Seongwook Hwang

Software Engineer, LLM Engineer, AI Agent Workflow Engineer, MES Engineer

Innovative MLOps engineer with a strong focus on delivering AI inference APIs optimized for high-traffic application services. Skilled in utilizing Kafka, and Confluent Cloud to ensure scalable and efficient data streaming. Adept at deploying AI solutions with FastAPI and Kubernetes to support real-time, reliable, and high-performance workloads. also Manufacturing Execution System (MES) Engineer with proven experience delivering large-scale MES solutions for automotive, battery, and seat manufacturing at Hyundai Motor Company, Samsung SDI, and Samsung Electronics. Skilled in integrating MES platforms with PLC/SCADA systems. and Within just four months of joining my current role(Hyundai Motor Vehicle Seat MES), I successfully resolved persistent performance issues within our MES (Manufacturing Execution System) and integrated an AI vision system into our production lines.

  • AWS Certified Machine Learning Engineer Associate
  • AWS Certified Solutions Architect Associate
  • AWS Certified Data Engineer Associate
  • Certified Kubernetes Administrator
  • An expert in designing AI agent RAG pipelines and workflows to boost efficiency and save time, committed to leveraging AI models for developing practical, real-world services.

Portfolio

AI MLOps Runway
Hyundai Transys Seat MES

Operate, maintain, and enhance MES systems for automotive seat production lines • Integrate MES with PLC/SCADA systems for real-time and Equipment communication and production data collection. • Customize MES modules to meet evolving operational requirements, improving production efficiency and reducing downtime

Tech Stack:
C#, .NET, Tibero DB, Oracle DB, SCADA, Git, PLC, SAP EAI

AI MLOps Runway
AI MLOps Platform: Runway

Developed a cloud-native MLOps platform enabling end-to-end AI model deployment, monitoring, and lifecycle management. Engineered robust API layers and orchestrated Kubernetes-based inference workloads for scalable real-time AI service delivery.

Tech Stack:
Python, FastAPI, SQLAlchemy, Postgres, Kubernetes, Helm, Prometheus, Grafana, Git, ArgoCD, ElasticSearch, S3, Poetry

SendAnywhere File Service
SendAnywhere File Transfer

Designed and implemented a secure and scalable file transfer service in a global cloud environment. Utilized AWS services to optimize content delivery using CloudFront and object storage through S3. Integrated IAM-based access control and monitoring with CloudWatch for reliable operation.

Tech Stack:
Python, Django, S3 Storage, CDN, DynamoDB, Redis, AWS IAM, Jenkins, Git, REST API, Token, SSL

Kakao Music Service
Kakao Music

Developed and maintained a large-scale music streaming platform under Kakao, ensuring high availability and low latency in handling massive concurrent user traffic. Led the design and implementation of RESTful APIs and real-time data processing pipelines.

Tech Stack:
Java, SpringBoot, JPA, Postgres, Kafka, Redis, Docker, Kubernetes, Jenkins, JWT, SSL

MES Plus Project
MES Plus – Hanwha Qcells Project

Developed a customized MES (Manufacturing Execution System) solution for Hanwha Qcells’ solar panel factory in Georgia, Dalton. Integrated real-time equipment control using middleware (MC, Highway101) and implemented material inventory tracking and label issuing at the shipment stage. Successfully deployed the entire production line configuration, resulting in a CEO commendation for outstanding project delivery.

Tech Stack:
C#, .NET Framework, Oracle DB, ODBC, MC Middleware, Highway101, MES Custom Module

Samsung SDI AceLine Project
MES PLUS & Equipment Control – Samsung SDI

Led MES development and operational support for the AceLine at Samsung SDI’s EV battery manufacturing site in Giheung. Covered full production processes from mixing, assembly, formation to shipment by developing and maintaining C#-based MES applications. Handled real-time equipment monitoring and communication through middleware, ensuring reliable operations and synchronized data flows across stages. Designed and executed complex Oracle queries to mine and analyze material inventory data for process optimization.

Tech Stack:
C#, .NET Framework, Oracle, MES System, Middleware Equipment Control, Data Mining, ODBC, Manufacturing Automation

OHDSI Collaborator
OHDSI Collaborator

Selected as an official collaborator by OHDSI (Observational Health Data Sciences and Informatics), an international collaborative to bring out the value of health data through large-scale analytics. Contributed to global biomedical data standardization and participated in open-source projects to improve observational healthcare data modeling.

Focus Areas:
OMOP CDM, Data Standardization, Open Source Contribution, Biomedical Informatics, International Research Collaboration

Samsung Securities System Operation
HTS – Samsung Securities

Designed and maintained high-performance backend systems for Samsung Securities’ trust services, leveraging C# and the .NET Framework. Developed and scheduled automated batch jobs using Linux Crontab, optimizing key trust operations. Played a key role in managing development, testing, staging, and production environments with strict QA workflows and secure deployment pipelines—essential for mission-critical financial applications.

Tech Stack:
C#, .NET Framework, SQL Server, Linux Crontab, Batch Automation, Environment Management, Secure Deployment

FullStack Portfolio
Piano Lesson – Architecture & Cloud Developer & FullStack Developer & Design

Built a piano lesson blog project leveraging AWS services for scalable and efficient operations. The architecture includes S3 for storage, Lambda for serverless computing, DynamoDB for fast data access, and SNS,SES for notifications, AI inference(Bedrock for GenAI) all monitored with CloudWatch and secured with Route 53. This setup highlights my proficiency in AWS cloud solutions for applications.

Tech Stack:
AWS Lambda, S3, DynamoDB, CloudFront, SNS, SES, Certificate Manager, Route53, API Gateway, JavaScript, Figma

Skills

Programming Languages & Tools
Workflow

Architecture
Piano Lesson Architecture

Experience

Python Backend Developer

MakinaRocks(AI Startup)

Developed Runway product features including data source and pipeline management; built an MLOps service for model application and inference placement in Corning’s infrastructure; utilized FastAPI, Kubernetes, and SQL Server for scalable, high-performance backend solutions

Mar 2023 - Sep 2024

Python Backend Developer

Rakuten Symphony(rakuten group)

Created a stable AWS infrastructure for user storage services like Dropbox; contributed to Rakuten Mail PoC using Apache James; managed RESTful API development with Spring Boot and integrated CI/CD pipelines using Jenkins and Kubernetes

Feb 2022 - Feb 2023

Java Backend Developer

dktechin(kakao group)

Developed and optimized Kakao Music services to handle high-capacity traffic; implemented RESTful APIs using Spring Boot; worked with MongoDB, Kafka, and Kubernetes for reliable, large-scale service management.

Mar 2020 - Feb 2022

OHDSI Collaborator

Collaborator at OHDSI(Observational Health Data Sciences and Informatics)

Contributed to collaborative research on real-world health data analysis; Engaged with a global network of researchers to improve healthcare analytics; Focused on applying AI and MLOps methodologies to health informatics.

Jul 2019 - Mar 2020

Tech Team leader, Java & Python Backend Developer

Ajou University Medical Center Labs

Led the development of large-scale medical data modeling infrastructure for the OHDSI Symposium; utilized AWS Cloud services like S3 and Redshift; managed CI/CD with Jenkins and Docker.

Jul 2019 - Mar 2020

Java & C# Developer

MIRACOM(Samsumg Group)

Developed backend systems for Samsung’s semiconductor and battery manufacturing lines; created infrastructure and OS request portal for Samsung SDS; worked with MES systems, Java, C# .NET, and SQL for robust production solutions.

Oct 2011 - Jul 2019

JavaScript Developer

KOTRA(Korea Trade-Investment Promotion Agency)

Refined data from global trade offices, managed and updated portal information, and developed web applications while improving functionality using MySQL and JavaScript.

Jan 2010 - Feb 2011

Software Engineer

Lotte Finance Capital(Lotte Group)

Planned and implemented IT services and strategies for finance; led BPR and ISP initiatives to improve operational efficiency; developed Java-based financial applications with Oracle database integration.

Jan 2008 - May 2009

Education

University of Yonsei(SEOUL)

MASTER OF SCIENCE
Information System - Architecture, Design, NLP
Aug 2019

University of Hanyang(SEOUL)

BACHELOR OF SCIENCE
Industrial Engineering - Operations Research
Aug 2007

Certifications

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

Yonsei University (2019.08)

A comparative Study on the Service Acceptance of Service Users with or without Bandwagon Effects: Focused on Kakao Bank

APDSI (2019.07)

A Case Study of the Mobile Giving Platforms Based on Construal Level Theory: Focused on Big-walk and Tree Planet

ISR (2015.12)