Jang Dongjae
Co-CEO · Planning/Ops
Ran a video production studio and an event agency, and led DX at a mid-size event agency. Rooted in video production and on-site event operations.
Team
An event-experienced development team asks different questions first.
Event-planning experience and engineering work as one team, so planners do not have to rewrite an event brief as technical specifications.
0+
Events & Deliveries
Core SW
Built directly by the two-person team
Agreed scope
Design → delivery
2025.08
Founded
WHAT WE DO
Seven Systems Built Around Event Operations
We design event websites, registration and access, booking, NFC networking, kiosks, display walls, and workforce records around the event flow. Planners do not need to translate requirements into developer language. Full event operations are scoped separately.
Compare all seven systems →EVENT WEBSITE & REGISTRATION FORM
EVENT REGISTRATION & ACCESS
EVENT APPOINTMENT & MEETING BOOKING
NFC BADGES & EVENT NETWORKING
EVENT KIOSK RENTAL & CONTENT
REAL-TIME DISPLAY WALL
TEMPORARY EVENT WORKFORCE RECORDS
From Design to Delivery, Within the Agreed Scope
We build the core software directly. Installation and operational support follow the contracted scope.
1
Define
Start with the event goal, participant flow, and on-site conditions.
2
Design
Turn the required screens, data, and operator tools into a delivery scope.
3
Build Directly
The two-person team builds the agreed core software directly.
4
Test & Install
Test before delivery, then install equipment and train operators when included.
5
Operational Support
Provide event-day technical support when it is part of the contract.
01
Core Software Built Directly
The two-person team designs and develops the agreed core software for each event.
02
Speak in Event Terms
Planners can describe the participant flow and field conditions without translating them into developer terminology.
03
Scope Before Delivery
Installation, training, and on-site support are defined in the quote and contract.
Brand Story
Why ‘zzzarit’
It started when the AR service ‘kkkAR’ met IT.
ㅋㅋㅋkkkAR
zzzKO/EN key
zzzarit+ IT
짜릿reads as
Type ‘ㅋㅋㅋ’ with the Korean/English key toggled and it turns into ‘zzz’. Add IT and you get zzzarit — read aloud, ‘zzarit (짜릿).’ AR meets IT to spark the moment.
Vowels turned lightning
The logo is a lightning bolt drawn from the vowels ㅏ and ㅣ in ‘짜릿’ — the electric moment that wakes an event up.
Team
People who have built events work alongside people who have built software.
Lee Seungjun
Co-CEO · Engineering
A developer who ran his own software studio. Designs and builds the products and systems himself.
TimelineScheduledScheduled
What We've Done
Every event we ran and every solution we delivered — in one place.
Upcoming Events
Yonsei University Event
Yonsei University Physician-Scientist Expo
Events
2025 Yonsei Research Expo
Yonsei University College of Medicine
QR Pre-registration System Build & OpsOn-site StaffingEvent Flow Support
2025 Physician-Scientist Global Networking Symposium
Banyan Tree Club & Spa Seoul, Festa Hall
Full Symposium OperationsVIP ProtocolBanyan Tree Reservation · Contract · Check-in/outIncheon Airport PickupReturn-flight Support
2025 Medical Students Overseas Training Bootcamp Presentation
Yonsei University College of Medicine
Event Planning & OperationsPresentation Materials Coordination & UploadOn-site StaffingVideo Recording
2026 Yonsei Physician-Scientist Workshop
Grand Hyatt Incheon
Full Event Planning & OperationsBreakfast Meeting SupportFinal Report Production
Ajou University Community-Based Medical Education Outcomes Symposium
Ramada Plaza Suwon Hotel, Topaz Hall
PMAudio OperationsMCDesignStaffing
Ajou University IPE Program 'Together in Care'
Suwon Convention Center Hall 401
PMMCPhotography & VideoQR Name Badges × 60Team Placards
Ajou University IPE Program Outcomes Symposium
Courtyard by Marriott Suwon Lake Park Ballroom
PMMCDesignStaffing × 2QR Name Badges × 60 · Placards × 10X-Banners × 2 · Banner × 1Photography & Sketch Shots
Yonsei University Digital Healthcare Bootcamp
Yonsei University College of Medicine, General Building Room 331
Full Event Planning & OperationsDedicated On-site StaffAttendance & Lecture OperationsPresentations, Judging & AwardsPhoto Kiosk BoothMaking Film & Sketch PhotographyCatering & Print SupportPrize Operations
Deliveries
CGDC 2025 Website
→ Console Game Developer Conference 2025 (cgdc.kr)
Korea's First Global Console Game Conference Official SiteAstro-based Static Site Planning & DevelopmentFull Frontend Build & Deployment
Promotional Video Production · Website IA
→ G-Game Connect 2025
G-Bus Promo Videos × 3Website Information Architecture Design
QR Access System
→ 2025 Yonsei Research Expo
Pre-registration FormPersonal QR DistributionOn-site Scan Check-inWalk-in Registration
NFC Name Badge Solution
→ Outsome Founder Sprint
Badge Design & ProductionNFC Sticker ProgrammingOne-tap Contact ExchangeNetworking Enhancement
QR Name Badge System
→ Ajou University IPE Program
60 Individual QR CodesIdentity VerificationAttendance Tracking
Five Elements Fortune Kiosk
→ Tentseoul (Fortune Expo, Booth A-011)
Birth Date/Time InputFive Elements AnalysisOn-spot Receipt PrintManaged the on-site queue
Cafe Website & Search Optimization
→ Cafe Woodvine
Bulk Event-order Channel StrategyWebsite DevelopmentNaver Booking Integration for 9 ProductsGoogle · Naver · Daum · AI Search Optimization
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Company
- zzzarit Inc.
- Founded August 2025
- Co-CEOs Jang Dongjae · Lee Seungjun
- Business Reg. 694-86-04033
- S34,S35, 10F, 202-dong, 18 Bucheon-ro 198beon-gil, Wonmi-gu, Bucheon-si, Gyeonggi-do, Korea (Chunui Techno Park II)