Julien Klepatch – Dapp 30

How to get your first Blockchain developer job?

• 1. You need to know how to build decentralized applications on the Blockchain (Dapps)
• 2. And you need to convince company that you know 1.

Most people think that you need to from 1., and move your way to 2. But that’s not the most effective way…after all, what’s the point of studying all this Blockchain stuff if you can’t monetize it?

So… let’s reverse engineer the problem, and from 2.

The good news is that there IS a simple method to convince Blockchain companies to hire you…

However, most Blockchain development course won’t teach you this…

The solution, my friend, is to…

Build a portfolio of Blockchain applications (Dapps)

There is nothing more effective that a portfolio of projects to demonstrate your technical skills.

No need to over-optimize your CV, or exaggerate your past achievements. This does not work. Just show your code.

Ok great, but… what should you build?

A good portfolio is like a good wardrobe: you have a little bit of everything to cover different use-cases.

For Ethereum Dapps that means:

• Financial applications (Manipulate Ether, ERC20, ICO…)
• Good knowledge of tokens (ERC20, ERC721)
• Governance (DAO)
• Game (ERC721, Crypto-collectibles)
• Generate randomness
• Importing data to the Blockchain (oracles)
• Low-level knowledge of the EVM (assembly)

Your portfolio should also demonstrate that you know how to:

• Write safe Solidity smart contracts => smart contracts manipulate money, safety is VERY important
• Test your Solidity code => smart contracts can’t be updated, so tests are VERY important
• Integrate smart contracts with your frontend by using Web3
• Integrate frontend with wallets like Metamask
• Have a modern reactive UI, by using frontend Dapp framework like Drizzle
• Know how to use modern development tools of Ethereum

Phew! That’s a lot to take in… So… how are you going to come up with a Dapp portfolio that not only satisfies all the above conditions BUT also which s simple and increase in difficulty, so that you have the time to learn progressively?Dapp 30, a stunning collection of 30 decentralized applications

Dapp 30 is a course for Blockchain development where we build 30 decentralized applications (Dapps) on the Ethereum Blockchain.

This course will teach you:

• How to develop advanced smart contracts with Solidity and Remix
• How to tests your smart contracts like a pro with Truffle and Openzeppelin testing utilities
• How build stunning & reactive frontend UI connected to your smart contracts, using Truffle, Web3, Metamask, React & Drizzle

I built Dapp 30 by using the portfolio of Dapps I used myself to learn Ethereum and get my first Blockchain job paid 100k USD / year (remote).

In Dapp 30, we with very simple smart contracts and Dapps, like Split payments or Wallets. Then we progressively increase the difficulty with Dapps like Multisig wallets, DAO, all the way up to advanced Dapps like decentralized Ebay, Twitter, and ERC20 ICO.

You can find the full list of Dapps if you scroll down and click on the down arrow to expand the full curriculum.

It’s important to have a nice Dapp portfolio, but it’s also important to use the right tools and technologies. Otherwise, if you use outdated tech, it’s going to be difficult to be hired.

Dapp 30 covers all the modern technologies of Blockchain & Ethereum

• Solidity, the most popular language of smart contracts
• Remix, and easy to use IDE for Solidity
• Truffle, the most popular framework for Solidity smart contracts
• Openzeppelin, a secure library for Solidity
• Web3, a library to integrate frontends with smart contracts
• Drizzle, a library to keep your frontend up-to-date with smart contracts (reactive UI)
• Javascript, React

For all these techs, we use the latest versions. Many course are outdated, but Dapp 30 regularly receives updates. For example, Dapp 30 uses Solidity 0.5 and web3 1.2, whereas many other courses use Solidity 0.4 and web3 0.x…

Are you a builder (#BUIDL)?

There are 2 kind of developers:

• #1 The scholars
• #2 The builders

Scholars like to study programming…but they don’t build much, and they generally don’t have the best jobs (or no job at all!!).

Builders prefer to build stuffs. They learn better by building, but they also love the process of building. And, last but the least, they get way better jobs.

This course is definitely for builders.

There is no long introduction with boring theoretical explanations. It s straight with your first smart contract, and give you the explanations you need as we progress.

Because the course is progressive, you are never overwhelmed with too much difficulty. Knowledge is delivered just when it’s needed.

What are the pre-requisites?

This is not a beginner course. You need to have at least 1 year of experience as a web developer.

On the other hand, you don’t need to be a frontend expert to follow. You just need to understand the basics of web development (html, css and Javascript).

On the Blockchain side, no experience is required.

Details of what you will learn

For each Dapp, the tutorials will be broken down in:

• Smart contract
• Tests
• Frontend

Smart contracts (Solidity)

• Develop Solidity smart contract with the Remix IDE
• Deploy and Interact with smart contracts in Remix IDE
• Run a local development Blockchain in Remix IDE
• Structure of smart contracts
• Variables: string, integers, arrays, structs…
• Functions: view, public, private
• Calls vs Transactions
• Storage vs Memory variables
• Security considerations
• Test smart contracts
• Remix
• Solidity

Tests

• How to tests your Solidity smart contract with Truffle
• How to do advanced tests like time-sensitive tests
• How to use advanced testing libraries for Solidity development, like the oppezelllin test helper
• How to test ERC20 and ERC721 tokens, and many more
• Truffle
• Solidity

Frontend

• How to integrate a smart contract using Web3
• How to integrate the frontend of a Dapp with Metamask
• How to deploy to public testnet (ex: Ropsten) or Mainnet
• Truffle
• Web3
• Infura
• Javascript
• React
• Drizzle

When you buy this course you get access to

• 30 high-quality video tutorials for Ethereum decentralized applications from simple to advanced level
• Covers smart contract development (Solidity, OpenZeppelin), smart contract tests and integration with frontend UI (Truffle, Web3, React)
• Complete source code of all tutorials (git repo)
• Access to a private Telegram with other students of Dapp 30
• Lifetime support from the instructor, Julien
• Bonus 1: mini-course on smart contract security
• Bonus 2: mini-course on smart contract debugging
• Bonus 3: lifetime access for course updates

Your Instructor

• Smart contract (10:06)
• Tests (5:03)
• Frontend (11:30)