hoi
I’m Mats.
Software engineer in The Hague. I like taking things apart (video doorbells, Java bytecode, the Dutch housing market) and writing down what I find, usually powered by an irresponsible amount of Red Bull.
favourite writing
Saying goodbye to Java rebuilds, hello to JavaScript (but still in the JVM)
The journey of PixelScript, the fastest development cycle for Minecraft content.
15 Jul 2025 · 20 min read
recent
The Cost of One Bit: Packed Boolean Computation on x86-64
Grace: Encrypting Java Bytecode at Rest Without Runtime Cost
Protecting customer media sources with asymmetric encryption
Migrating from Cloudflare D1 to Hyperdrive
Hacking the housing market
Dutch Rail Data Heist: Real-Time Metrics, APIs, and Commuter Chaos
things i made
OpenAudioMc
Web audio and proximity voice chat for Minecraft. Free and open source since 2016, a few hundred thousand players a month.
openaudiomc.netImagineFun
A Disney park recreated in Minecraft, with working rides and shows. I write the server software.
imaginefun.netMeteor & pixelib
Java RPC where the interface is the contract, plus the rest of my Java libraries and a Maven repo.
pixelib.devMojang blocklist checker
See whether a Minecraft server is on Mojang's enforcement blocklist, and track changes over time.
mc-blacklist.comrivet.games
Factory SMP. Opening soon.
rivet.games