John Sumsion
Principal Software Engineer at FamilySearch
Spanish Fork, Utah, United States
Summary
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SeniorJohn Sumsion is a Principal Software Engineer with 16+ years of experience turning ideas into performant, maintainable systems, currently leading engineering at FamilySearch. He brings deep expertise in multi-threaded Java, kernel development, and designing lean, fast APIs, complemented by production work with Ruby, Linux, Cassandra, Spring, Hibernate and C. Known for delivering high-quality software under tight deadlines, he focuses on harnessing team strengths and iterating pragmatically to meet real-world constraints. His background spans product and systems roles since the mid-1990s, giving him a rare blend of low-level systems insight and API-driven application architecture. Based in Spanish Fork, Utah, he pairs a pragmatic engineering mindset with a knack for tuning systems to return just the right amount of data at minimal latency.
17 years of coding experience
21 years of employment as a software developer
German
Stackoverflow
15,011reputation
2.2mreached
11answers
0questions
git
top-1%
Github Skills (45)
git10
gedcom9
java9
color-scheme9
git-workflow9
conemu9
amazon9
ssh-agent9
powershell9
shell8
cmder8
command-line8
aws8
windows8
serialization8
Programming languages (8)
Github contributions (5)
jdsumsion/git-ged
Dec 2011 - Feb 2013
Contributions:101 commits in 1 year 2 months
jdsumsion/famcraft-dev
May 2018 - May 2020
A minecraft plugin that leads players on a virtual scavenger hunt, learning more about their ancestors. NOTE: this is a dev repo with server & world(s)
Contributions:6 PRs, 5 pushes, 9 branches in 2 years
minecraft
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