Blockchain Developer

Learn distributed ledgers, smart contracts and decentralized application architecture with security at the center.

In short— Web3 bila vibes za blindly copy-paste contracts—understand chain kwanza.

Free roadmap

What you'll learn

Click any stage kufungua full details.

01Stage 01Core foundationsJavaScript or TypeScript • Data structures, hashing and networking

Build normal software and web fundamentals before adding blockchain complexity.

Focus on

  • JavaScript or TypeScript
  • Data structures, hashing and networking
  • Web apps, APIs and Git
Build check: Build and deploy a conventional web app.

Ukimaliza hapa, usirush next stage—build kitu kwanza.

02Stage 02Blockchain conceptsBlocks, transactions and consensus • Wallets, keys and signatures

Understand how decentralized networks reach agreement and preserve state.

Focus on

  • Blocks, transactions and consensus
  • Wallets, keys and signatures
  • Ethereum and EVM fundamentals
Build check: Inspect and explain real testnet transactions.

Ukimaliza hapa, usirush next stage—build kitu kwanza.

03Stage 03Smart contractsSolidity language fundamentals • Contract storage, events and errors

Write deterministic programs with careful state and access control.

Focus on

  • Solidity language fundamentals
  • Contract storage, events and errors
  • Testing with Foundry or Hardhat
Build check: Build and test a simple escrow contract.

Ukimaliza hapa, usirush next stage—build kitu kwanza.

04Stage 04DApp integrationWallet connections and providers • Contract ABIs and event indexing

Connect contracts to usable interfaces and wallet workflows.

Focus on

  • Wallet connections and providers
  • Contract ABIs and event indexing
  • Frontend state and transaction UX
Build check: Build a complete testnet DApp.

Ukimaliza hapa, usirush next stage—build kitu kwanza.

05Stage 05SecurityReentrancy and access-control risks • Oracles, front-running and upgrades

Recognize contract-specific risks where mistakes may be irreversible.

Focus on

  • Reentrancy and access-control risks
  • Oracles, front-running and upgrades
  • Static analysis and audit methods
Build check: Complete vulnerable-contract security labs.

Ukimaliza hapa, usirush next stage—build kitu kwanza.

06Stage 06Production ecosystemLayer 2 networks and bridges • Monitoring and contract verification

Understand scaling, operations and responsible product trade-offs.

Focus on

  • Layer 2 networks and bridges
  • Monitoring and contract verification
  • Governance and legal considerations
Build check: Ship a documented testnet capstone.

Ukimaliza hapa, usirush next stage—build kitu kwanza.

Now build kitu real.

Pick one project that solves an actual problem, ship it, then explain what you learned. Hapo ndio portfolio inaanza kuhit different.

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