Ingyu Hwang
Engineering Manager - Search Platform
Seoul, South Korea
Summary
🤩
Rockstar🎓
Top SchoolIngyu Hwang is an engineering manager based in Seoul with a decade of experience building scalable back-end systems, currently leading search platform and feed infrastructure teams at 당근. He progressed from developing home feed and favorites features to managing platform-level reliability and observability for large-scale user-facing systems. A pragmatic hands-on leader, he has contributed to prominent open-source Java projects like Resilience4j and Spring Cloud Gateway—improving circuit breaker/time limiter robustness and enhancing gateway metrics and tags for better observability. His background includes building LINE Timeline back-end services, giving him deep expertise in social/feed systems and real-time data flows. Colleagues rely on him to translate complex distributed-system problems into maintainable engineering roadmaps while still shipping critical bug fixes and metric improvements himself. He brings a blend of production-first engineering, open-source craftsmanship, and platform leadership to drive dependable search and feed experiences.
10 years of coding experience
4 years of employment as a software developer
성균관대학교
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (14)
javas10
spring-cloud10
api-gateway10
reactor10
java10
metric10
spring-boot10
testing9
prometheus9
microservices8
microservices-application8
bulkhead8
retrying8
micrometer8
Programming languages (8)
Github contributions (5)
resilience4j/resilience4j
Jun 2019 - Feb 2021
Resilience4j is a fault tolerance library designed for Java8 and functional programming
Role in this project:
Back-end Developer
Back-end DeveloperContributions:22 reviews, 41 commits, 37 PRs in 1 year 9 months
Contributions summary:Ingyu primarily contributed to the resilience4j library by fixing typos in documentation and addressing issues related to Spring Boot health indicators and Spring Cloud modules. They also improved the Prometheus metrics publisher, added slow call count metrics, and removed a dependency. Furthermore, the user addressed bugs in the circuit breaker and time limiter components.
uidfunctional-programmingtolerancefaultrate-limiter
spring-cloud/spring-cloud-gateway
Jun 2019 - Oct 2021
An API Gateway built on Spring Framework and Spring Boot providing routing and more.
Role in this project:Back-end Developer
Back-end DeveloperContributions:2 reviews, 11 commits, 11 PRs in 2 years 4 months
Contributions summary:Ingyu primarily focused on enhancing the metrics capabilities of the Spring Cloud Gateway. Their contributions included adding a `GatewayTagsProvider` interface for customizing metrics tags, refactoring the `GatewayMetricsFilter` to utilize a composite provider, and introducing a `PropertiesTagsProvider` for static tags. The changes involved modifying core gateway components to support more flexible and configurable metrics gathering, improving the observability of the API gateway. They also implemented changes to handle cases of resume without error in CircuitBreakerFilter.
api-gatewayspring-bootspring-frameworkproxyreactor
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