I'm Vojta Holik — co-founder of badass.dev and the design engineer behind some of the most successful developer courses on the internet.
Since 2020, I've been building custom course platforms with Joel Hooks (egghead.io) using our open-source CMS, Course Builder.
I've helped creators like Kent C. Dodds and Matt Pocock teach millions with fast, opinionated, battle-tested platforms — used by teams at Apple, EA, Netflix, and more.
Course Builder is a technical implementation of a full-stack course framework. It's a way to build a course that represents the experience we've had building courses for the last 10 years at egghead and Badass Courses. Products listed below are all built on top of Course Builder.
AI Hero is our first cohort-based course that flips AI education on its head — designed from the ground up to be completed using AI assistants, with 1,000+ developers joining the first cohort in July 2025.
Total TypeScript is a comprehensive production-grade TypeScript training taught by Matt Pocock. In 2022, I took a crucial part in designing and developing the web experience. Since then, Total TypeScript crossed $2.5M in sales.
A live workshop series on building real-world AI systems using Model Context Protocols (MCPs). We’re running live-first, iterating fast, and we've built the platform to support it: calendar scheduling, multi-day ticketing, and real-time sales.
When Epic React first launched in 2020, it quickly became the go-to resource for learning React. I played a key role in designing and developing the learning experience, which generated over $1M in sales during its first month.
