Marcin Grzywaczewski
Technical Quality Lead at Callstack
Wrocław, Lower Silesian Voivodeship, Poland
Summary
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Rockstar🎓
Top SchoolMarcin Grzywaczewski is a Technical Quality Lead with 13 years of experience building and architecting web and data-driven systems, currently leading quality initiatives at Callstack. He combines deep front-end expertise in Ruby and JavaScript with production machine learning and data engineering experience from roles where he deployed expert systems and automated ML pipelines. A T-shaped engineer, Marcin pairs practical consulting and team leadership with academic interests in systems programming, computer graphics, photogrammetry and the theory of programming languages. He has broad polyglot experience—from Haskell and OCaml to Rust and scientific Python—and is a long-time educator who has written two books and run workshops to upskill junior developers. Colleagues know him as a pragmatic architect who moves prototypes (including IPYNB-based experiments) into robust cloud deployments while advocating for Rust as the future of systems programming.
13 years of coding experience
12 years of employment as a software developer
Bachelor's degree Computer Science, Bachelor's degree Computer Science at University of Wroclaw
Polish, English
Github Skills (54)
javascript10
react-native10
rich-text10
testing10
typescript10
hotwire10
ruby10
hotwire-rails10
ddd10
ruby-on-rails10
react10
domain-driven-design10
event-sourcing9
cqrs9
eventstore9
Programming languages (8)
Github contributions (5)
arkency/arkency-ios
Oct 2014 - Oct 2014
Contributions:42 commits in 23 days
arkency/scaffold-to-react
Jun 2015 - Mar 2016
Step by step scaffold to React, using server-side rendering and react-rails
Contributions:45 commits, 6 pushes, 1 branch in 9 months
reactreact-railsserver-side-rendering
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