Rosa Escudero
Lead Programmer at 37signals
Madrid, Community of Madrid, Spain
Summary
🤩
Rockstar🎓
Top SchoolRosa Escudero is a Lead Programmer with 14 years of experience specializing in security, performance and infrastructure for web-scale Rails applications. Based in Madrid, she has led backend efforts at 37signals and previously shipped critical cloud-facing features at Plex and Tuenti, balancing reliability with practical engineering trade-offs. A strong Ruby on Rails practitioner, Rosa contributes to flagship open-source projects like rails/rails (notably Active Storage fixes and secure content-disposition handling) and has improved database proxying in instacart/makara through cookie-based stickiness refactors. Her background spans academia and industry—teaching computability and conducting research early in her career—bringing a rigorous theoretical foundation to production problems. Colleagues know her for blending deep technical curiosity in maths and theory of computation with a pragmatic focus on shipping secure, maintainable systems.
14 years of coding experience
9 years of employment as a software developer
M.Sc, Computer Science, M.Sc, Computer Science at University of SevilleM.Sc. programme, Computer Science, M.Sc. programme, Computer Science at Johannes Kepler Universität LinzSummer school, Summer school at Universitat d'AlacantM.Sc., Advanced Computing, M.Sc., Advanced Computing at Imperial College London
Spanish, English, German, French
Github Skills (19)
ruby-rails10
reverse-proxy10
mysql-proxy10
storage10
rails10
proxy10
ruby10
google-cloud-storage10
file-handling10
cookie10
proxysql10
application-framework9
security9
rspec9
app-framework9
Programming languages (7)
Github contributions (5)
instacart/makara
Feb 2018 - Feb 2018
A Read-Write Proxy for Connections; Also provides an ActiveRecord adapter.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:1 review, 31 commits, 4 PRs in 17 days
Contributions summary:Rosa focused on refactoring and improving the `Makara` library, a read-write proxy for database connections. Their contributions centered on modifying the context management for stickiness, replacing previous methods with a cookie-based approach. Key changes include implementing context persistence using cookies, clearing expired stickiness entries, and adapting the proxy to utilize the new context implementation. These changes aimed to simplify and enhance the management of database connection stickiness.
proxyread-writerailsrubyadapter
rails/rails
Aug 2017 - Jan 2020
Ruby on Rails
Role in this project:Back-end Developer
Back-end DeveloperContributions:2 reviews, 10 commits, 15 PRs in 2 years 4 months
Contributions summary:Rosa's contributions primarily involve enhancements and bug fixes within the Active Storage component of Ruby on Rails. They addressed issues related to file handling in Google Cloud Storage, specifically handling errors when files are already deleted. The user also implemented features to control content disposition, ensuring specific content types are served as attachments and enhancing security. Further contributions include allowing overriding filenames in service URLs and preventing content type and disposition bypasses.
ruby-on-railsrailsframeworkrubymvc
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