Free System Design Course
- freeCodeCamp launched a free two-hour 'System Design Fundamentals' course covering APIs, databases, caching, and more. - A companion thread breaks down HLD/LLD, scaling, caching, CAP theorem, and practice systems like URL shorteners. - Early-career engineers are encouraged to learn these fundamentals to improve performance in backend-focused interview rounds. ( )
freeCodeCamp published a free two-hour system design course on April 16, adding a new primer on how backend software is structured at scale. (freecodecamp.org) The course was developed by Hayk Simonyan and posted through freeCodeCamp’s YouTube channel, where the video had about 60,000 views one day after publication. (freecodecamp.org, youtube.com) System design is the part of software engineering that maps how requests move through servers, databases, and networks before a product reaches millions of users. freeCodeCamp said the new lesson moves from a single-server setup to “production-ready systems.” (freecodecamp.org) The published outline starts with databases, then moves into vertical and horizontal scaling, load balancing, health checks, and single points of failure. It also covers application programming interface design, transport protocols such as Transmission Control Protocol and User Datagram Protocol, and REST and GraphQL. (freecodecamp.org) Caching appears in the video title alongside content delivery networks and production infrastructure, placing the course in the same interview-prep lane as common backend case studies. In practice, caching means storing a fast copy of frequently requested data so an app does not hit the main database every time. (youtube.com) freeCodeCamp has been building that lane for years. In July 2024, it published another system design course aimed at job interviews, with lessons on computer architecture, networking, and scalable application design. (freecodecamp.org) Its earlier interview tutorial also spelled out the topics candidates are often tested on, including database scaling, caching for read requests, sharding, and replication. Those are the same building blocks that show up in entry-level and mid-level backend interview loops. (freecodecamp.org) The new release gives early-career engineers a free, current walkthrough of the concepts that usually sit between coding exercises and real production systems. It starts with one machine and ends with the trade-offs teams face when traffic, reliability, and security all have to scale together. (freecodecamp.org, youtube.com)
