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Learn by rebuilding Redis, Git, a database from scratch

Learn by rebuilding Redis, Git, a database from scratch

by acley·Jul 11, 2026·170 points·44 comments

AI Analysis

●●●BangerBig BrainSolve My ProblemCrowd Pleaser

Finally, a platform that forces you to write the Redis wire protocol yourself instead of just reading about it.

Strengths
  • Execution-based lessons prevent cheating by actually running your code against test cases.
  • Covers low-level systems like OS kernels and compilers that most bootcamps ignore completely.
  • Multi-language support lets you rebuild the same system in Rust, Go, or C to compare approaches.
Weaknesses
  • 80+ courses sounds impressive but many are likely thin wrappers around standard tutorial content.
  • AI feedback loop is mentioned but undefined; could easily degrade into generic LLM hints.
Category
Target Audience

Junior developers and CS students wanting deep system understanding

Similar To

CodeCrafters · Build Your Own X · Exercism

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