Is the training Qualiopi certified?

Yes, Learni is a Qualiopi-certified training organization. This certification guarantees the quality of our courses and enables funding through OPCO and other mechanisms.

What is the duration of the Training Web3.js - Master Advanced Blockchain dApps training?

The Training Web3.js - Master Advanced Blockchain dApps training takes place over 28 hours. The program is structured in progressive modules for optimal skill development.

How can I fund my training?

Our courses are eligible for OPCO funding. Learni supports you through the funding process. A personalized quote is available upon request.

What are the prerequisites for this training?

The prerequisites for the Training Web3.js - Master Advanced Blockchain dApps training are: Mastery of JavaScript ES6+, advanced Solidity experience, routine use of basic Web3.js, Ethereum RPC APIs, Node.js. A preliminary interview validates your eligibility.

Is the training available in person?

Yes, the Training Web3.js - Master Advanced Blockchain dApps training is available in in-person. The format can be adapted to your needs (inter, intra, custom).

Training Web3.js - Master Advanced Blockchain dApps | Learni

The story of Learni

Founded by passionate advocates of learning and innovation, Learni set out to make professional training accessible to everyone, everywhere in the world. Our team works in the largest cities such as Paris, Lyon, Marseille, and internationally, to support talents and organizations in their skills development.

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Methods, approaches, and teaching resources

The Training Web3.js - Master Advanced Blockchain dApps training is delivered in-person or remotely (blended-learning, e-learning, virtual classroom, remote in-person). At Learni, a Qualiopi-certified training organization, each program is designed to maximize skills acquisition, regardless of the training mode chosen.

The trainer alternates between demonstrative, interrogative, and active methods (through practical exercises and/or real-world scenarios). This pedagogical approach ensures concrete and directly applicable learning in the workplace.

Teaching resources provided

To ensure the quality of the Training Web3.js - Master Advanced Blockchain dApps training, Learni provides the following teaching resources:

Mac or PC computers, high-speed fiber internet, whiteboard or flipchart, video projector or interactive touchscreen (for remote sessions)
Training environments installed on workstations or accessible online
Course materials, practical exercises, and supplementary resources
Post-training access to materials and teaching resources

For in-house training at a location external to Learni, the client ensures and commits to having all necessary teaching materials (IT equipment, internet connection...) for the proper conduct of the training action in accordance with the prerequisites indicated in the communicated training program.

* contact us for remote feasibility** ratio varies depending on the training followed

Assessment methods

The assessment of skills acquired during the Training Web3.js - Master Advanced Blockchain dApps training is carried out through:

During training: case studies, practical exercises, and professional scenarios
At the end of training: self-assessment questionnaire and skills evaluation by the trainer
After training: training completion certificate detailing acquired skills

Training accessibility

Learni is committed to the accessibility of its professional training programs. All our training programs are accessible to people with disabilities. Our teams are available to adapt teaching methods to your specific needs. Do not hesitate to contact us for any accommodation request.

Training access terms and deadlines

Training objectives

Integrate Web3.js with multiple providers for robust blockchain connections

Develop complex smart contract interactions via ABI and batched transactions

Manage events and real-time subscriptions for reactive dApps

Optimize performance and gas fees in mainnet/testnet environments

Secure wallets and programmatic signatures against common attacks

Debug and monitor Web3.js calls with advanced tools like Tenderly

Build scalable, production-ready decentralized dApp prototypes

Training program

Module 1Advanced Integration: Web3.js Providers, Multi-Chain Connections (Infura, Alchemy, Hardhat)

Dive into expert Web3.js configuration, install hybrid providers, code resilient connections to Ethereum and L2, perform exercises on dynamic network switching, generate deliverables like a reusable provider manager, test live on Sepolia to validate immediate robustness and scalability.

Module 2Smart Contracts: Advanced ABI Calls, Batch Transactions, Multisig

Master custom ABI encoding/decoding, deploy contracts via Web3.js, simulate batch tx for gas savings, practice real DeFi cases with Uniswap V3, produce contract migration scripts, analyze tx logs in depth, leave with a production-ready interaction toolkit.

Module 3Real-Time Events: Web3.js Subscriptions, TheGraph-like Indexing

Set up websockets for live events, code custom filters on blocks/transactions, integrate with React for reactive dApps, exercise on NFT marketplace events, optimize polling vs subscriptions, create custom monitoring dashboards, take away ultra-high-performance functional prototypes.

Module 4Security and Optimization: ENS Wallets, Gas Profiling, Advanced Debugging

Implement EIP-712 signatures, integrate secure MetaMask/WalletConnect, profile gas with hybrid ethers.js, debug via Truffle/Ganache, simulate reentrancy attacks, finalize complete DeFi dApp project, leave certified with pro portfolio and access to shared GitHub repo.