Web3 and Blockchain Development for Web2 Developers — PickAClass
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⏱ 3h 📚 29 lessons 🎧 Audio version

Web3 and Blockchain Development for Web2 Developers

Transition from traditional web development to decentralized applications by mastering Solidity, smart contracts, and Web3 integration patterns.

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About this course

The shift from centralized web architectures to decentralized platforms is redefining how we build applications. If you are a web developer looking to expand into the blockchain space, understanding the core shift in architecture is your first step. This text-based course guides you through the foundational concepts of Web3, helping you bridge the gap between traditional development and decentralized systems. What you'll learn: - Understand the core principles of blockchain technology, cryptography, and consensus mechanisms. - Write and test smart contracts using Solidity and modern developer tooling. - Integrate decentralized applications with web interfaces using Web3 libraries. - Explore the mechanics of decentralized finance (DeFi), non-fungible tokens (NFTs), and decentralized identity. - Apply Layer 2 scaling concepts and understand gas fee optimization. - Practice debugging smart contracts through written code walkthroughs and structured exercises. Starting with fundamental blockchain definitions and cryptography basics, the course progresses through smart contract anatomy, security best practices, and practical integration techniques for modern web applications. This course is designed for web developers with basic programming knowledge who want to enter the Web3 space, with no prior blockchain experience required. Start your journey into decentralized development today.

Course contents

6 modules · 29 lessons · 3h

1 Blockchain Fundamentals
Understand the shift from centralized to decentralized architectures. 5 lessons · 32 min
  1. What is Web3?
    Defining blockchain and the shift from Web2 client-server to Web3 peer-to-peer architecture.    7 min
  2. The Distributed Ledger
    How blocks, chains, and decentralization ensure data integrity.    6 min
  3. Cryptography Basics
    Understanding hashing and public-key cryptography in the context of wallets.    7 min
  4. Consensus Mechanisms
    How networks agree on truth through Proof of Work and Proof of Stake.    6 min
  5. Nodes and Networks
    The role of nodes and the difference between Mainnet, Testnets, and Local nets.    6 min
2 Solidity and Smart Contract Anatomy
Learn to write logic for the Ethereum Virtual Machine. 5 lessons · 32 min
  1. Anatomy of a Smart Contract
    Breaking down the structure of a .sol file including pragmas and contract blocks.    6 min
  2. Solidity Syntax 101
    Basic data types, variables, and function visibility in Solidity.    7 min
  3. Managing State
    How storage, memory, and calldata work in smart contracts.    6 min
  4. Control Flow and Errors
    Using require, revert, and assert for logic validation.    7 min
  5. Modern Developer Tooling
    Setting up a professional environment with Hardhat or Foundry.    6 min
3 Testing, Debugging, and Optimization
Ensuring code quality, security, and cost-efficiency. 5 lessons · 32 min
  1. Testing Smart Contracts
    Writing unit tests in JavaScript/TypeScript to verify contract logic.    6 min
  2. Debugging Techniques
    Using console.log and transaction traces to find bugs in code.    6 min
  3. Common Security Pitfalls
    Understanding vulnerabilities like Reentrancy and Integer Overflow.    7 min
  4. Security Best Practices
    Implementing the Checks-Effects-Interactions pattern and Access Control.    7 min
  5. Gas Fee Optimization
    Writing efficient code to minimize transaction costs for users.    6 min
4 The Web3 Ecosystem
Exploring advanced concepts like DeFi, NFTs, and Scaling. 5 lessons · 30 min
  1. DeFi Mechanics
    How ERC-20 tokens, liquidity pools, and automated market makers work.    6 min
  2. NFT Standards
    Understanding ERC-721 and ERC-1155 for digital ownership.    6 min
  3. Decentralized Identity (DID)
    How wallets and ENS replace traditional login/password systems.    6 min
  4. Layer 2 Scaling
    How Rollups and Sidechains solve the Ethereum scalability problem.    6 min
  5. Oracles and Data
    Bringing real-world data onto the blockchain using Chainlink.    6 min
5 Integrating with Web Interfaces
Connecting the frontend to the blockchain. 5 lessons · 30 min
  1. Intro to Ethers.js
    Setting up a Web3 library to communicate with the Ethereum network.    6 min
  2. Connecting Wallets
    Implementing a 'Connect Wallet' button using MetaMask and Ethers.js.    6 min
  3. Reading and Writing Data
    Calling view functions and sending transactions from the UI.    6 min
  4. Handling Events
    Listening to smart contract events to update the UI in real-time.    6 min
  5. Transaction States
    Managing pending, success, and error states for blockchain transactions.    6 min
6 Deployment and Full-Stack dApps
Launching your application to the world. 4 lessons · 24 min
  1. Deployment to Testnets
    Using API providers like Alchemy to deploy contracts to Sepolia.    6 min
  2. Contract Verification
    Verifying source code on Etherscan for transparency.    6 min
  3. Full-Stack dApp Architecture
    Organizing a project with a frontend, smart contracts, and IPFS.    6 min
  4. The Road Ahead
    Summary of the course and resources for further Web3 mastery.    6 min
Final project

Decentralized 'Kudos' Platform

Build a full-stack dApp where users can send 'Kudos' (tokens) to others. The project includes a smart contract for managing kudos, a frontend to interact with it, and an NFT receipt for every 10 kudos received.

What you'll get

  • 📜 Certificate of completion
    Add it to your LinkedIn profile
  • 💬 Personal AI tutor
    Stuck on a lesson? Ask your built-in tutor anything, any time.
  • 🎧 Audio version included
    Learn on the go — no screen needed
  • ♾️ Lifetime access
    Come back anytime, no expiry
  • 📱 Phone or computer
    Works anywhere, any device
  • 💸 14-day refund
    No questions asked
  • ⚡ Short & focused
    3h of practical content

Certificate of completion

Every course you complete on PickAClass issues a credential like this — original, with its own code, verifiable by URL, and detailed about what was actually demonstrated.

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PickAClass
Skills profile · verifiable
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Certificate of Mastery
This certifies that
Name Surname
has successfully demonstrated mastery of
Web3 and Blockchain Development for Web2 Developers
Skills demonstrated
✓
Behavioral pattern analysis
Foundational
1.2 hrs
✓
Decision-architecture frameworks
Proficient
1.4 hrs
✓
A/B test design
Proficient
1.7 hrs
✓
Behavioral copywriting
Advanced
1.9 hrs
P
PickAClass — Name Surname
Web3 and Blockchain Development for Web2 Developers
Page 2 of 2
Performance detail
Coursework summary
Lessons completed 14 / 14
Practice questions 26 / 28
Assignments submitted 4 (avg 4.5 / 5)
Capstone project Reviewed — 4.6 / 5
Total practice 6.2 hrs
Performance benchmark
Cohort rank Top 12% of 1,625
Time to completion 11 days (median: 22)
Mastery score 91 / 100
Practice-question score 94%
Skill verification Verified Skill Path
Verify this credential
pickaclass.com/certificates/PCC-2026-X4F7-AP19
Issued under the academic standards of PickAClass. Skill levels reflect assessed performance against the course's competency rubric. This is an original credential of this platform.

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Frequently asked

What do I need to take this course? +

Just a phone or computer with internet. No installs, no special hardware.

How do I pay? +

By card via Stripe. We don’t store card details — Stripe handles them securely.

Can I get a refund? +

Yes — full refund within 14 days, no questions asked.

How long will I have access? +

Forever. Once you purchase, the course is yours to revisit anytime.

Will I get a certificate? +

Yes. On completion you'll receive a certificate you can add to your LinkedIn profile.

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