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RareSkills focuses on upskilling experienced blockchain and smart contract engineers.

They publish free books on advanced blockchain topics, including zero-knowledge proofs, smart contract security, and protocol explainers. Its main product is paid cohorts where the industry’s most successful developers and auditors upskill enrolled engineers.

RareSkills boasts a track record of training engineers at various levels, including those assuming roles as protocol leads. Notably, engineers from esteemed blockchain enterprises have participated in their programs.