Arun Raj
Principal Engineer · Web3 & Blockchain · Immersive Tech
I build infrastructure behind crypto forensics, blockchain risk tools, and spatial computing — work that's ended up in law enforcement agencies across 16 countries and on the floor of Microsoft's flagship store.
Web3 Architecture
End-to-end Web3 system design — smart contracts, dApps, token infrastructure, and the glue that holds decentralised systems together at scale.
Blockchain Analytics
Transaction tracing, wallet risk scoring, and AML/CTF compliance tooling built for the pace of real investigations — not just compliance checkboxes.
Immersive Experiences
HoloLens, Unity3D, and spatial computing — from rough prototype to production hardware, including holographic demos at Microsoft flagship.
I've spent 10+ years building software that doesn't often have a visible interface — blockchain forensics tools used by investigators, mixed reality rigs for enterprise, and analytics pipelines that quietly run in the background of real operations.
Right now I'm Principal Engineer at Uppsala Security, where our tools help law enforcement trace stolen crypto across chains and borders.
Before that, seven years at Valorem Reply building immersive experiences — most notably HoloBeam, a holographic telepresence system that ended up showcased at Microsoft's flagship in New York.
Principal Engineer at Uppsala Security. Open to consulting on Web3 architecture and immersive tech.
Principal Engineer
Leading engineering on core Uppsala Security products — blockchain analytics platforms and cryptocurrency tracking tools actively used by global law enforcement. Responsible for technical direction, code review standards, and cross-team architecture.
Senior Software Engineer
Core contributor to Uppsala's analytics suite: building transaction tracing pipelines, wallet risk classification systems, and fraud detection tooling at the intersection of crypto and compliance.
Software Engineer II
Seven years building immersive experiences on Microsoft's ecosystem. Designed and shipped HoloBeam — a real-time holographic telepresence system using HoloLens and WebRTC — demonstrated at Microsoft's New York flagship. Also delivered Billie Jean King Cup analytics, Xbox 360 and Windows consumer apps.
CARA
Crypto Analysis Risk Assessment — ML system classifying wallet risk and identifying malicious on-chain behaviour for AML and CTF compliance workflows.
Scam Scanner
Automated crypto security platform scanning 20,000+ projects daily, scoring token risk and surfacing rugpulls, honeypots, and contract vulnerabilities.
Sentinel Protocol
Global crypto threat intelligence platform used by Interpol and law enforcement across 16+ countries. Directly supported investigations tracing over $10M in stolen digital assets.
HoloBeam
Holographic telepresence built on HoloLens and WebRTC — letting two people share a real-time 3D space from different locations. Demonstrated at Microsoft's flagship store in New York.
Billie Jean King Cup Match Insights
Real-time tennis analytics for the world's premier women's team competition — Azure-powered, with ball-tracking cameras and 3D radar delivering live statistics to broadcasters and fans.
Plex for Xbox 360
One of the first third-party C# clients to bring personal media libraries to the console.
Desire2Learn Binder
Windows tablet app giving students a digital binder — built when touch-first on Windows was still being figured out.
iHeartRadio Player
Radio and podcast streaming for Windows with clean playback UI built around live station switching.
Let's build
something
great.
If you're working on something in the crypto security, Web3, or spatial computing space — or want to talk through a hard technical problem — I'm interested. No cold pitches, just good conversation.