Petteri Kääpä
Partner And Senior Consultant at Black Belt Consulting
Helsinki, Finland
Summary
👤
Senior🎓
Top SchoolPetteri Kääpä is a seasoned software leader and consultant with 16 years of experience building backend systems and leading engineering teams from Helsinki. As Partner and Senior Consultant at Black Belt Consulting, and previously Tech Lead for Identity and Access Management at Utopia Music and CTO at Invesdor, he blends hands-on backend development with platform and infrastructure ownership. He is an active open-source contributor to the RailsAdmin project, where he refactored core configuration DSLs to improve field types, formatting and association handling—demonstrating deep familiarity with Rails internals. Comfortable switching between freelance, executive and technical roles, he also brings entrepreneurial experience running small businesses and a record label, which informs his pragmatic approach to product and business needs. Colleagues describe him as calm, effective and focused on delivering reliable, maintainable systems.
16 years of coding experience
22 years of employment as a software developer
High school diploma, High school diploma at Lahden Lyseon lukio
Github Skills (5)
activerecord10
rails10
object-oriented-programming10
ruby-on-rails10
ruby10
Programming languages (3)
Github contributions (5)
railsadminteam/rails_admin
Oct 2010 - Aug 2011
RailsAdmin is a Rails engine that provides an easy-to-use interface for managing your data
Role in this project:
Back-end Developer
Back-end DeveloperContributions:310 commits in 10 months
Contributions summary:Petteri primarily contributed to the RailsAdmin project by refactoring and enhancing the configuration DSL. They modified the core configuration aspects of the system, specifically those related to field types, data formatting, and associations (has_many, belongs_to, etc.). Their work included adding support for new features and improving existing ones, such as setting output formats for date and time data, enhancing list and edit views, and introducing new features for handling associations, demonstrating an in-depth understanding of the project's internal structure.
railsrails-enginerailsadminrubyactivemodel
invesdor/trusty-client-ruby
Feb 2017 - Jun 2017
Contributions:2 pushes in 4 months
ruby-clientrubytrustly
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