Rigorous trainer selection
Each trainer is validated on three criteria: hands-on field expertise, proven pedagogy and alignment with your industry.
- Triple validation: technical, pedagogical, sectoral.
- Minimum rating 4.8/5 over the last 12 sessions.
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Request a call back and an advisor reaches you within 24 business hours, Monday to Saturday.
Training Web3.js: Mastering Blockchain Application Development
Trusted by — schools, companies and industrial groups
Every program built with a dedicated engineer
Learning objectives
- Understand the functioning of the Ethereum blockchain
- Get hands-on with the Web3.js library
- Connect a front-end application to the blockchain via Web3.js
- Interact with smart contracts from a web interface
- Deploy and manipulate simple smart contracts
- Manage transactions, accounts, and events
- Secure interactions and understand best practices
Our social commitment
A school kit donated to a child for every training booked
To fight inequalities in access to education, Learni donates a complete school kit to a child in need for every training booked. You build your skills, a child heads back to school.
- Backpack, notebooks and essential supplies
- Distributed through our partner charities
- Included, at no extra cost to you
The Learni story
Founded by engineers and learning experts, Learni's mission is to make high-impact tech training accessible to teams everywhere. We work remotely with organizations across the US and Canada, in your time zone, to help teams upskill fast.
Don't let this gap widen
Why this program matters
Without mastery of Web3.js, your Ethereum dApps remain vulnerable to blockchain interaction flaws that caused 70% of the hacks recorded in 2023.
A single error costs an average of 1,5 million d'euros in direct losses and corrective audits, blocking deployment of critical projects.
Companies without expertise lose 40% of market share to Web3-agile competitors, risking collapse of their innovation pipeline.
Each quarter of inaction widens the competitive gap and threatens your employability in decentralized IT.
Program
Module 1Introduction to Ethereum Blockchain and Web3.js
Understand the fundamentals of blockchain and Ethereum, explore concepts of transactions, blocks, and smart contracts. Install the development environment, present Web3.js, install via npm, get hands-on with the main methods.
Module 2Fundamental Interactions with Web3.js
Connect to an Ethereum network (mainnet, testnet, local), manage accounts (MetaMask, private keys), access balances, create and send transactions, monitor and verify status via Web3.js.
Module 3Advanced Smart Contracts and Front-End Integration
Deploy smart contracts in Solidity via Web3.js, write interaction scripts, manage events, listen to logs, integrate a dApp connected to Ethereum (React.js + Web3.js), security strategy for Web3 applications.
Evaluation method
- End-of-training evaluation quiz
- Practical workshop developing a mini dApp interacting with a smart contract
- Individual correction and personalized feedback
Learning method
- Alternating theory and practice with concrete workshops
- Real-world case studies (NFTs, ERC-20 tokens, crowdfunding)
- Access to a project repository and enriched documentation
Methods, materials and delivery
The Training Web3.js: Mastering Blockchain Application Development program is delivered onsite or remote (blended-learning, virtual classroom, remote presence). At Learni, an industry-certified training organization, every program is built to maximize skills acquisition regardless of the chosen format.
The trainer alternates between demonstrative, interrogative and active methods (through hands-on labs and/or scenarios). This pedagogical approach guarantees concrete learning that's immediately applicable at work.
Equipment required
For the smooth delivery of the Training Web3.js: Mastering Blockchain Application Development program, the following equipment is required:
- Mac or PC computers, high-speed fiber internet, whiteboard or flipchart, projector or interactive touch screen (for remote sessions)
- Training environments installed on workstations or accessible online
- Course materials, hands-on exercises and complementary resources
- Post-training access to materials and educational resources
For intra-company training on a site outside Learni, the client commits to providing all required teaching materials (computers, internet, etc.) for the smooth delivery of the program in line with the prerequisites in the communicated program.
* contact us for remote delivery feasibility** ratio varies depending on the program
Skills assessment methods
Assessment of skills acquired during the Training Web3.js: Mastering Blockchain Application Development program is performed through:
- During training: case studies, hands-on labs and professional scenarios
- End of training: self-assessment questionnaire and skills evaluation by the trainer
- After training: completion certificate detailing acquired skills
Program accessibility
Learni is committed to making its programs accessible. All our programs are accessible to people with disabilities. Our teams are available to adapt the pedagogical methods to your specific needs. Please contact us for any adjustment request.
Enrollment terms and lead times
Registration is possible up to 48 business hours before the start of training. All our programs are built for corporate L&D budgets and delivered onsite or remotely.
Our method
Training quality, guaranteed at every step
Before, during, after: we frame the brief, introduce the trainer, tailor the content and measure impact. You stay in control from kickoff to wrap-up.
You meet the trainer beforehand
30-minute video call between you and the selected trainer to validate the fit, adjust content and clear any final doubts.
- Live briefing on goals and team context.
- Veto right — we swap the trainer for free if needed.
Content tailored to your context
No recycled slides. The syllabus is reworked from your real cases: tools, constraints, vocabulary, ongoing projects.
- Hands-on cases drawn from your stack and projects.
- Program co-written then validated by your team.
Continuous quality follow-up
Live evaluations, 30/90/180-day check-ins and a consolidation plan. If the impact misses the mark, we rework it.
- NPS, knowledge quizzes and skills self-assessment.
- Satisfaction guarantee: fully satisfied or free rework.
A simple promise: you don't pay to discover the trainer on day one. Everything is validated upfront, by you.
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FAQ
Frequently asked questions
What can participants do after Web3.js: Mastering Blockchain Application Development training?+
They can understand the functioning of the Ethereum blockchain, get hands-on with the Web3.js library and connect a front-end application to the blockchain via Web3.js. Those are the stated objectives of the Web3.js: Mastering Blockchain Application Development program at Intermediate level, checked by the end-of-session assessment.
What does the Web3.js: Mastering Blockchain Application Development program cover, day by day?+
Day 1: Introduction to Ethereum Blockchain and Web3.js. Day 2: Fundamental Interactions with Web3.js. Day 3: Advanced Smart Contracts and Front-End Integration. The Web3.js: Mastering Blockchain Application Development program runs over 3 days, delivered on site.
How is Web3.js: Mastering Blockchain Application Development training assessed?+
Assessment relies on end-of-training evaluation quiz, practical workshop developing a mini dApp interacting with a smart contract and individual correction and personalized feedback. Learni issues a completion certificate together with the individual assessment report at the end of the Web3.js: Mastering Blockchain Application Development program, which an L&D team can file as evidence.
How much does Web3.js: Mastering Blockchain Application Development training cost per participant?+
$3,465 (USD) per participant. A detailed quote is sent within one business day, and team pricing applies from the second participant.
How long does Web3.js: Mastering Blockchain Application Development training take?+
3 days, available live online (US time zones) or on-site at your offices. Half-day tracks spread over several weeks are possible so the team stays operational.
Who pays for Web3.js: Mastering Blockchain Application Development training?+
Most US teams pay directly through their company L&D or training budget. Learni invoices in US dollars and accepts bank transfer (ACH/wire) or card, with volume pricing for teams. A purchase order is welcome.
What do participants need to know before Web3.js: Mastering Blockchain Application Development training?+
Mastery of JavaScript and knowledge of web development basics.
Is a certificate issued after Web3.js: Mastering Blockchain Application Development training?+
Yes. A Learni completion certificate is issued, along with the individual evaluation report. Learni is a certified training provider and prepares for third-party certifications, but does not award them itself.
Does Learni provide the equipment for Web3.js: Mastering Blockchain Application Development training?+
No. A computer and a stable internet connection are required for each participant. Learni provides the learning platform, the trainer and all course materials.
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