RicardoΒ Kreyhsig
Senior Software Engineer at GitHub
Washington, District of Columbia, United States
Summary
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Top SchoolRicardo Kreyhsig is a senior backend engineer with 11+ years delivering robust web applications and APIs, currently at GitHub after recent roles improving tax and healthcare platforms. He specializes in Ruby on Rails, JavaScript/React, GraphQL, and AWS, and has a track record of turning manual processes into automated, scalable systems that reduced toil and unlocked revenue. Ricardo led architecture and SRE efforts that cut job failures and on-call load, and shipped large EHR and tax-filing migrations used by thousands of users. He pairs hands-on development with mentoring and knowledge-sharing, routinely onboarding engineers through pair programming and tech talks. Notably, his work on government-subsidized tax tools directly helped hundreds of thousands of filers and secured millions in refunds, reflecting an ability to build software with measurable social impact. Based in Washington, D.C., he blends practical performance optimization and production incident leadership with a strong foundation in engineering and DevOps practices.
11 years of coding experience
11 years of employment as a software developer
Bachelor of Science - BS Computer Engineering, Bachelor of Science - BS Computer Engineering at University of Maryland - A. James Clark School of EngineeringAssociate of Arts (A.A.) Computer Science, Associate of Arts (A.A.) Computer Science at Montgomery College
Portuguese, English, Spanish
Github Skills (21)
pnpm10
logic10
rubygems9
javascript9
dependabot9
dotnet9
terraform9
code-security9
java9
elm9
ruby9
python9
elixir9
docker9
php9
Programming languages (5)
Github contributions (5)
rickreyhsig/toy_app
Feb 2015 - Apr 2025
A toy demo app for the Ruby on Rails Tutorial
Contributions:5 reviews, 4 PRs, 5 pushes in 10 years 3 months
rickreyhsig/pandera
Aug 2016 - Dec 2024
Landscaping company billing system
Contributions:2 reviews, 13 PRs, 764 pushes in 8 years 5 months
billing
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