Bohyun(Baylee) Lee

1. Server Group Management System Development

Period: March 2024 - August 2024

Overview

• Designed and developed an enterprise-wide server group integrated management system following a corporate merger.

Tech Stack

• Spring Boot, MongoDB, Python, Spring Security, JUnit, OpenSearch, ArgoCD

Responsibilities

• Designed and developed RESTful APIs and tables.
• Built infrastructure using the in-house cloud system.
• Implemented application log storage using OpenSearch.
• Established CI/CD pipeline using Git Action and ArgoCD.
• Applied application authentication using Okta.

Achievements & Goals

• Provided grouping functionality for enterprise servers to facilitate convenient server access control.
• Improved financial management within the enterprise through service code management across servers.

2. Role Improvement Project for Security Compliance

Period: June 2023 - November 2023

Overview

• Redesigned and improved control mechanisms of the legacy system to meet new business requirements and resolve security compliance issues.

Tech Stack

• Spring Boot, MongoDB

Responsibilities

• Analyzed legacy system code and designed and developed the required role structure.
• Conducted data migration.

Achievements & Goals

• Enhanced system security.
• Ensured business continuity.

3. Application Management System (Ongoing Tasks)

Overview

• Managed server information for applications and provided ACL functions for the in-house DB cloud system and approval (administrator information) management for the internal access control system.

Tech Stack

• Spring Boot, MongoDB, Kafka, ArgoCD

Responsibilities

• Improved code by upgrading APIs from the existing version to the new version.
• Implement RBAC-based access control.
• Added metrics collection and monitoring.
• Troubleshooted Kafka transactions.
• Integrated with the in-house ArgoCD pipeline.

Achievements & Goals

• Enhanced system reliability through performance optimization and bug fixes of the legacy system.
• Improved code readability and maintainability through system refactoring.

1. Mini-WMS Project

Period March 2022 - September 2022

Overview

• Developed a new system to manage inbound/outbound logistics
• Replaced existing third-party WMS products to streamline warehouse operations.

Tech Stack

• Spring Boot, Spring Data JPA, MariaDB, Amazon Relational Database Service (RDS), Linux, Jenkins, Java, NodeJS, Python

Responsibilities

• Developed inbound/outbound management and master data management (products, vendors, users, etc.).
• Designed database tables and APIs.

Achievements & Goals

• Resolved discrepancies in inventory and inbound/outbound records
• Replaced existing third-party products.

2. Delivery Carrier Change Project

Period February 2022 - March 2022

Overview

• Performed maintenance and new development for carrier change
• Restructured order and delivery logic

Tech Stack

• MariaDB, NodeJS, Python

Responsibilities

• Modified existing delivery batch processes.
• Developed new batch processes.
• Assessed impact of changes in delivery policies.

Achievements

• Successfully changed the delivery carrier.

3. Purchase Order Admin Project

Period July 2021 - February 2022

Overview

• Developed a new system for integrated management of purchase orders, inbound logistics, settlements, and vendor management
• Allowing the logistics and MD teams to accurately manage purchase order details.

Tech Stack

• Spring Boot, Spring Data JPA, MariaDB, Linux, Jenkins, Java, NodeJS, Python

Responsibilities

• Developed APIs and database tables
• Developed common modules (error handling, utilities)
• login (custom JWT token authentication, Firebase authentication)

Achievements

• Reduced communication costs with vendors for the MD team through automated notification services (KakaoTalk, Slack, email).
• Enabled management of supply prices and product history.

4. Ongoing Tasks

Overview

• Operated WMS batch processes.
• Processed data related to customer service issues for delivery and inventory.

Tech Stack

• Python, Jenkins, MariaDB, NodeJS

1. DB Operations

Period: July 2020 - July 2021

Responsibilities

• Set up MariaDB and PostgreSQL.
• Established Galera Cluster for MariaDB.
• Performed DB and query tuning for Oracle and MariaDB.
• Supported operational tasks for the development team.

2. Metadata System maintenance

Overview

• Developed and maintained a metadata system for managing data used in services. The system managed data such as DDL, data migration, item management, and domain management.

Tech Stack

• Spring (e-Government Framework), Java 1.7, MariaDB 10.4, Linux, Jeus, MongoDB 3.22

Responsibilities

• Developed and maintained the metadata system.
• Tuned slow queries in the metadata system.
• Managed batch processes.