Elger Jonker
Netherlands
Summary
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RockstarElger Jonker is an independent Python web developer and security specialist with a decade of experience delivering web applications, running web security tests, and teaching security trainings. He founded the Internet Cleanup Foundation to scale sector- and country-level web security improvements—shipping projects like Basisbeveiliging.nl—and continues to consult through John Kr. His background includes a security architect role at Centric and leadership in organizing major hacker camps (SHA2017, MCH2021), reflecting a blend of practical engineering and community-driven security advocacy. Based in Arnhem, he combines hands-on development with programmatic approaches to raise baseline internet safety across organizations.
10 years of coding experience
Github Skills (200)
content-security-policy10
tld10
api10
task-scheduler10
dkim10
frontend10
python10
spf10
progressive10
starttls10
task-queue10
recursive10
rfc10
distributed-lock10
bind10
Programming languages (17)
Github contributions (5)
internetstandards/Internet.nl-dashboard-frontend
Nov 2020 - Nov 2022
Contributions:7 releases, 178 commits, 125 PRs in 2 years 1 month
minvws/nl-covid19-coronacheck-backend-bizrules-signing-service
Apr 2021 - Jun 2021
Signing service for DCC and Domestic Certs
Contributions:365 commits in 2 months
securitydcccertssigning
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