Arun Raj
I follow money across blockchains.
Principal Engineer at Uppsala Security in Singapore. I build the forensic tooling investigators use to trace stolen crypto across chains and turn a tangle of transactions into something a prosecutor can read. Also Web3 architecture, and holographic telepresence on HoloLens before that.
Countries whose investigators use the tools
Stolen crypto traced
Crypto projects screened daily
Shipping production software
What I work on
Blockchain forensics
Tracing value across chains and mixers, scoring wallet risk, and building the AML and counter-terrorism-financing tooling investigators actually work in. The output has to hold up in a case file, not just a dashboard.
Web3 architecture
End-to-end system design for decentralised products — smart contracts, indexing, token infrastructure, and the unglamorous plumbing that keeps it consistent once real money is moving through it.
Spatial computing
Mixed reality from prototype to shipped hardware. Holographic telepresence over WebRTC on HoloLens, demonstrated at Microsoft’s New York flagship, plus the Unity3D work underneath it.
Selected work
CARA
Machine-learning wallet risk classification, built into AML and counter-terrorism-financing compliance workflows.
Machine learningScam Scanner
Automated auditing that sweeps the market for rugpulls and contract vulnerabilities before people lose money to them.
20,000+ projects dailySentinel Protocol
Crypto threat intelligence in the hands of investigators — the platform behind the tracing work.
16+ countriesHoloBeam
Holographic telepresence over WebRTC on HoloLens: a person, volumetrically captured and placed in your room.
Microsoft NY flagshipMatch Insights
Real-time tennis analytics for the Billie Jean King Cup — ball-tracking cameras and 3D radar feeding live data to broadcasters.
Broadcast analyticsEarlier
Plex for Xbox 360
One of the first third-party C# clients to put personal media libraries on the console.
Desire2Learn Binder
A Windows tablet app for students, built while touch-first on Windows was still being figured out.
iHeartRadio Player
Radio and podcast streaming for Windows, with playback that stayed out of the way.
In the open
@0k1Contributions, past year
Longest streak, in days
Years on GitHub
Languages in public repos
I take on the problems that don’t have an obvious owner.
Blockchain forensics, Web3 architecture, and spatial computing — available for consulting and advisory work. If the problem is hard, I’d like to hear about it.
mail@arunraj.xyz