Jianchao Li
Research Engineer at Mistral AI
Welcome to my corner of the internet. I’m a research engineer who builds with AI. Here I write about deep learning, computer vision, software engineering, and investing.
Portfolio Playground
A web app for building custom investment portfolios, visualizing historical performance, and comparing risk/return metrics.
Browser ML Demos
Interactive machine learning demos that run entirely in your browser using Transformers.js. No server required — all inference happens locally on your device.
Interactive Math Demos
Explore fascinating mathematical concepts through interactive visualizations and simulations — right in your browser.
Posts
Rate Limiters
I will explain five algorithms for rate limiters with example Python implementations: token bucket, leaky bucket, fixed window counter, sliding window log, and sliding window counter.
Understanding Backpropagation
··13 mins
I will explain how to understand and implement backpropagation, the mechanism used to train AI models, with computational graphs and intuitions.
No, AI Is No Longer Hype
··7 mins
Some people still dismiss AI as hype that can only handle simple tasks. I disagree. Here’s how AI has fundamentally changed the way I write, learn, and build.
Vibe Coding Portfolio Playground
··6 mins
I built a portfolio analysis tool entirely through vibe coding — 100% of the code was written by AI. Here’s what I made and what I learned.
Why Every Software Engineer Should Use AI
··4 mins
This post shares my perspectives on why every software engineer should use AI: the productivity gains it enables and the shift it is driving across the industry.
The Double-Edged Sword of Compounding
While many investors understand the power of compound returns, they may not fully grasp that compounding can also result in a significant downside. This post explores this double-edged sword.