Hello! My name is Daehong Jeon
I'm Software Engineer / Data Engineer.
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💻 Spark & Iceberg-based Large-Scale Data Pipeline Engineer
- Extensive experience in the finance and e-commerce domains, covering everything from Hadoop to modern cloud platforms. Skilled in processing tens to hundreds of terabytes of data, developing Spark & cloud-based ETL pipelines, optimizing Hadoop legacy systems, and designing highly available, failover-ready, and concurrency-controlled data infrastructures.
🌐 I love contributing to open source
- Active contributor and maintainer for data engineering projects such as Apache Iceberg and Apache Kafka, including issue triage, PR reviews, and documentation improvements.
- Open Source Mentoring (2025.05~) — Engaged in fostering a healthy and sustainable open source culture in Korea.
🎯 My Goals
- To grow as a technology leader who internalizes and spreads the latest trends within organizations,
while designing and operating scalable and reliable architectures for large-scale, high-traffic environments.
| project | summary | Type | link | date |
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Fixed Markdown rendering in Row-level Deletes section (bullets, duplicates, line breaks). | Docs | PR | 25.09 |
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Added missing super.validate() call in OAuth2TokenResponse.validate(). |
Bug Fix, Improvement | PR | 25.09 |
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Fixed incorrect field assignments in TestModelMetaService tests. |
Bug Fix, Test | PR | 25.08 |
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Added docs for Table Maintenance in Flink (file compaction, orphan removal, snapshot expiration). | Docs | PR | 25.08 |
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Fixed early return in GroupMetaService.updateGroup that ignored non-role updates. |
Bug Fix, Test | PR | 25.08 |
Show More My OpenSource PR ...
| project | summary | Type | link | date |
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Fixed NullPointerException in EntityCombinedFileset with null-safe hiddenProperties. |
Bug Fix, Test | PR | 25.08 |
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Fixed null-safe handling of managed property in CreateFileset.java. |
Bug Fix, Test | PR | 25.08 |
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Added request.validate() in PartitionOperations.java for proper error handling. |
Improvement | PR | 25.08 |
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Migrated Flink catalog tests from JUnit4 to JUnit5. | Improvement(Core) | PR | 25.05 |
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Backported JUnit5 migration to Iceberg 1.19 and 1.20. | Improvement(Core) | PR | 25.05 |
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Updated test code and docs for Kafka retry topic template bean name. | Improvement, Docs | PR | 24.10 |
✏️ Certified Information Processing Engineer (2023.11)
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✏️ Linux Master (2025.01)
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