I'm primarily a frontend developer, but I'm increasingly interviewing for full-stack and forward-deployed engineer roles. The interviews often cover backend fundamentals, system design, data architecture, concurrency, scalability, and sometimes coding exercises through platforms like LeetCode or Codility. Are there any genuinely interactive training platforms—similar to Scrimba—that can help me quickly learn and practice designing backend systems?
3 Answers
Most interactive system design resources are still fairly limited. A practical approach is to take a fundamentals course and repeatedly practice common building blocks such as load balancers, caches, databases, queues, and background workers. Draw the architecture and explain the tradeoffs out loud. In many interviews, the reasoning matters more than producing a perfect diagram.
Hello Interview is worth checking out if you want structured system design interview practice. The complete material is paid, but its free video content is still useful. A system design roadmap is also a good way to organize the fundamentals and identify gaps in your knowledge.
JavaScript Mastery has several backend-focused projects and does a good job explaining the concepts as you build. It can be useful if you learn best by implementing rather than just watching system design diagrams.

That makes sense. Are chat-based study groups or other communities useful for practicing these discussions with people?