Noah Han — Bay Area Software Engineer & DIY Maker

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Building AI systems, software, and real-world infrastructure.

I build NLP/LLM systems, design recommendation engines, architect software, retrofit physical infrastructure, and cultivate systematic learning frameworks.

AI/ML ENGINEERING · SYSTEMS THINKING · DIY HARDWARE

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Noah Han<br>Software Engineer · AI/ML Systems

Location Bay Area, CA Focus NLP, LLMs, Recommender Systems Currently Building systems & writing

Synthesized thinking & writing

Featured Posts

Documenting technical explorations, soft skills, systematic learning models, and life observations.

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Engineering & AI AI & Machine LearningAI Engineering<br>Preface to the “Foundations and Frontiers of Large Language Models” Series<br>A structured, engineer‑focused introduction to the “Foundations and Frontiers of Large Language Models” series — connecting the core principles, architectural breakthroughs, engineering paradigms, and emerging system‑level patterns behind modern LLMs. This preface outlines why the series exists, who it’s for, and how it maps the evolution from statistical NLP to Transformers, from prompting to RAG, from reasoning to agentic systems, and from classical recommenders to LLM‑native paradigms.

Jun 2026 · 4 min read

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Engineering & AI AI & Machine Learning<br>Rapid ML Prototyping: Re-evaluating Weka for Classic Classification Tasks<br>A pragmatic guide to using Weka's GUI for quick baseline classification, parsing CSV constraints, and extracting the power of traditional ML models like SMO (SVM).

Jun 2026 · 5 min read

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Engineering & AI Career & Growth<br>Why We 'Dial' a Phone Number Instead of 'Pressing'<br>Deconstructing the physical mechanics of pulse dialing, the linguistic origin of 'dialing', and a childhood experiment in manual hardware hijacking via telephone hook switches.

Jun 2026 · 5 min read

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Real-world engineering & DIY hacking

Featured Projects

I believe true understanding comes from tearing things down and building them back better. Here are my favorite physical engineering projects.

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Automotive DIY Suburban cabin filter saga: From weird AC smell to cutting open a “sealed” filter slot

My Suburban’s AC developed a sharp odor that honestly smelled like pee — and with young kids at the time, I even wondered if someone had an accident in the car. After sprays failed, deeper research revealed the real cause: GM had sealed the cabin‑filter slot from the factory. Cutting it open and installing a proper filter finally eliminated the smell.<br><br>Automotive DIY

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Automotive DIY Upgrading Legacy Hardware: Bringing a 2013 Suburban into the Modern Infotainment Era

A software engineer's guide to upgrading a 2013 GMT900 Suburban to a modern wireless CarPlay/Android Auto infotainment center. Covers plug-and-play wiring architecture, relay power isolation, custom dual-USB fabrication, and precision dashboard drilling for optimal antenna telemetry.<br>Automotive DIY

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