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.
15 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)
postgresql10
language-server-protocol10
vim10
spacemacs10
cqrs10
linux10
emacs10
ecto10
database10
eventstore10
erlang10
elixir10
kafka10
event-sourcing10
event-handler10
Programming languages (27)
Github contributions (5)
cdegroot/evrl
Oct 2014 - Apr 2022
evrl.com site using gollum
Contributions:64 commits, 3 PRs, 77 pushes in 7 years 6 months
gollumtraitsmanual
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
elixirgraphic
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