Injun Song
Senior Lead Software Engineer at KAKAO (IWILAB)
Gyeonggi, South Korea
Summary
🤩
Rockstar🎓
Top SchoolInjun Song is a Senior Lead Software Engineer with 11 years of experience building large-scale distributed systems, distributed databases, and data infrastructure across major Korean tech firms. He currently leads Varlog, a scalable replicated state machine for transaction logs at KAKAO IWILAB, and previously architected distributed transaction management for SAP VORA and high-throughput data platforms at KAKAO. Proficient in C/C++, Go, Scala, and Python, he has delivered performance-focused improvements such as replacing REST RPC with gRPC and integrating RocksDB backends to support replication. His work spans real-time analytics, recommender systems that tripled conversion rates for SK Telecom’s OTT services, and production ML pipelines using Spark and TensorFlow. Based in Gyeonggi, South Korea, he combines deep systems engineering with a track record of turning research-grade designs into high-volume production services.
11 years of coding experience
14 years of employment as a software developer
B.S., Computer Science, B.S., Computer Science at Korea University
English, Korean
Stackoverflow
101reputation
3kreached
6answers
0questions
Github Skills (97)
actor-framework10
go-api10
high-availability10
windows10
opentelemetry10
cloud-native10
actor-model10
concurrency10
streaming10
reactive10
akka10
paxos10
api10
sdk10
akka-streams10
Programming languages (6)
Github contributions (5)
ijsong/dotfiles
Sep 2015 - Sep 2021
Contributions:102 pushes, 1 branch in 6 years 1 month
kakao/varlog
Apr 2020 - Jan 2023
Scalable distributed log storage for strong consistency, total order, and high availability
Contributions:37 releases, 489 reviews, 833 commits in 2 years 9 months
scalabletotalavailabilitydistributed-logpaxos
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