product has to solve.
02
I turn that problem into a flow and rules, and build it myself.
I design the user flow and the policy, and when needed I build it myself, from the screens to the backend and AI tooling, so it becomes a product that actually runs. Being able to check that it works as planned cuts the communication cost between planning and development.
03
After launch, I watch users and fix it again.
Launch is where user data starts coming in. I run the product where it's actually used and feed the questions and problems back into it.

See how the three steps played out in the projects

Changes I can prove in numbers

Only what actually changed in operations.

01OPERATIONAL IMPACT

3 hrs/day15 min/day (−92%)
Participant inquiries
The FAQ bot answered 80.8% of inquiries instantly by keyword, and the staff spent 15 minutes a day reviewing the bot log and filling in missing answers.
Basis: one month after the FAQ bot · 229 questions · 0 unanswered · staff time includes log review and answer updates · 14th hackathon
Manual check of 562 reposOne full scan
Submission checks
Post-deadline commits, force-pushes, and private flips were detected automatically across every branch, and the staff made the verdicts against criteria agreed before the scan.
Basis: after the 314-team deadline · 5 violations found · 14th hackathon
Tally, then PPTOn screen as votes land
Finals results reveal
Judges' votes gathered in a console I built and reached the stage screen in 2.2 seconds.
Basis: 8-team finals tournament · measured · 14th hackathon
Paper roll callQR scan, auto-logged
13th cohort session attendance
Staff put up a QR code, members scan it on their phones, it's recorded on the server instantly, lateness is judged automatically at the 20-minute mark, and only late or absent members show up on the roll.
Basis: 45 members of HUFS LIKELION's 13th cohort · WelcomeKit PWA

02SCALE

Students on the community platform: 2,500+; 80 universities
14th hackathon submissions: 314 teams; 8-team finals tournament
National ideathon participants: 1,822; 378 projects (incl. late submissions) · 470 satisfaction responses analyzed

Where I've worked.

Apr 27, 2026 – Aug 31, 2026Main role

LIKELION

Community Manager Intern · Univ. Group, Univ. Team 1

Managed 2,500+ students across 80 universities and planned and ran the community platform (opens in a new tab) — designed and QA'd 3 event detail pages so hackathon and ideathon registration ran through the platform, proposed back-office features and fixes, wrote the national hackathon feature spec
Planned platform features for the student-run inter-university hackathon — 4-level permission isolation, automatic school verification, time-based automation policy; specified 26 pages across 10 feature areas and handed off to dev and design
Planned and ran the 14th national hackathon (80 universities, 2,500 participants) through the finals
Took part in the national ideathon (1,822 participants · 378 projects, including late submissions accepted after the deadline) from planning through operations — scoring automation sheet and a 470-response satisfaction report
Planned, built, and taught a 6-session internal dev course for non-developers — 5/5 satisfaction from every attendee

Jan 2026 – Apr 2026
15th Cohort (Left Early)
SSAFY (Samsung SW·AI Academy For Youth)
Studied algorithms, data structures, and Java backend development in the Non-CS Java track; left in April 2026 to join LIKELION as an intern
Jan 2025 – Dec 2025
13th Cohort Staff
HUFS LIKELION
Planned and led educational sessions; managed students and lecture progress for the 13th cohort
Mar 2025 – Nov 2025
Coding Education Volunteer
Pungsaeng High School
Taught frontend and planning: HTML, CSS, JS, React, Figma, Notion

Selected work.

Selected projects where I found the user's problem and built the answer myself. The reasoning behind each decision is on its project page.

01Completed · Finals Aug 2026
LIKELION 14th Hackathon
LIKELION Internship · 14th Hackathon · Jun – Aug 2026
LIKELION's 14th national hackathon 'ANIMAL LEAGUE', with 2,500 participants from 80 universities, run from planning through the finals
DecisionI had the judging criteria agreed before the scan, and designed the checking tool to produce only evidence.
Key impact
participant inquiries · 80.8% of 229 answered instantly · none unanswered
3 hrs/dayto15 min/day
finals reveal · 2.2 s from vote to stage screen
Tally, then PPTtoOn screen as votes land
submission checks · 5 violating teams caught
Manual checkstoOne full scan
Role
Community Manager Intern · Planning & Ops
View project: LIKELION 14th Hackathon
02Award · 5th of 110
FlowPay
B2B Fintech · FIN:NECT Challenge · Jun – Aug 2025
A B2B prototype that automates anonymous corporate-card spending from payment to expense report
DecisionAccounting needs to know who spent, not their real name, so I identified payers with a pseudonymous token.
Key impact
corporate-card reconciliation steps
8 stepsto3 steps
expense report writing
20 min eachtoAutomatic
FIN:NECT Challenge, Encouragement Prize
5th of 110
Role
PM · Frontend · IR
View project: FlowPay
032nd round · top 12% of 247
Y:Wave
LIKELION 13th Hackathon · Jul – Aug 2025
A service that analyzes 390K Gyeonggi local-currency merchants and recommends them by location and spending category
Decision53% of respondents said merchants were hard to find (27%) or too few (26%), so I moved the main screen from a map to a recommendation list.
Key impact
finding a merchant
Searching the maptoRecommended by place & category
evidence · Gyeonggi merchants · 53% in our survey (hard to find 27% + too few 26%)
All 390K analyzed
LIKELION 13th hackathon · 2nd round
Top 12% of 247
Role
PM · Frontend · Design (team of 6)
View project: Y:Wave
04Client project · Completed
CleanB
Client Project · RumiClean · Nov 2025 – completed
RumiClean, a cleaning-matching service connecting Airbnb hosts and cleaners (client project)
DecisionDisputes stop only when the completion standard lives inside the service, so I made five before-and-after photos the condition for completion.
Key impact
completion proof · before/after photos
5 photos
job flow the cleaner screens were derived from
5 states
planning through deployment · wrapped before payments
Delivered
Role
PM · Frontend · Design (team of 3)
View project: CleanB

See all 19 projects

Other projects.

Work beyond the selected projects. Open one to see the background, my role, the results, and what I learned.

See all 19 projects

8 more projects

Awards.

11

Competition awards

Top award per project

2025.11KIITI Winter Conference Idea/App Contest — Excellence Award (SonGeul)KIITI
2025.11G-RISE × College of Business 2025 Startup BM Competition — Grand Prize (dotori)HUFS College of Business
2025.08FIN:NECT Challenge — Encouragement Prize (FlowPay, 5th of 110 teams)Korea Fintech Center × KakaoBank

More awards

2025.1212th Bring Your Own Ideas — Grand Prize (Pungsaeng HS assignment notifier)
2025.121st G-RISE Startup Competition — Grand Prize
2025.082025 Spring HUFStudy — Grand Prize (NeuroSight · RZi)
2025.07"PICK YOUR IDEA" IR Pitching — Excellence Award (dotori)
2025.062025 Startup Camp IR Pitching Competition — Grand Prize (dotori)
2025.062025 HUFS H-UP Career Exploration — Truth Award [Grand Prize] (ARtliving)
2025.03Selected as a Student Startup Team, 2025 HUFS Start-up Platform (ARtliving)
2024.117th College of Business × SPRINT Academic Festival — Excellence Award

Portfolio 2026Seoul, Korea

Let's talk.

For hiring or collaboration, email is the fastest way to reach me.

a91945840@gmail.com

A service planner who finds the answer in what users actually do, then builds and ships.

Profile.

What I do.

How I work.

I find the problem in what users actually do.

I turn that problem into a flow and rules, and build it myself.

After launch, I watch users and fix it again.

Changes I can prove in numbers

Where I've worked.

LIKELION

Selected work.

LIKELION 14th Hackathon

FlowPay

Y:Wave

CleanB

Other projects.

Awards.

Let's talk.