Gyusun Jung

March 2024 - December 2024
CRM Implementation for Hyundai Motor Company

• Migrated approximately 2 billion records from Oracle Siebel to Salesforce using Heroku and Bulk APIs.

File Migration for Hyundai Motor Company

• Developed large-scale file migration solution (10TB, 10 million records) using Java and Heroku to migrate data to Salesforce, including decryption of Oracle Siebel files.
• Implemented asynchronous processing with virtual threads to optimize performance within Salesforce limits.
• Achieved recognition as best practice by client in 2024.

Dec 2023 - Feb 2024
iFlex Framework Development

• Created unified messaging library for SMS, Email, Push notifications, and Kakao Talk using Spring Boot and Java.
• Developed dynamic message interface with Spring Core Plugin for various messaging types.

June 2023 - Nov 2023
Integration of Legacy Systems

• Developed CRUD multilingual pages (English, Chinese, Japanese) and optimized performance for attendance checks.
• Integrated Vue 3 with JSP for modern frontend and implemented drag-and-drop file upload/download features.

June 2022 - May 2023
Revamping Legacy ASP.NET to Spring Boot

• Developed CRUD functionalities for sales, product recommendations, and dietary assessments.
• Implemented modern CTI system and integrated Firebase for push notifications

• Developed solution for deleting outdated personal data using Spring Scheduler, automating query handling in Oracle DB.
• Designed masking procedures for personal data to ensure compliance with privacy regulations.
• Created user and admin bulletin board system with SMS and email notifications for user interactions.