# The Hardest Blockchain Solidity Bootcamp Cover your knowledge gaps in web3. Go from junior to senior blockchain engineer. **[RareSkills](https://www.rareskills.io) invites you to apply to the best solidity bootcamp.** ---- ### Why is it the best solidity bootcamp? Smallest class sizes: **5 students** - Weekly **one on one expert code reviews** - **Grow as fast as possible** with very challenging assignments - It's **longer** than any other blockchain bootcamp. - We **curate applicants** to create an awesome community. ### Requirements - You should already know basic Solidity - We have be able to pass an algorithm interview - You should be familiar with javascript - Passion for blockchain and web3 is a must ### How hard? Ready to spend weeks programming in assembly? Expect to spend 20 hours at least to stay caught up. More junior students will need to study full time. Topics include security, applied cryptography, gas optimization, and design patterns. Learn more in our [course description](https://www.rareskills.io/web3-blockchain-bootcamps/solidity). When you finish it, you can move on to even more advanced topics such as DeFi, zero knowledge proofs, and consensus algorithms. See the complete [list of blockchain bootcamps](https://www.rareskills.io/web3-blockchain-bootcamps). ### When does it start? It starts on a rolling basis. The next cohort starts January 2023 ### How much does it cost? $5,800 to $6,400 depending on if you pay with crypto and if you pay upfront or monthly. ### Socials [Twitter](https://twitter.com/RareSkills_io) [LinkedIn](https://linkedin.com/company/rareskills-io) [Website](https://www.rareskills.io) ### Apply now [rareskills.io/apply-now](https://rareskills.io/apply-no)