Seongjun Yun
Software Engineer
London, England, United Kingdom
Summary
👤
Senior🎓
Top SchoolSeongjun Yun is a senior software developer with 12 years of experience designing and operating high-performance, resilient distributed systems for global audiences. He has driven critical backend and edge-service work at AWS CloudFront and Prime Video, including low-latency C services, a Java-based safety mechanism to limit configuration blast radius, and tooling that shrank config deployment from hours to near-instant. Comfortable across C, Java and Python, he blends systems-level performance tuning with pragmatic automation—building incident analyzers, metrics libraries, and virtual cache layers that reduced costs and operational toil. At scale he focuses on reliability and observability, having both introduced telemetry utilities still used in production and reduced global log storage by 10%. Now based in London and currently at Global Relay, he pairs deep technical craft with a knack for turning risky global changes into safe, incremental rollouts. An early career background in web office and e-commerce platforms gives him a broad product-oriented perspective that complements his distributed-systems expertise.
12 years of coding experience
16 years of employment as a software developer
Master's Degree, Software Engineering, Master's Degree, Software Engineering at Sungkyunkwan University
Korean, English
Stackoverflow
29,068reputation
2.6mreached
275answers
34questions
lodash
top-1%
refresh
top-5%
oracle
top-5%
java
top-1%
postgresql
top-5%
java-time
top-5%
Github Skills (43)
javascript10
linux10
java10
ruby10
homebrew10
lodash10
sql10
postgresql9
groovy9
kotlin9
aggregate-functions9
java-time9
refresh9
emacs9
clojure9
Programming languages (6)
Github contributions (5)
ntalbs/dotfiles
Jan 2015 - Apr 2024
Contributions:225 pushes, 8 branches in 9 years 4 months
ntalbs/maze-js
Aug 2015 - Sep 2022
Contributions:65 commits, 40 pushes, 5 branches in 7 years 2 months
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