Taek Kim - CTO at LINE Pay (Thailand)

Taek Kim

CTO at LINE Pay (Thailand)

Seoul, South Korea

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Summary

🤩

Rockstar

🎓

Top School

Taek Kim is a seasoned technology leader and CTO with 17 years of experience building high-scale distributed systems and leading engineering organizations across startups and major tech firms like Amazon and LINE. He has a proven track record of modernizing legacy systems, cutting infrastructure costs (up to 75%), and shipping core product features while fostering engineering culture and developer productivity. Deeply technical, Taek has driven architecture for large real-time services (LINE OpenChat) and contributed to the Armeria microservice framework by improving observability and developer UX. He combines hands-on backend expertise with strategic business alignment—translating revenue and profitability goals into technical roadmaps and rapid operational improvements. Based in Seoul, he pairs academic training from Columbia and Yonsei with pragmatic, metrics-driven leadership that scales teams and systems.

17 years of coding experience

17 years of employment as a software developer

MS Computer Science, MS Computer Science at Columbia University

BS Computer Science and Industrial System Engineering, BS Computer Science and Industrial System Engineering at Yonsei University

Github Skills (18)

http10

microservices-application10

java10

javas10

microservices10

grpc10

metric10

apidoc9

rpc9

api9

http-server9

http-client9

thrift8

javascript7

html7

Programming languages (1)

Java

Github contributions (5)

line/armeria

Apr 2016 - Sep 2016

Your go-to microservice framework for any situation, from the creator of Netty et al. You can build any type of microservice leveraging your favorite technologies, including gRPC, Thrift, Kotlin, Retrofit, Reactive Streams, Spring Boot and Dropwizard.

Role in this project:

Back-end Developer

Contributions:12 commits, 10 PRs, 8 pushes in 4 months

Contributions summary:Taek focused on enhancing the Armeria framework's monitoring capabilities by implementing metrics for tracking API request processing. They added methods to record request starts and completions within the `MetricConsumer` interface and integrated them into the `MetricCollectingServiceCodec` to capture metrics at different stages of request handling. Furthermore, they updated the documentation server, enabling the addition of HTTP headers for debugging and improving the user interface by hiding the HTTP headers section by default and using one query parameter for request details. The user made sampleHttpHeaders settable by services to extend the documentation and improve developer experience.

rpcmicro-frameworkretrofitprotobuftype-of

taicki/t-conf

Aug 2008 - May 2013

Contributions:97 commits in 4 years 8 months

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