Monthly Archives: April 2026

Today Quincy Larson interviews Jessica Rose. She’s a dev and teacher who’s worked on open data projects at Mozilla and lots of open source projects. We talk about: How the whole world is hard, and how embracing that difficulty rather than avoiding it can make you a better thinker The Bad Website club, a free […]

A quiet shift is happening inside modern companies. It’s not visible in dashboards. It’s not tracked in logs. It’s not approved by IT or security teams. Yet it’s everywhere. Employees are using AI tools on their own. They paste code into chatbots to debug faster. They upload documents to summarise reports. They generate emails, analyse […]

Enormous amounts of data are constantly generated on the open web. Product prices change, job listings go live and get taken down, news articles are published, and company information gets updated. For developers and teams that rely on this kind of data, the question has never been whether to scrape the web, but how to […]

Every developer eventually runs into a slow query. The table has grown from a few hundred rows to a few million, and what used to take milliseconds now takes seconds — or worse. The fix, more often than not, is an index. A database index is a data structure that helps the database find rows […]

They say data is the new gold. But navigating through a large dataset to meet the demands of consumers in record time still gives backend devs a headache. Conventional database queries often aren’t totally reliable in getting accurate search results fast. But fortunately, Elasticsearch comes to the rescue. In this article, I’ll walk you through […]

Commitment of Traders (COT) data gets referenced a lot in commodity trading, especially when people talk about crowded positioning, speculative sentiment, or reversal risk. But most of that discussion stays at the idea level. It rarely becomes a rule that can actually be tested. That was the starting point for this project. I wanted to […]

Today Quincy Larson interviews Mark Mahoney. He worked as a dev before becoming a computer science professor. He’s taught computer science for 23 years at Carthage College, a 180-year-old US university. He’s also taught thousands of developers through his free programming courses built on top of his own open source course platform, Playback Press. We […]

Learn CUDA programming for NVIDIA Hopper GPUs. We just posted a course on the freeCodeCamp.org YouTube channel that will teach you to build efficient WGMMA pipelines and leverage Cutlass optimizations to perform the massive matrix multiplications that power modern AI. Beyond single-chip performance, the curriculum covers multi-GPU scaling and NCCL primitives necessary for training trillion-parameter […]

We’ve all been there: You open ChatGPT, drop a prompt. “Extract all emails from this sheet and categorize by sentiment.” It gives you something close. You correct it, it apologizes, and gives you a new version. You ask for a different format, and suddenly, it’s lost all context from earlier, and you’re starting over. Errors […]

Have you ever wondered how platforms like Etsy, Uber, or Teachable handle payments for thousands of sellers? The answer is a multi-vendor marketplace: an application where merchants can sign up, list products or services, and receive payments directly from customers. In this handbook, you’ll build a complete marketplace from scratch using TypeScript. You won’t need […]