Samuel Caballero
Staff Software Engineer at Affirm
Salamanca, Castile and León, Spain
Summary
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Rockstar🎓
Top SchoolSamuel Caballero is a Staff Software Engineer with nine years of hands-on experience building and modernizing backend systems, primarily with Ruby on Rails. He has led teams through complex architectural work—extracting billing from a monolith with Kafka and GraphQL, modularizing large codebases with Packwerk, and integrating third-party systems like HubSpot and payment providers. Known for reducing technical debt and promoting engineering best practices, he also builds tooling to improve developer workflows (for example automating TODO tracking tied to Jira). Based in Salamanca, Spain, Samuel combines startup grit from co-founding ventures with scale-oriented experience at Toptal and Affirm, making him effective at both greenfield products and large migrations.
9 years of coding experience
17 years of employment as a software developer
Técnico Superior en Desarrollo de Aplicaciones Informáticas Programación, Técnico Superior en Desarrollo de Aplicaciones Informáticas Programación at IES Venancio BlancoCertificado de Aptitud Pedagógica, Certificado de Aptitud Pedagógica at Universidad Pontificia de Salamanca
English, Spanish
Stackoverflow
181reputation
31kreached
5answers
0questions
Github Skills (32)
accessibility10
reader10
firefox-addon10
chrome-extension10
browser-extension9
firefox9
darkmode9
chrome9
initialization6
activerecord6
filter6
ruby-on-rails6
activeadmin6
scopes6
globalization6
Programming languages (2)
Github contributions (5)
svegaca/adjust
Jan 2017 - Jan 2017
Contributions:3 pushes, 3 branches in 1 day
apiadjustrubyapi-wrapper
svegaca/bicycle_shop
Feb 2025 - Feb 2025
Contributions:1 push, 1 branch in 1 day
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