Jack Sierkstra
IT Manager at Gam Bakker B.V.
North Holland, Netherlands
Summary
👤
Senior🎓
Top SchoolJack Sierkstra is an IT manager and former software engineer with 13 years of experience modernizing legacy systems into cloud-native, high-concurrency architectures. He blends hands-on engineering (Android, Java, .NET, microservices) with people-oriented project management and a pragmatic focus on maintainability and communication. His career spans consultancy and in-house roles at banks, pension and public transport platforms, where he introduced practices like ATDD and helped accelerate delivery through microservices. Now leading IT and projects at GAM Bakker, he retains a tinkerer’s curiosity—on and off the court—bringing honesty, collaboration, and a preference for clear, practical solutions to complex technical challenges.
13 years of coding experience
7 years of employment as a software developer
Bachelor's degree, Computer Science, Bachelor's degree, Computer Science at Hogeschool van AmsterdamApplicatieontwikkeling, Computer Software Engineering, Applicatieontwikkeling, Computer Software Engineering at Horizon College
English, Dutch
Stackoverflow
1reputation
2kreached
0answers
1question
Github Skills (68)
maven-plugin10
docker-registry10
maven10
gradle-plugin10
browser10
gradle10
nextjs10
react10
javascript9
compiler9
jib9
hybrid9
docker9
static-site-generator9
java9
Programming languages (5)
Github contributions (5)
jacksierkstra/Picasso
Feb 2014 - Apr 2016
Contributions:8 commits, 3 PRs, 3 pushes in 2 years 2 months
picassoandroidxamarinxamarin-formsjava-bindings
jacksierkstra/checkr
Feb 2025 - Mar 2025
A pure validation library.
Contributions:29 releases, 25 PRs, 74 pushes in 20 days
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