Jos Van Der Westhuizen
Member Of Technical Staff at World Labs
San Francisco, California, United States
Summary
👤
Senior🎓
Top SchoolJos Van Der Westhuizen is a technical founder and Member of Technical Staff with 8+ years building AI products end-to-end, from PhD research to multi-million-user production systems. He completed a Cambridge PhD in Machine Learning in 2.5 years with publications on LSTMs and sequence models, then translated that research into scalable products used by 1.5M+ users and 25+ Fortune 1000 customers. As a serial founder he architected and personally implemented large portions of complex systems—reducing inference costs by up to 30%, cutting token usage 68%, and shipping a Unity-focused AI assistant that reached 10K+ MAU and 7K+ GitHub stars. He combines deep ML expertise (RLHF, variational inference, diarization) with full-stack execution across Python, C#, Unity, and production infra, and is currently focused on AI safety, human-AI collaboration, and frontier model capabilities. A distinctive strength is turning research ideas into practical engineering tricks—like a DSL that slashed LLM token needs 90%—that make cutting-edge models economically viable in real products.
8 years of coding experience
13 years of employment as a software developer
Doctor of Philosophy (Ph.D.), Machine Learning, Doctor of Philosophy (Ph.D.), Machine Learning at University of CambridgeMaster’s Degree (dropout), Biomedical Engineering, Master’s Degree (dropout), Biomedical Engineering at Stellenbosch University
Afrikaans, English, German
Github Skills (48)
python10
inventory-management10
endpoint-security10
incident-response10
targets9
network-analysis8
network-visualization8
csv-import7
pcap7
packet-capture7
security7
packet7
network7
network-security7
guard6
Programming languages (8)
Github contributions (5)
jos-ir/DNS-tracer
Nov 2019 - Jun 2022
Contributions:29 commits, 28 pushes, 1 branch in 2 years 6 months
DfirJos/velociraptor
Apr 2020 - Aug 2023
Digging Deeper....
Contributions:10 PRs, 32 pushes, 15 branches in 3 years 4 months
deeperdiggingpython
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