MLOps Engineer
AI Operations
Data Engineer
+ Instacart Live Orders
Industrial AI Vision Ops
High-Traffic Backend
OPENTIDEKOREA
CEO Award Recipient
SDS AMERICA
Apr 2026 – Present
Medical AI / AWS CDM
Portfolio
ZipMenu: AI Food Guide + Live Ordering
An AI-powered food recommendation SaaS that turns local weather data and US Zip Codes into personalized dining suggestions — answering the daily "What should I eat?" dilemma. Integrated Instacart API for one-click grocery ordering, closing the loop from AI recommendation to real purchase fulfillment.
MLOps Platform: Runway
Core contributor to Runway, MakinaRocks' enterprise MLOps platform. Engineered end-to-end data pipeline management, model deployment infrastructure, and high-performance backend services on FastAPI, Kubernetes, and SQL Server.
- Built ETL pipeline transforming manufacturing equipment data into optimized Parquet format
- Implemented versioned dataset storage for reproducible model training
- Designed container image snapshot functionality for environment packaging
- Created image annotation visualization tooling for data labeling workflows
- Integrated SSO/JWT authentication for enterprise-grade access control
Samsung Group: Enterprise Systems
8 years of mission-critical MES and enterprise systems across Samsung's semiconductor, battery, and solar manufacturing lines. Built production-grade backends in Java, C# .NET, and Oracle with a focus on real-time equipment control and data synchronization.
- Samsung Electronics FDC — Kafka-based real-time fault detection pipeline; CEO Award recipient
- Samsung SDI AceLine MES — C# .NET + Oracle + Miracom Solution for battery production line
- Samsung Fire & Marine — WebLogic Middleware integration and maintenance
- Samsung SDS SR Portal — Java + MyBatis + Oracle service request portal improvement
- Hanwha Q CELLS (Dalton, GA) — MES initial build for U.S. solar manufacturing plant; C# .NET + Oracle + Miracom Solution
Kakao Music: 1M+ DAU Scale
Optimized backend services for Kakao Music to sustain high-capacity streaming traffic at scale. Built RESTful APIs on Spring Boot with Kafka event streaming, MongoDB persistence, and Kubernetes orchestration — delivering measurable improvements in throughput and system response times.
Rakuten: Send Anywhere Service
Engineered AWS cloud infrastructure for Send Anywhere's global-scale file transfer service, supporting millions of concurrent users. Built and maintained RESTful APIs with automated CI/CD pipelines (Jenkins, Kubernetes), ensuring high availability and rapid release cycles.
OHDSI: Medical Data Infrastructure
Sole IT engineer in a cross-functional medical research team led by Prof. Rae Woong Park, a globally recognized OHDSI leader.
- Architected cloud-based clinical data platform on AWS (S3, Redshift), standardizing large-scale EMR datasets into OMOP CDM format
- Deployed ATLAS research platform on AWS, enabling physicians to run cohort analyses without on-premises constraints
- Recognized as an official OHDSI International Collaborator at the 2019 Symposium for contributions to medical informatics
Hyundai Transys: Industrial AI Ops
Deployed at Hyundai Motor Group Metaplant America (HMGMA), Georgia — a $7.6B flagship smart factory and the most automated automotive plant in North America.
- Integrated AI vision systems with the production floor for real-time defect detection and closed-loop MES feedback
- Optimized DB performance via partitioning, schema tuning, and connection pooling — reducing CPU load by 7%
- Refactored MES–PLC communication logic, boosting production throughput (UPH) from 36 to 45 (+25%)
- Built bidirectional data recording for ADSEM Bolt tool, achieving 100% quality traceability
- Created shipment and production status dashboard for real-time monitoring and predictive logistics
n8n Workflow Automation
Designed and shipped end-to-end automation workflows using n8n — from architecture planning to production deployment — tailored to each client's operational needs.
- AI News Monitor — scheduled Naver news scraping → LLM sentiment analysis → Notion DB auto-sync
- Lead Pipeline — form submission → CRM entry → Slack alert → follow-up email, zero manual steps
- Custom Architecture Design — whiteboard-to-production system diagrams optimized per client workflow and scale
- Multi-service Integration — webhooks, REST APIs, Google Sheets, Slack, Notion, Calendar, and more
TailorCV
AI-powered resume optimization tool that tailors your resume to pass ATS screening and align with any job description — built with GPT 4.1 and Claude API.
- JD Keyword Analysis — match scoring between resume and JD with gap highlights
- Resume Reconstruction — LLM rewrites resume content to reflect JD language and priorities
- Cover Letter Generator — tailored cover letter with company research and role-specific positioning
- Strength Analysis — identifies which experiences are the strongest signals for the target role
- Inline Edit + PDF Export — edit directly in-app and export finalized resume and cover letter
Side Projects
Music Memory Quiz
A piano memorization practice app for music students. Students answer quiz questions about the piece they're learning, and LLM-generated hints guide them progressively — reinforcing memory through active recall without giving away the answer.
Piano Studio Automation & MindCare
An automated booking system for a piano studio — lesson consultation requests are instantly synced to the admin's calendar via n8n workflow automation. Also includes MindCare, a companion wellness feature where GPT-powered AI analyzes student emotional patterns and generates personalized heart letters for parents.
DailyKeys: Piano Practice Growth Platform
A mobile-first app where piano students log practice sessions by recording performances and tagging the piece played. Teachers and parents can watch videos and track each student's musical growth over time — presented in an Instagram-style feed layout for an intuitive, engaging experience.
Experience
Gen AI Engineer
Developing and deploying Generative AI solutions for enterprise clients as part of Samsung SDS America's AI practice. Leveraging expertise in Foundation Models, MLOps pipelines, and cloud infrastructure to deliver production-ready Gen AI systems at scale.
Founder & Lead Engineer
Founded and independently built Zipmenu from the ground up, sole developer responsible for full-stack architecture, product development, and go-to-market launch. Architected a production-ready AI SaaS with full MLOps lifecycle — from Foundation Model integration and AWS Serverless architecture to automated billing via Stripe API. Extended the platform with Instacart API integration, enabling users to place real grocery orders directly from AI-generated food recommendations.
Assistant Manager
Hyundai Motor Group's $7.6B flagship smart factory in the U.S., the most automated automotive plant in North America. Engineered high-speed communication protocols integrating AI vision systems with the production floor, enabling real-time defect detection and closed-loop MES feedback. Optimized large-scale database performance through table partitioning, schema tuning, and connection pooling — reducing server CPU load by 7%. Refactored SQL queries and redesigned indexing strategies to ensure long-term data integrity for quality traceability.
MLOps Engineer
Industrial AI startup recognized as a CB Insights AI 100 (2023) honoree and World Economic Forum Technology Pioneer, backed by $25M+ from Hyundai Motor Group, SK Telecom, GS, and Hanwha. Engineered core features for Runway, MakinaRocks' enterprise MLOps platform — including data pipeline management, dataset versioning, and model deployment infrastructure. Built high-performance backend services using FastAPI and Kubernetes to support AI model inference at enterprise scale. Developed image annotation visualization tooling and SSO/JWT authentication, improving platform usability for enterprise clients.
Cloud Infrastructure Architect & Developer
Engineered AWS cloud infrastructure supporting large-scale file transfer services for Send Anywhere, handling millions of concurrent users. Built and maintained RESTful APIs with automated CI/CD pipelines (Jenkins, Kubernetes), improving deployment reliability and release velocity.
Backend Engineer, High-Scale Distributed Systems
Kakao's development subsidiary. Developed and optimized backend services for Kakao Music, handling high-capacity traffic at scale. Built RESTful APIs using Spring Boot, Kafka, and MongoDB to support large-scale streaming services. Implemented Kubernetes-based infrastructure to manage distributed workloads and improve system response times.
Tech Team Lead, Data Infrastructure
Led large-scale medical data infrastructure for the OHDSI International Symposium on distributed health research networks. Architected AWS infrastructure (Redshift, S3, EC2) for medical big data research pipelines. Managed CI/CD workflows using Jenkins and Docker, ensuring data governance and pipeline reliability. Recognized as an official OHDSI Collaborator for contributions to the international OMOP CDM research network.
Senior MES Systems Architect
Delivered MES solutions for Samsung Electronics, Samsung SDI, Samsung SDS, and Hanwha Q CELLS America, spanning semiconductor, battery, and solar manufacturing lines. Built backend systems using Java/Spring Boot, C# .NET, and Oracle, with a focus on equipment control and real-time data synchronization. Achieved Samsung SW Certification (Advanced level).
Contract Associate
Supported foreign direct investment (FDI) promotion initiatives within KOTRA's Foreign Investment Support Division. Aggregated trade office intelligence from global KOTRA branches and produced periodic newsletters distributed to investors and stakeholders. Managed and maintained the Foreign Investment Support web portal, ensuring timely updates and content accuracy. Coordinated logistics and operational support for FDI-related trade fairs and promotional events.
Retail Banking Associate
Jeju Bank, a regional banking institution and affiliate of Shinhan Financial Group. Selected through a competitive nationwide recruitment process. Managed retail banking operations at the branch counter, including customer transactions, account services, and financial product consultation.
Software Engineer, Financial Systems
Selected through Lotte Group's competitive nationwide recruitment program. Planned and implemented IT strategies for financial services; led Business Process Re-engineering (BPR) and IT Strategic Planning (ISP) initiatives to improve operational efficiency; developed Java-based financial applications with Oracle database integration.
Education
Yonsei University (Seoul)
Hanyang University (Seoul)
Skills
- Model Deployment Automation & GPU Resource Optimization
- Kubernetes (CKA) Orchestration for Inference Workloads
- Gen AI & LLM — LangGraph, RAG, VectorDB, Foundation Models, Prompt Engineering, Streamlit
- MLOps Platform — Data Pipeline, Dataset Versioning, Model Registry, Inference Server, CI/CD
- Cloud & Infrastructure — AWS (S3, Redshift, EC2, Lambda, DynamoDB), Serverless Architecture
- Backend Engineering — FastAPI, Spring Boot, C# .NET, RESTful API Design, Microservices
- Data Engineering — Kafka, MongoDB, SQL Server, Oracle, Redis, ELK, Parquet, ETL Pipelines
- Industrial AI — MES, PLC Communication, AI Vision Systems, Real-Time Defect Detection
- Security — CISSP, SSO/JWT Authentication, OAuth
- Agile & Leadership — Scrum Master, Sprint Planning, Feature Prioritization, PR Reviews
Certifications
- NVIDIA Certified Professional: AI Operations
- NVIDIA Certified Associate: AI Infrastructure & Operations
- CKA: Certified Kubernetes Administrator
- AWS Certified Machine Learning Engineer Associate
- AWS Certified AI Practitioner
- AWS Certified Data Engineer Associate
- AWS Certified Solutions Architect Associate
- AWS Certified Cloud Practitioner (CLF)
- CISSP: Certified Information Systems Security Professional
- CCNA: Cisco Certified Network Associate Routing and Switching
- SCJP: SunMicroSystem Certified Java SE Programmer
- Engineer of Auto Information Processing (정보처리기사)
- Korean Hanja Proficiency Certificate – Level 2
- 新HSK Level-3 (Chinese Proficiency)
Paper
A Study on the Influence of Happiness Score on the Movement of Residence in the Noise Complaints Focused on the Complaint Board in Seoul
Key Contribution: Built an automated data pipeline to crawl civil complaint boards in Seoul. Utilized NLP (Natural Language Processing) to analyze social sentiment and proposed data-driven solutions for urban noise issues across Seoul districts.
A comparative Study on the Service Acceptance of Service Users with or without Bandwagon Effects: Focused on Kakao Bank
Key Contribution: Analyzed the diffusion of fintech services using the 'Bandwagon Effect' theory. Presented research on factors influencing service acceptance among Kakao Bank users at the international APDSI conference.
A Case Study of the Mobile Giving Platforms Based on Construal Level Theory: Focused on Big-walk and Tree Planet
Key Contribution: Conducted an in-depth case study on social contribution platforms. Recognized by ISR for applying 'Construal Level Theory' to analyze user engagement and business model sustainability in the mobile ecosystem.