Brenno Costa
Senior Software Engineer at Gigs
Berlin, Germany
Summary
👤
Senior🎓
Top SchoolBrenno Costa is a senior software engineer with 14+ years building scalable backend systems across fintech, e-commerce, real estate and media, now based in Berlin. He combines deep hands-on expertise in APIs, event-driven architectures and CI/CD with a track record of enabling teams to ship faster and more reliably—driving daily deployments, cutting CI times, and improving developer experience metrics. At companies like Klarna and OneFootball he scaled services for millions of users and led migrations from monoliths to microservices and event buses, while preserving reliability during peak traffic. An active open-source contributor in the Ruby ecosystem, he improved database configuration and developer tooling for well-known projects such as Hanami and ActiveAdmin. Brenno is as focused on engineering culture as on code—advocating trunk-based development, VCS-as-documentation, and pragmatic processes that balance speed and long-term code health. Outside production systems he approaches software as continuous study, bringing a disciplined, mentorship-first mindset to complex platform work.
14 years of coding experience
16 years of employment as a software developer
Federal University of Rio Grande do NorteWeb Development Technologist, Computer Software Engineering, Web Development Technologist, Computer Software Engineering at IT Cursos
Portuguese, English
Stackoverflow
172reputation
19kreached
2answers
1question
Github Skills (29)
ruby-rails10
database-connection10
rspec10
databases10
server-configuration10
rails10
ruby10
hanami10
activeadmin10
sql10
database10
i18n-node9
testing9
web-application9
translation9
Programming languages (14)
Github contributions (5)
hanami/hanami
Jul 2015 - Oct 2015
A flexible framework for maintainable Ruby apps
Role in this project:
Back-end Developer
Back-end DeveloperContributions:11 commits, 4 PRs, 31 comments in 2 months
Contributions summary:Brenno primarily focused on improving the Hanami framework's database configuration and generator functionality. They refactored database configuration logic, added support for multiple database engines (MySQL, PostgreSQL, SQLite), and ensured proper URL generation. Furthermore, the user addressed issues related to testing, including test reliability and improved the command-line interface (CLI) functionality for database-related tasks, enhancing the overall developer experience.
apijavascriptweb-applicationrubyhanami
activeadmin/activeadmin
Oct 2013 - Nov 2013
The administration framework for Ruby on Rails applications.
Role in this project:Back-end Developer
Back-end DeveloperContributions:8 commits, 8 comments in 1 month
Contributions summary:Brenno primarily contributed to the Active Admin framework by addressing bugs and improving the component's functionality. Their work focused on fixing translation issues within the attributes_table component and removing deprecated resources. Furthermore, they enhanced the Active Admin comments functionality, including adding translations for 'Anonymous' authors and improving related spec styles. Several commits also focus on improving the Active Admin Comments by correctly handling polymorphic relationships through STI.
ruby-on-railsrails-applicationsrailsadministrationarbre
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