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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.
10 spots per session maximum — 8 already taken
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Don't let this gap widen
Without mastery of Ethereum blockchain integration with Web3.js, developers routinely face transaction reverts, gas inefficiencies, and exploitable vulnerabilities in DApps.
Blockchain security reports reveal that 82% of Ethereum exploits—totaling $3.8 billion lost in 2022—stem directly from integration errors, averaging $1.2 million per incident for affected firms.
These failures not only inflate project costs by 40% and trigger regulatory fines up to $500,000 but also undermine company competitiveness in the $2 trillion Web3 market.
Every month without this expertise risks permanent career stagnation as blockchain adoption surges.
The Mastering Ethereum Blockchain Integration with Web3.js: Develop Your First 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.
To ensure the quality of the Mastering Ethereum Blockchain Integration with Web3.js: Develop Your First DApps training, Learni provides the following 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.
The assessment of skills acquired during the Mastering Ethereum Blockchain Integration with Web3.js: Develop Your First DApps training is carried out through:
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.
Learni training programs are available for inter-company and intra-company settings, both in-person and remote. Registration is possible up to 48 business hours before the start of training. Our programs are eligible for OPCO, Pôle emploi, and FNE-Formation funding. Contact us to discuss your training project and funding possibilities.
History and key concepts of blockchain. Understanding Ethereum, smart contracts, and DApps. Presentation of Web3.js and its role in the ecosystem. Architecture of a decentralized application.
Installation and setup of the environment (Node.js, npm, Ganache). Exploring Web3.js APIs. Connecting to a node (local/testnet/mainnet). Managing accounts, reading balances, sending simple transactions.
Writing a simple smart contract in Solidity. Deploying a contract on a local or testnet network. Using Web3.js to deploy, call functions, listen to events. Handling returns and errors.
Structuring a web application integrating Web3.js (frontend: React, Vue, or vanilla JS). Managing wallet connection (Metamask). Reading and writing to the blockchain from the browser. Securing interactions and best practices.
Handling practical cases: decentralized voting, simple wallet, basic NFT. Analysis of common vulnerabilities. Filtering and fine-grained event management. Optimizing calls and transaction costs (gas).
Target audience
Web developers, software engineers, IT project managers wishing to integrate the Ethereum blockchain into their applications
Prerequisites
Mastery of JavaScript and basics of web development
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