Andrew Callahan
Staff Software Engineer at Procore Technologies
Austin, Texas, United States
Summary
🤩
Rockstar🎓
Top SchoolAndrew Callahan is a Staff Software Engineer in Austin with 13 years of experience building APIs, authentication systems, and scalable backend services. He currently drives architecture and delivery at Procore Technologies after senior engineering roles at DockYard and LiftForward, where he built enterprise HaaS platforms, integrated numerous external services, and improved conversion through analytics. Comfortable across Ruby on Rails, Elixir contributions, and frontend stacks, he has shipped isomorphic React apps, Rails APIs, and production message-driven systems using RabbitMQ and Postgres. An active open-source contributor, he improved documentation and core modules for the Ash Elixir framework, demonstrating attention to developer experience and clarity. He pairs hands-on coding with mentoring and cross-functional collaboration, having led product and engineering teams as a founder and manager. Known for translating complex integrations into pragmatic, testable systems, he brings both product-minded judgment and deep technical craft to engineering problems.
12 years of coding experience
12 years of employment as a software developer
Flatiron SchoolGraduate Certificate, Business, Graduate Certificate, Business at Columbia UniversityBA, Economics, Political Science, BA, Economics, Political Science at The University of Connecticut
English
Stackoverflow
11reputation
2kreached
0answers
1question
Github Skills (8)
application-framework10
ash10
app-framework10
web-framework10
elixir10
documentation10
dsl10
ruby-on-rails6
Programming languages (7)
Github contributions (5)
ash-project/ash
Oct 2019 - May 2020
A declarative, extensible framework for building Elixir applications.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:18 commits, 4 PRs, 20 pushes in 7 months
Contributions summary:Andrew primarily focused on enhancing the documentation and structure of the Ash resource framework. Their contributions include updating the main resource documentation, improving documentation for the ETS data layer, and refining the general language used within the project. They made several adjustments to the code in the `Ash.Resource` module, as well as making changes in the `Ash.DataLayer.Ets` module. These changes show a dedication to better explain and organize the project's capabilities.
dsldeclarativeelixirframeworkextensible
andrewcallahan/url-shortener
Feb 2014 - Feb 2014
Contributions:26 commits in 5 days
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