Jesse Hall is the developer educator behind codeSTACKr and a staff developer advocate at LiveKit. He creates articles, videos, courses and presentations that teach web application development and real-time AI interfaces.[1]
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Links
Website
GitHub YouTube LinkedIn 
X · codestackr Staff Developer Advocate · LiveKit
Career
Hall is a self-taught full-stack developer. His conference biography describes a focus on JavaScript, TypeScript, React, Node.js, Next.js and real-time communication. His codeSTACKr site and YouTube channel give learners concrete projects and explain the choices involved in building for the web. His earlier work at MongoDB included teaching document data modeling and AI applications.[1][5]
Contributions
A paced introduction to JavaScript
Hall’s 100 Days of JavaScript course organizes learning into small daily lessons. It covers data types, functions and objects before moving into document manipulation, JSON, APIs and asynchronous programming. That order connects the language’s foundations to visible browser behavior and eventually to applications that wait for information from other systems.[2]
Resources learners can inspect
His GitHub profile links his teaching channel and VS Code course and collects tutorial repositories. The codeSTACKr website adds written roadmaps and interface lessons, including a CSS-only theme toggle and guides to choosing web technologies. These formats let learners move between a worked demonstration, the accompanying source code and a broader map of what to learn next.[3][4]
Tools, writing & talks
Writing, research & talks
Start here
100 Days of JavaScript100daysofjavascript.comA daily course progressing from JavaScript fundamentals to browser interfaces, APIs and asynchronous code.
Choose the daily course if you are beginning JavaScript. It introduces the language before browser and API work, so you can build the foundation needed for his more advanced application tutorials.
Creator and instructor[2]LiveKit on building voice agents that feel human. Why leaderboards mislead, how errors compound across the STT, LLM and TTS pipeline, audio-based turn detection, covering tool-call delays, and a latency budget with an open-source benchmark.
Catalog workOriginal source- codeSTACKrcodestackr.com
Web development tutorials, technology roadmaps and explanations of practical interface techniques.
Creator and author[4] - From Geek Squad to MongoDB Advocatehtmlallthethings.com
An interview about learning development, teaching beginners and moving from database concepts to agent applications.
Interview guest[5]