Junsub Kim
Software Engineer at Sendbird
Seoul, South Korea
Summary
👤
Senior🎓
Top SchoolJunsub Kim is a backend software engineer with 12+ years of hands-on experience building high-throughput, distributed systems primarily in Java and Python. He has designed and led messaging and API gateway platforms at scale—managing services that handled billions of messages and hundreds of millions of monthly users. At Sendbird he led development of an omnichannel notification service and global messaging infrastructure across 24 AWS regions, and earlier roles include building API gateways, ElasticSearch/ELK logging stacks, and blockchain API servers using Hyperledger. He contributes to Hyperledger Fabric and maintains personal open-source projects like Moon API Gateway and a Scala JSON parser, reflecting deep systems and integration expertise. Based in Seoul, he pairs pragmatic production engineering with open-source collaboration, often working at the intersection of messaging, observability, and infrastructure.
13 years of coding experience
8 years of employment as a software developer
Bachelor's degree Computer science, Bachelor's degree Computer science at Korea Aerospace University
Korean, English
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (21)
asynchronous10
java10
servlet10
api-gateway10
spring-boot10
jetty10
redis9
redis-py9
redis-client9
redis-cluster9
fabric9
python8
hyperledger8
blockchain8
planet7
Programming languages (4)
Github contributions (5)
longcoding/moon-api-gateway
Apr 2016 - Jul 2019
Asynchronous API Gateway with spring boot 2.1, servlet 4.0, jetty 9 client
Contributions:219 commits, 5 PRs, 39 pushes in 3 years 4 months
api-gatewayasynchronousjettyservletspring-boot
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