Joni Katajamäki
Partner, Senior Consultant at Luoto Company
Espoo, Finland
Summary
🤩
Rockstar🎓
Top SchoolJoni Katajamäki is a Partner and Senior Consultant based in Espoo, Finland, with 14 years of software engineering experience focused on delivering pragmatic, maintainable systems. He has led and contributed to consultancy and product work at Wunderdog and now runs client engagements through Luoto Company, blending technical execution with strategic guidance. Deeply familiar with reactive patterns, he made notable open-source contributions to the MobX Dart library—refactoring core internals, removing dart:mirrors, adding linter rules and tests—to improve state management for Flutter apps. Joni’s background in software engineering from Jyväskylä’s universities and long tenure in senior roles reflect a hands-on approach to code quality, architecture and developer tooling. Colleagues value his ability to translate complex implementation details into reliable designs that scale across teams. He combines consultancy-level stakeholder communication with a developer’s attention to abstraction and testing.
13 years of coding experience
6 years of employment as a software developer
Software Engineering, Information Technology, Software Engineering, Information Technology at Jyväskylän Ammattikorkeakoulu
Github Skills (8)
state-management10
dart10
reactive-programming10
mobx10
flutter-apps9
testing9
flutter9
flutter-game9
Programming languages (10)
Github contributions (5)
mobxjs/mobx.dart
Jan 2019 - Feb 2019
MobX for the Dart language. Hassle-free, reactive state-management for your Dart and Flutter apps.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:105 commits, 49 PRs, 106 pushes in 1 month
Contributions summary:Joni primarily contributed to refactoring and improving the MobX Dart library's core functionality. Their work involved removing usage of `dart:mirrors` and migrating to newer methods. This user implemented several linter rules and refactored various classes, including those related to reactions, actions, and observables. They also introduced the injection of `ReactiveContext` as a constructor argument and added tests for computed values, actions, and the context in general.
state-managementflutter-appsdart-languagemobxdart
wunderdogsw/proem
Oct 2018 - Feb 2020
Contributions:3 releases, 60 PRs, 121 pushes in 1 year 3 months
typescriptpromotedlernastandard-library
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