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Academy · Emerging Technology · intermediate

HIGAET Web3 Engineering

Master wallets, decentralized identity, smart contract frontends, and NFT systems while engineering full-stack Web3 products through HIGAET Practical Training applied projects.

Duration

8 weeks · 6-8 hours/week

Level

Intermediate

Delivery

Online

Status

Open for enrollment

Introduction

Why this technology matters.

Web3 engineering is full-stack product engineering for decentralized systems — wallet-connected frontends, signature-based identity, and smart-contract backends — and it matters now because users expect to own assets and identity while still getting usable apps. You will learn how wallets, contracts, and frontends connect, starting from simple signing flows to complete products.

It is used for wallet-connected storefronts, decentralized login and authentication, and NFT minting, listing, and marketplace interactions. It solves user-owned assets and verifiable actions well, but it does not fix poor user experience, it does not remove gas fees, latency, or failed transactions, and slick frontends do not fix insecure contracts.

By the end you will be able to build a wallet-connected frontend with transaction signing flows, a signature-based decentralized identity and login system, and an NFT minting and marketplace app integrated with testnet contracts.

Why this course exists

The gap is wide between a demo button that mints once on a local chain and a product that handles wallet states, rejected signatures, network switches, and contract errors gracefully. This course teaches the arc from wallets to signing to identity to contract frontends to testnet-integrated deployment, so your apps survive real users and real networks.

Overview

Know exactly what you're signing up for.

Who is this for

Frontend developersSoftware developersProduct managersEntrepreneursStudentsCareer changers

Prerequisites

  • Comfortable with JavaScript and frontend fundamentals
  • Familiarity with APIs and JSON data
  • Basic understanding of blockchain concepts

Technologies & tools

Web3 walletsEthers.jsSmart contract frontendsDecentralized identityNFT standardsTest networksIPFSReact

Skills you'll gain

Wallet integrationTransaction signing flowsDecentralized identitySmart contract frontendsNFT systemsWeb3 product deployment
Curriculum

A 8 weeks arc, module by module.

  1. Module 01

    Module 01 — Foundations: Web3 architecture, wallets, and networks

  2. Module 02

    Module 02 — Core: accounts, signatures, transactions, and gas

  3. Module 03

    Module 03 — Core: contract ABIs, libraries, and frontend connections

  4. Module 04

    Module 04 — Engineering: decentralized identity, sessions, and permissions

  5. Module 05

    Module 05 — Engineering: NFTs, marketplaces, and metadata storage

  6. Module 06

    Module 06 — Advanced: indexing, notifications, and oracle data

  7. Module 07

    Module 07 — Production: security, testing, analytics, and deployment

  8. Module 08

    Module 08 — Capstone: launch a full-stack Web3 application on a test network

Practical Training Flow

Learning → Guided Labs → Independent Practice → Industry Project → Capstone → Portfolio → Career Preparation. Practical hours are tracked alongside instructional hours and surfaced on the certificate.

Delivery as HIGAET Practical Training / Experiential Learning.

web3 engineeringdecentralized applicationswalletsnft marketplacesdecentralized identityipfs storagefrontend developmentsmart contract integrationhigaet academy
Outcomes

What you'll be able to do.

  • Build wallet-connected Web3 frontends with transaction signing flows
  • Design decentralized identity and authentication using signatures
  • Develop NFT minting, listing, and marketplace interactions
  • Deploy Web3 frontends with testnet contract integrations
  • Integrate IPFS storage, indexers, and price oracles
  • Evaluate gas costs, wallet UX, and protocol trade-offs
  • Secure frontend transactions against phishing and approval risks
  • Automate contract interaction testing and release checks
Projects

You will build.

Every project ships as HIGAET Practical Training / Experiential Learning — portfolio-ready work, not exercises.

  1. Project 01

    Wallet-connected frontend with transaction signing

  2. Project 02

    Signature-based decentralized identity login

  3. Project 03

    NFT minting and listing interface

  4. Capstone

    Full-stack Web3 product with testnet contract integration

Key concepts

Speak the language first.

Wallet-connected frontends
Web interfaces that connect to user wallets to display balances and initiate on-chain actions.
Transaction signing flows
The request, review, sign, and confirm sequence a user follows to approve a blockchain transaction.
Decentralized identity
Identity based on user-controlled keys and signatures rather than a central login database.
Signature-based authentication
Login by signing a challenge message with a wallet key so the app verifies ownership without a password.
Smart contract frontends
User interfaces that read contract state and write transactions through contract calls.
NFT minting
The process of creating a new unique token and recording its metadata on the blockchain.
NFT marketplace interactions
Listing, bidding, buying, and delisting flows that connect storefronts to marketplace contracts.
Testnet integration
Wiring a frontend to test-network contracts and faucets so flows can be tested without real funds.
Gas and confirmation UX
Interface patterns that explain fees, pending states, and confirmations so users understand transaction progress.
Keep going

Fix, check, and go deeper.

Troubleshooting & common mistakes

Wallet connection drops or shows the wrong network

Detect the chain ID on load, prompt a network switch, and re-initialize the contract instances.

Transaction stays pending and never confirms

Check testnet gas price and nonce queue, then speed up or cancel and resubmit with updated fees.

Signature login succeeds but session does not persist

Verify the signed message, nonce expiry, and session storage handling, then fix nonce reuse.

NFT metadata or images fail to load

Validate the token URI and metadata JSON schema, then fix gateway URLs and add a fallback renderer.

Contract reads return stale data after a write

Wait for confirmation receipts before refreshing, then re-fetch state from the node instead of cache.

Before you move on, you should be able to

  • Explain how wallets, keys, and signatures enable Web3 interaction
  • Build wallet-connected frontends with transaction signing flows
  • Design decentralized identity and authentication using signatures
  • Build NFT minting, listing, and marketplace interactions
  • Deploy Web3 frontends with testnet contract integrations
  • Evaluate transaction UX for fees, pending states, and errors
  • Deploy frontend updates that track contract address and ABI changes
Apply

Start your application.

Share a few details and a HIGAET advisor will reach out within one business day with next steps.

FAQ

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