Engineering courses built to last. Free, rigorous, battle-tested.
Distributed systems, from first principles.
A rigorous, free course on distributed systems and system design. Covers scalability, reliability, databases, caching, and real-world architecture patterns — built for engineers preparing for senior interviews and beyond.
Every pattern that matters, visualised.
A free, in-depth DSA course with visual walkthroughs, interactive visualizers, and progressive problem sets. Covers arrays, trees, graphs, dynamic programming, and every pattern that matters for technical interviews.
Build AI products that ship to production.
A practical, free AI Engineering course covering LLMs, RAG, fine-tuning, agents, and production deployment. Built for engineers who want to ship AI products, not just run notebooks.
No paywalls, no upsells. Every lesson, diagram, and problem set is free — permanently.
Complex systems become clear with visual walkthroughs, annotated diagrams, and interactive visualisers.
Each course is benchmarked against what senior engineering interviews actually demand — not watered-down survey content.