João Moura
Founder at crewAIInc
San Fracsico, CA, USA, Brazil
Summary
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RockstarJoão Moura is a founder and seasoned software engineer with 14 years of experience building backend systems and startups from São Paulo. Currently leading crewAI after a stint at Clearbit (acquired by HubSpot), he blends product-driven entrepreneurship with deep technical ownership. His open-source contributions to the Rails ecosystem—particularly refactoring caching and adapter structures in active_model_serializers—showcase practical expertise in performance and serialization at scale. João is comfortable shipping core infrastructure improvements as well as leading teams to turn data-rich problems into reliable services. He brings a pragmatic, test-driven approach and an eye for subtle efficiency gains that often unlock measurable product improvements.
15 years of coding experience
Github Skills (6)
activemodelserializers10
json10
caching10
serializer10
ruby10
testing9
Programming languages (12)
Github contributions (5)
rails-api/active_model_serializers
Oct 2014 - Oct 2015
ActiveModel::Serializer implementation and Rails hooks
Role in this project:
Back-end Developer
Back-end DeveloperContributions:1 release, 119 commits, 116 PRs in 1 year
Contributions summary:João primarily contributed to the implementation of caching mechanisms within the `active_model_serializers` project. Their work involved refactoring the caching implementation, introducing features such as cache keys, options, and fragment caching to improve the efficiency of serializations. They added and modified tests to ensure the correct behavior of the caching features, as well as fixing issues with array serialization. The user was heavily involved in refactoring the underlying adapter structure.
railsrubyjsonresource-serializer
joaomdmoura/sigma
May 2013 - Aug 2013
Contributions:93 commits in 3 months
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