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Happy Coding!
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Happy Coding!

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@AdvisorySG @Onflow-AI @PixelPro-Studios

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w3joe/README.md

Tan Wee Joe — Model internals, AI infrastructure, reliable systems

Software Engineer @ Refractal · Computer Science @ UCL

I'm interested in what happens underneath an AI application: how models compute, how inference runs, and how to make the surrounding systems reliable. I work across model internals, AI infrastructure, and agent security.

Open-source contributor to OpenSRE and PostHog.

Technical focus

Model internals — Residual-stream analysis, activation hooks, refusal-vector steering, and mechanistic interpretability.

AI infrastructure — GPU-backed model serving, streaming APIs, evaluation pipelines, observability, SDK integrations, and containerised services.

Agent systems — Stateful execution, tool orchestration, multi-agent coordination, runtime policy enforcement, and adversarial testing.

Python · PyTorch · FastAPI · Modal · Docker · SQL · LangGraph · TypeScript · React

Building & research

Refractal — Building infrastructure for securing AI agents: runtime controls, evaluation, SDK integrations, and auditable execution.

Hypercast 4D · Research in progress
Exploring hypercomplex neural networks for multivariate time-series forecasting: implementing quaternion and related algebraic layers in PyTorch, and studying their behaviour against real-valued baselines.

Avenir-UX — Researching multimodal agents for simulated human web interaction and automated usability evaluation at UCL Nexus Labs. Pre-print ↗

Hackathon wins

ReadMyMind — Detects prompt injections in a model's residual stream and steers generation toward refusal.
🥇 1st · Cursor Cybersecurity Hackathon

Sentinel — Decentralised agents negotiate satellite collision avoidance using live orbital data and ML risk classification.
🥇 Environment Track · NVIDIA GTC Hack for Impact · Dell GB10 prize

Sentrix — A multi-agent surveillance and forensics system for detecting and investigating unsafe agent behaviour.
🥇 1st · AIEngine UCL BUILD AI Festival · NVIDIA GTC 2026 trip
🏆 Winner · Stanford ASES London · Stanford ASES trip

Onflow — Multimodal browser agents simulate real users and turn their navigation into UI/UX feedback.
🥇 1st · Bloomsbury Startup Academy Demo Day
🥈 2nd · Gemini 3 London Hackathon


Exploring mechanistic interpretability, reinforcement learning, world models, and alignment. Always up for a conversation about the systems behind AI.

Pinned Loading

  1. Tracer-Cloud/opensre Tracer-Cloud/opensre Public

    Build your own AI SRE agents. The open source toolkit for the AI era.

    Python 12.6k 1.9k

  2. Hackoholics-BH25 Hackoholics-BH25 Public

    Our solution developed for DSTA BrainHack TIL-AI 2025, tackling multi-domain AI challenges across reinforcement learning (RL), computer vision (CV), automatic speech recognition (ASR), and optical …

    Python

  3. Onflow-AI/Avenir-UX Onflow-AI/Avenir-UX Public

    Official implementation of the paper: "Avenir-UX: Automated UX Evaluation via Simulated Human Web Interaction with GUI Grounding"

    Python 20

  4. treeminspls treeminspls Public

    A platform that allows builders to stress-test their products using agentic personas and update their website.

    TypeScript

  5. sentrix sentrix Public

    Python 2

  6. Onflow-AI/onflow-landing Onflow-AI/onflow-landing Public

    TypeScript