Geertjan Wielenga
@GeertjanW
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Senior Director of Open Source Projects @AzulSystems @foojayio (https://t.co/YzSx31nwjo), Amsterdam Java User Group, @TheASF @NetBeans PMC Chair, and @Java_Champions.
Amsterdam, the Netherlands
Joined February 2009
Incredibly inspiring #devonk launch today in Amsterdam, @JazieAnthony and many others, vibrant enthusiastic activist community being built up here, hard to get in, from young to old, bundling our local activism.
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RT @AmsterdamJug: Thanks @picnic and @Sander_Mak for the super packed out #AmsterdamJUG meetup featuring @iamsoham @rick_ossies @graalvm @R…
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RT @jonatan_ivanov: I'm presenting on Observability at @devnexus in early March. It's one of the the best Java conference in the USA and yo…
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RT @foojayio: On Foojay, @spoole167 discusses creating #Java (and beyond) tests that are as simple, fast, and as easy to run as feasible, w…
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RT @foojayio: Check out Cees Bos @OpenValue on challenging yourself with Application #Observability Code Challenges!
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RT @allmycode: Two of my books are being published this month. "Java, 9th Ed." ( and "Internet of Things" with Mike…
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RT @InnoVirtuoso: 🚀 Level up your dev game! David Farley's "Modern Software Engineering" is the ultimate guide to building reliable, scalab…
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RT @eliasnogueira: Looking for upcoming Java conferences in 2025? 🗓️ Stay updated and plan your learning journey with this comprehensive…
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RT @KoTurk77: An evening at the @AmsterdamJug at @doctolib is like..... Thanks for the awesome talks about #gatling, #java pattern matching…
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RT @AmsterdamJug: Excellent #AmsterdamJUG Meetup @DoctoTechLife with @mijosephr Rijo Sam @ABNAMRO @BalaRawool @ingnl!
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RT @foojayio: On Foojay, @maxdearruda explains that making the lives of (#Java, #Kotlin, etc!) developers easier may be as important as mak…
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@LinksIHNieuws Maar zijn we echt in de minderheid, @JazieAnthony? Wie wil niet beter wonen, onderwijs, zorg, en werk — met “moeilijke keuzes” die voor de verandering door de Anazons, Googles, Bookings, en Ubers betaald worden…
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RT @LinksIHNieuws: Vraag: Wanneer gaan we de Tweede Kamer in? Jazie: Wanneer valt het kabinet? Helaas het feit is we zijn als links in de…
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RT @LinksIHNieuws: Soumeya Bazi: Om de vonk te laten vonken moeten we meer samen gaan chillen #DeVonk
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RT @LinksIHNieuws: Nilab: “Als ik een PVVer zie, dan denk ik: ik gun jou ook een dak boven je hoofd. Ik hoop dat we over 10 jaar terugkijke…
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RT @foojayio: As a user of #OpenJDK, whether in #Java, #Kotlin, or beyond, how was your 2024? On @nicolas_frankel…
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RT @jcon_conference: We are happy to have @AmsterdamJUG back as a partner of #JCON2025! For all #JUG members we offer 1,000 free #JavaUser…
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RT @foojayio: "Fasten all seatbelts and prepare for ludicrous #Java speed!" @RadimVansa @AzulSystems introduces you to CRaC-at-Warp-Speed o…
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