Christian Semmler
Senior Software Engineer at Apple
Greater Sacramento United States
Summary
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RockstarChristian Semmler is a Senior Software Engineer with 15+ years of experience who blends hands-on engineering with entrepreneurial leadership, most recently joining Apple after a long run co-founding and scaling dyve GmbH’s technology and US operations. He has deep experience delivering complex web systems for ad tech and startups, leading account management and product delivery while moving between contractor and full-time roles at major tech firms. Based in Greater Sacramento, he pairs Ruby on Rails expertise with a pragmatic, product-focused approach to building reliable back-end services. An operator at heart, he has repeatedly transitioned from founding teams to enterprise environments, showing an uncommon ability to translate startup agility into large-scale engineering practices.
16 years of coding experience
13 years of employment as a software developer
Github Skills (96)
sdl10
xmlrpc10
decompilation10
sidekiq-pro10
ruby-wrapper10
rapidjson10
vorbis10
mp310
wav10
wasapi10
baking10
multiplayer10
rails-i18n10
audio-playback10
decoding10
Programming languages (9)
Github contributions (5)
foxtacles/isle
Jun 2023 - Jul 2026
A work-in-progress decompilation of LEGO Island (1997)
Contributions:2 reviews, 5 PRs, 1986 pushes in 3 years 1 month
decompilation
foxtacles/rj_schema
Feb 2018 - Sep 2021
Fast JSON schema validation with RapidJSON in Ruby
Contributions:1 review, 64 commits, 21 PRs in 3 years 7 months
json-schemarapidjsonruby
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