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Sangwon Seon
Database Administrator / Database Reliability Engineer
Seoul, South Korea
I am a Database Reliability Engineer with a focus on ensuring database reliability,
performance, and scalability in high-traffic production environments.
My expertise spans ERD design, business data aggregation, query tuning,
data migration, and monitoring & automation across real-world services
serving millions of users.
I approach problems by analyzing root causes from data structure and
execution-flow perspectives, and continuously apply insights from ongoing
learning and hands-on operations to build efficient and stable database systems.
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No-code E-commerce Platform (10M+ Monthly Users) Aurora MySQL (Primary), Aurora PostgreSQL
Around View Intelligent System for Ship(AVISS) MongoDB, MariaDB
Financial & Enterprise Systems (Consumer, HR, EDMS) DB2, MSSQL
- Execution plan analysis and optimizer behavior
- Index and composite index design
- Join strategies (Nested Loop, Sort/Merge, Hash Join) and subquery optimization
- Practical SQL tuning techniques applicable to real-world services
- Core coursework in Database Systems, Operating Systems,
- Software Engineering, Computer Security, and Data Processing
- Foundations in programming, database systems, and operating systems
- Software engineering and information communication fundamentals
Aurora MySQL, Aurora PostgreSQL, MySQL, PostgreSQL, MongoDB, DB2, MSSQL
Schema Design & Modeling, Query Optimization, Data Migration, Monitoring & Automation
AWS, GCP, Docker, Git
SQL, Python, Java, JavaScript
A summary of the differences between hard delete and soft delete and considerations when using them
Thoughts on foreign key usage from a practical perspective
Comparative analysis of MySQL Primary Key data type selection
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It's a blog that records what I study. If you have any questions, please feel free to contact me.
This is my resume. Feel free to ask if you have any questions.
If you have any questions, feel free to contact me.
Seoul, South Korea