Martin Koster
Novice at Bigger Boat
Leidschendam, South Holland, Netherlands
Summary
👤
Senior🎓
Top SchoolMartin Koster is a veteran full-stack software engineer with over 25 years building software and more than a decade of hands-on experience in modern web stacks, combining Java backends and rich JavaScript frontends like React and Angular. He has delivered mission-critical projects for enterprise clients including Nike, ING, KLM and government agencies, often bridging legacy systems to containerized, CI/CD-driven platforms. Comfortable as a freelancer and team lead, he excels at translating complex business KPIs into usable dashboards and interactive data tools. Based in Leidschendam, Netherlands, he pairs deep Java expertise with practical front-end craftsmanship and a knack for hitting the ground running on long-running projects he previously helped create. An investor and occasional technical owner, he brings both product-minded thinking and pragmatic engineering to every engagement.
11 years of coding experience
24 years of employment as a software developer
Matriculation, Matriculation at Pretoria Boys' High SchoolUniversity of South Africa
German, English, Dutch, Afrikaans
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (18)
mutation-testing9
angularjs8
javascript8
pair-programming7
state-machine7
command-line7
cli7
mutation7
router6
testing6
openai5
typescript5
chatgpt5
gemini4
llama4
Programming languages (5)
Github contributions (5)
paysdoc/js-mutation-testing
May 2015 - Apr 2016
Contributions:64 commits, 1 PR, 47 pushes in 10 months
testingjavascriptmutationmutation-test
paysdoc/Millennium-admin
Nov 2025 - Feb 2026
Contributions:6 reviews, 52 PRs, 85 pushes in 3 months
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