New courses now live: Wallets, deployment and formal verification. Sign up to get started đ
Learn smart contract development with our comprehensive courses
Get access to the same industry-leading smart contract development and security courses that taught thousands of engineers worldwide. Completely for free.
Over 100,000 smart contract developers taught
Create an account
All for free!
Sign in with GitHub Sign in with GoogleBy clicking Sign up with GitHub, Sign up with Google and Connect Wallet, you agree to our terms and conditions and privacy policy.
Already have an account? Log in
Hands-on courses for all levels
Learn blockchain fundamentals, smart contract development, and the auditing skills you need, online at your own pace. From blockchain concepts, essentials to Solidity, security, and web3 DevOps.
Solidity Developer
BeginnerBlockchain Basics
Start where youâre comfortable! Learn how blockchains work, smart contracts, and how to sign your first transaction. Whether youâre new or are a seasoned developer, thereâs something here for you.
Solidity Developer
BeginnerSmart contract development with Solidity
If youâre new to writing smart contracts, start here! Learn Solidity smart contract development from industry-leading experts and kickstart your career as a web3 developer.
Solidity Developer
IntermediateFoundry Fundamentals
Learn advanced web3 development concepts like Chainlink Blockchain oracles, smart contracts testing, spinning up local networks, and industry-leading tools like Foundry Forge and Anvil.
Solidity Developer
IntermediateAdvanced Foundry
Learn smart contract development techniques to write, deploy, test, optimize, and interact with your smart contract using industry-standard tools taught by the top smart contracts engineers in web3
Solidity Developer
AdvancedSmart Contract Security and Auditing
Start your career as a smart contract security researcher! Learn smart contract auditing and the best practices for writing secure and optimized protocols. Explore fuzzing, invariant testing, and formal verification to identify bugs and protect web3 protocols.
Solidity Developer
AdvancedSmart contract DevOps
Following web3 DevOps guidelines and keeping an eye on smart contracts after they're live is key to making protocols and their users, safer. This course teaches you the best practices when dealing with web3 wallets and post-deployment security, teaching you how to keep smart contracts under control, even after they've been launched.
Solidity Developer
AdvancedAssembly and Formal Verification
Learn exactly how the solidity compiler and opcodes work. Write contracts using Assembly and Yul, then learn how to write formal verification tests to guarantee your invariants hold.
Students love us
Student testimonials
Weâve helped thousands of people landing a job in web3 and level up their careers, but donât just take our word for it:
If thereâs one resource that Web3 developers point to, itâs Cyfrinâs ultimate tutorials. Theyâre standout resources that have empowered countless developers to learn blockchains, learn Solidity, and dive deep into Web3 development.
Chainlink
Chainlink
We can build systems for Ethereum scaling but without education, itâs all for nothing. Updraft is the first step towards adoption for Web3 education. We can now mint security focused developers at scale!
Tony Olendo
Lead Devrel Engineer, Polygon
Cyfrin's course was a cornerstone of my journey into Web3, providing me with the fundamentals and hands-on experience that have been pivotal to my journey in the blockchain space.
Raza
Lead Developer Relations, Scroll
Cyfrin Updraft videos on smart contract development have been instrumental in my blockchain journey, standing out with their clarity and accessibility. Their readiness to support and engage with learners makes me excited for more of their interactive and insightful content in the Web3 space
Francesco Andreoli
MetaMask
I took Cyfrin course and Iâve been working as a solutions developer at OpenZeppelin for the last few months. It was by far the most comprehensive resource and the one that really teached me the fundamentals and made me want to switch from web2 to web3
Gustavo Gonzalez
Solutions Engineer, OpenZeppelin
The Cyfrin courses were a game-changer for me. They provided a well-structured and comprehensive introduction to web3 and blockchain development. The knowledge I gained allowed me to transition into a full-time role as a blockchain developer. I can't recommend these courses enough!
Albert Hu
DeForm Founding Engineer
I took Cyfrinâs courses, and I took them seriously. At least one hour every day, documented the progress, didnât skip any second. Havenât found a better web3 course since. Now Iâm full-time in web3, working as Senior Developer Advocate at Ceramic Network.
Radek
Senior Developer Advocate, Ceramic
Cyfrin have been an absolute game-changers in my journey into blockchain. Saying their courses were remarkable, would be an understatement. Thanks to their expert guidance, I gained a deep understanding of blockchain to its roots. I'm forever grateful for their role in helping me get started in web3.
Boidushya
WalletConnect
Cyfrin blockchain and Foundry/AI courses were incredible. I've gained valuable knowledge, grown, empowering myself and others. Thank you, Cyfrin!
Idris
Developer Relations Engineer, Axelar
Not sure where to go after completing our courses?
Apply your skills at the CodeHawks competitive audits platform. Hack, win prizes and shape the future of Web3!
Support
FAQs
Canât find an answer? Join our Discord or follow us on Twitter.
Start for free
Join over 10,000 students learning to be smart contract developers.