Cees De Groot
Principal Software Engineer at CalmWave
Chatsworth, Ontario, Canada
Summary
🤩
Rockstar🎓
Top SchoolCees De Groot is a Principal Software Engineer with 25+ years of hands-on experience modernizing engineering organizations and shipping distributed systems. He’s known for driving agile adoption and pragmatic architecture shifts—introducing Elixir and Kafka-based async architectures and championing a “monostack” approach to reduce cognitive load for teams. Cees has scaled engineering from small teams to hundreds at companies like PagerDuty and led end-to-end SaaS builds using Elixir/Phoenix, CQRS/ES and simple, reliable CI/CD on AWS. A self-described yak shaver and cranky old guy, he pairs deep technical curiosity with a bias for getting things done, often tackling the “mission impossible” projects others avoid. He also brings uncommon experience from founding and CTO roles in early web businesses and open-source governance, which informs his blend of product-minded engineering and operational rigor. Based in Chatsworth, Ontario, he stays current on emerging tech—Elixir, Kafka, and cloud patterns—evaluating them strictly for business benefit.
14 years of coding experience
33 years of employment as a software developer
VWO, VWO at CSG Westland-ZuidBusiness Administration, Business Administration at Nyenrode Business University
English, Dutch, German, French, Spanish
Stackoverflow
1,785reputation
112kreached
47answers
0questions
playframework
top-5%
Github Skills (200)
vim10
language-server-protocol10
cqrs10
melpa10
emacs-lsp10
emacs-lisp10
umbrella10
emacs10
ecto10
eventstore10
adapter10
ide10
commanded10
language-server10
spacemacs10
Programming languages (25)
Github contributions (5)
cdegroot/uderzo_poncho
May 2018 - Sep 2020
Poncho-style project for Uderzo graphics for Elixir
Contributions:57 commits, 8 PRs, 92 pushes in 2 years 4 months
elixirgraphics
cdegroot/palapa
Apr 2017 - Mar 2020
My Elixir code, in one huge umbrella
Contributions:194 commits, 2 PRs, 252 pushes in 2 years 11 months
umbrellaelixirash
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