Backend Developer
• Performance: 92% speedup in orders (60s → 3s) • Latency: Optimized API from 42s to 20ms • Efficiency: Slashed test cycles by 90%
Stack: Java · Kotlin · Spring Boot · NodeJS · Python · Django Infra: MySQL · MongoDB · Redis · Docker · AWS
I am available for enhancing system reliability and development workflows. I specialize in streamlining deployment processes—having reduced test execution time from minutes to seconds—and establishing standardized code practices. I am committed to creating environments where teams can deliver high-quality software faster and more reliably.
Jan 7 · 4 min read · In Spring Boot, HikariCP has been the default connection pool since version 2.0. As a backend developer, understanding "why" we use it and how to tune it for production is crucial for building scalable systems. The Spring documentation explicitly sta...
Join discussionJan 7 · 5 min read · try { objectMapper.readValue(request, A::class.java) } catch (e: JsonProcessingException) { throw CoreException(InMemoryExceptionCode.FAILED_PARSE_JSON) } catch (e: JsonMappingException) { throw CoreException(InMemoryExceptionCode.FAILED_...
Join discussionJan 7 · 6 min read · JVM threads are mapped directly to OS threads. This is known as the Native Thread Implementation or the 1:1 Threading Model. Thread Pool in Spring Boot By default, Spring Boot creates a thread pool when using an embedded Tomcat server. The defau...
Join discussionJan 7 · 3 min read · My First Encounter with Test Code When I first joined my previous company, I found that despite being a solution provider, there wasn't a properly established core solution. We had one product delivered to a client, but the codebase—likely due to a ...
Join discussionJan 7 · 2 min read · The Issue I discovered a bug where the dates in the user activity stream tab—which summarizes the last three days of activity—were stuck at the exact time the Docker container was started. Troubleshooting Attempt 1: Syncing Container Time with Loca...
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