About Donz
An IT consultant connecting data, platforms, and people
Enterprise IT experience in Korea and Japan, from data architecture to platform development, designing technology tailored to your business.
Story
Starting my career as a developer in Korea, I gained extensive hands-on experience across both Korea and Japan, working on major SI projects for NTT docomo, Fujitsu, Hitachi, and other leading Japanese enterprises in Tokyo.
After returning to Korea, I grew into a data architect through diverse enterprise projects including Ssangyong E&C ERP, Woongjin BookClub SLP design, T-World MSA migration, and ING Life AI chatbot.
Currently, I'm focused on building data-driven decision-making platforms as a Palantir Foundry specialist at a major Korean construction firm.
Philosophy
Simplifying complex data,
Turning technology into business value
Expertise
Proven technical capabilities in enterprise environments
๐ท
Palantir Foundry
Ontology design, PySpark ETL pipelines, Workshop/Action development, RBAC access control setup
๐๏ธ
Data Architecture
Large-scale data modeling (250~650+ tables), ERD design, DB migration & performance optimization
โ
Backend Development
Java, Spring Boot, RESTful API design/development, PL/SQL, Oracle/MySQL-based system development
โธ๏ธ
MSA & Container
Kubernetes-based microservice architecture design, Docker container operations, CI/CD automation
๐ค
AI & Chatbot
IBM Watson-based AI chatbot development, NLP system development, AI platform broker integration
๐
System Modernization
Kafka/Redis event-driven architecture, legacy system modernization, ELK monitoring setup
Career & Projects
20+ years of enterprise IT career โ Korea & Japan
2023.08 ~ Present
Major Korean Construction Firm
Palantir Foundry Development/Operations
- โข D-Selection partner evaluation system (Ontology, Dataset, Workshop)
- โข Project management system (PySpark ETL, RBAC, Dashboard)
- โข Subcontractor management system (Webhook, Action, 3rd Party integration)
Palantir FoundryPySparkTypeScriptOntologyWorkshop
2023.01 ~ 2023.07
SK Rent-a-Car
PL / Design / Development
- โข SK Rent-a-Car new system โ TO-BE ERD design (billing/payment/collection/overdue)
- โข AS-IS analysis (Oracle procedures, xplatform) & data migration
- โข Water University distribution structure design โ suppliers/dealers/customers, tax invoice 3rd Party integration
Spring BootJPAReactVue.jsOracleToast Grid
2020.11 ~ 2022.12
Woongjin
WRMS Rental Solution PL
- โข Full audit of 650 tables & business-specific relationship redesign
- โข Hana Capital factoring bond integration (identity verification/credit check/sale/payment)
- โข Hyosung FMS PG payment module โ recurring/non-recurring payments, overdue processing
- โข CERAGEM WRMS rental solution financing consulting
JavaSpringPostgreSQLREST APIPG integration
2017.05 ~ 2020.11
T-World
PM / PL / Design / Development
- โข T-World MSA migration โ Kubernetes, Docker, Kafka-ELK, Spring Boot
- โข Smilegate back-office โ Kafka-based real-time VOC processing, Redis bulk Push
- โข ING Life FC Chatbot โ IBM Watson Conversation AI chatbot design & development
- โข KB Savings Bank Kiwi Bank โ mobile authentication, reverse transaction service
- โข AIBRIL AI Platform โ IBM Watson AI Broker integration module
KubernetesDockerKafkaRedisIBM WatsonSpring Boot
2014.10 ~ 2017.05
Woongjin BookClub
PL / Design / Development
- โข Woongjin BookClub 2.0 โ DB schema design, new back-office (annual revenue KRW 100B basis)
- โข BookPad standardization โ Boilerplate reducing Yoon's English/Montessori production time
- โข K-ICT New Software Product Grand Prize from Ministry of Science, ICT
- โข AWS S3 integration, DRM packing, large-scale multi-thread optimization
Spring BootThymeleafOAuthAWS S3OracleSwagger
2013.10 ~ 2014.10
KT Innoedu
PL / Design / Development
- โข KT HQ education system integration (courses/sessions/codes/members/organization)
- โข LOMS government monitoring program & HRD Korea integration
- โข Source code standardization through reverse engineering
JavaStrutsQuartzOraclePC/Mobile progress sync
2010.06 ~ 2013.09
Ssangyong E&C
Common Admin / Design / Development
- โข Ssangyong E&C ERP โ 10M+ records large-scale DB customization
- โข Construction defect process optimization: 1 month โ 3 days
- โข 2014 new address company-wide system design & migration
- โข ERP approval system-smartphone API module development
JavaSpringOraclePL/SQLANTCVS
๐ฏ๐ต 2005.01 ~ 2010.04
Ilhan Information Systems (Tokyo)
SI Development
- โข NTT docomo โ CRM development, map service UI, 3G notification service
- โข Fujitsu โ Mori Building real estate/accounting system, Unix migration scripts
- โข Hitachi Information โ HR/payroll system, financial institution batch design & development
JavaEclipse RCPPL/SQLUnix ShellOracle
๐ฏ๐ต 2004.01 ~ 2004.10
Profetsa Inc. (Tokyo)
SI / In-house System Development
- โข In-house framework (pro-j f/w) & common utility development
- โข Job Navi 2006 โ search indexing system (DB design/development)
- โข Hitachi โ equipment catalog search & automated DM delivery system
JavaJSPOracleDB Design
2001.01 ~ 2002.12
Entropics
In-house System Development
- โข goinstone.com game site โ Java applet game development
- โข Internet lottery/avatar/chat system development
- โข Game-linked points/e-money/prize system development
JavaJSPAppletCustom Framework
Clients
Enterprise clients who partnered with DonzBox
Major Korean Construction Firm
2023 ~ Present
Palantir Foundry
SK Rent-a-Car
2023
Rental System
Woongjin
2020 ~ 2022
WRMS Rental
KB Savings Bank
2020
Kiwi Bank
Smilegate
2019 ~ 2020
Kafka/Redis
SK T-World
2018 ~ 2019
MSA/K8S
ING Life Insurance
2017 ~ 2018
AI Chatbot
Woongjin BookClub
2014 ~ 2017
BookPad Platform
KT Innoedu
2013 ~ 2014
Education System
Ssangyong E&C
2010 ~ 2013
ERP
NTT docomo ๐ฏ๐ต
2008 ~ 2010
CRM / Map Service
Fujitsu ๐ฏ๐ต
2007 ~ 2008
Real Estate/Accounting
Hitachi Information ๐ฏ๐ต
2005 ~ 2006
HR/Payroll/Finance
Designing complex data simply,
Connecting technology to business value.- Donz Lee -
