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Training Web3.js 2026 - Interacting with Ethereum and Smart Contracts

Ref: WWV580
10 people max.
5500€ HT / per person
−15% from 2 people−30% from 3 people−50% from 5 people
Pay in 3 installments · +$170/day onsite · +$500 with certification exam
5 journées
distanciel

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Learning objectives

  • Master the basics of Web3.js 2026 to connect web applications to Ethereum in certified professional training
  • Develop skills in interacting with smart contracts via Web3.js for enterprise projects
  • Implement MetaMask wallets and secure transactions with modern Web3.js libraries
  • Design reactive dApp interfaces integrating real-time blockchain data
  • Optimize Ethereum provider calls for scalable performance in professional environments
  • Deploy your first functional Web3.js dApp validating certified blockchain skills

The Learni story

Founded by passionate learning and innovation experts, Learni's mission is to make professional training accessible to everyone, anywhere in the world. Our team operates in major hubs — London, New York, Boston — and internationally, to support talents and organizations in upskilling.

Don't let this gap widen

Why this program matters

  • Without this upskilling, your team accumulates a technological gap that translates directly into productivity loss.

  • Organizations that don't train their talents on key topics see their competitiveness drop.

  • Every quarter without training is a gap widening with competitors who invest.

  • The cost of inaction quickly exceeds that of well-targeted training.

Allan Busi
Allan Busi

Learni Trainer · Expert

73%productivity gap
×3cost of inaction

Program

Module 1Web3.js 2026 Fundamentals: Installation, Providers, and Ethereum Connections (MetaMask, Infura, Node.js)

Discover quick installation of Web3.js 2026 via npm, configure providers like MetaMask and Infura to connect web apps to Ethereum mainnet or testnets, perform first blockchain calls to read block height and ETH balance, practice guided exercises in Node.js console with immediate verification, produce a deliverable basic connected script validating beginner skills in professional training.

Module 2Accounts and Transactions in Web3.js 2026: Signatures and ETH Transfers (ethers.js Compatibility, Wallets)

Dive into Ethereum account management via Web3.js 2026, sign transactions with private keys or MetaMask, send ETH on Sepolia testnets, explore gas estimation and optimized fees, perform practical peer-to-peer transfer exercises with live feedback, integrate console debugging for common errors, generate a deliverable console app managing 5 secure transactions to strengthen enterprise blockchain skills.

Module 3Smart Contract Interactions with Web3.js 2026: ABI Decoding and Calls (Remix IDE, Solidity Basics)

Learn to load contract ABIs via Web3.js 2026, call read/write functions on deployed Remix contracts, pass encoded parameters for reading balances or minting ERC20 tokens, test on local Ganache forks, implement real DeFi cases like swap simulations, correct revert errors with traces, produce a deliverable JS dashboard querying 3 live contracts to validate professional Web3 upskilling.

Module 4Events and Listeners in Web3.js 2026: Real-Time Data and Subscriptions (WebSockets, Filters)

Master event subscriptions via Web3.js 2026 on Infura WebSockets, filter ERC20 Transfer or Approval logs, integrate React frontend listeners for live blockchain updates, manage polling fallbacks for robustness, practice exercises on a dApp notifying incoming transactions, optimize with ABI event decoding, create a deliverable real-time interface tracking wallet activity to certify interactive enterprise skills.

Module 5dApp Projects with Web3.js 2026: Full-Stack Deployment and DeFi Intro (Vite, IPFS Pinning)

Build a complete Web3.js 2026 dApp connected to MetaMask, integrate a mock DeFi lending protocol, deploy Vite frontend on Vercel with IPFS-pinned backend, test end-to-end on mainnet fork, conduct pair-programming code review for security best practices, finalize portfolio project with certificate, consolidate certified skills for a professional blockchain career.

Evaluation method

  • Daily interactive quizzes on Web3.js 2026 to validate beginner learning outcomes
  • Final deployed dApp project evaluated by Qualiopi certified experts
  • Remote oral interviews assessing practical blockchain skills

Learning method

  • Active pedagogy with 70% hands-on practice on real Ethereum Web3.js exercises
  • Remote classes limited to 10 participants for personalized coaching
  • Video replays and GitHub code sources provided post-training
  • 24/7 chat support from Solidity and Web3 experts for immediate questions

Methods, materials and delivery

The Training Web3.js 2026 - Interacting with Ethereum and Smart Contracts program is delivered onsite or remote (blended-learning, e-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 2026 - Interacting with Ethereum and Smart Contracts 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 2026 - Interacting with Ethereum and Smart Contracts 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

Learni programs are available inter-company and intra-company, onsite or remote. Enrollments are possible up to 48 business hours before the program starts. Our programs are eligible for corporate funding paths. Contact us to discuss your training project and funding options.

Verified reviews

What our learners

4.9 · +100 verified reviews
★★★★★

« cool, j'ai appris des trucs »

TomFormation AWS — Cloud Practitioner
★★★★★

« j'etais perdu au debut mais Ramy Saharaoui m'a pas laché, il a pris le temps. merci vraiment »

Eva CarpentierFormation LLM en Entreprise — Claude, ChatGPT, Mistral
★★★★★

« la formation dev etait intense mais grave bien. merci Anthony Khelil »

NolanDWWM - Développeur Web et Web Mobile
★★★★★

« 😊👍 »

AmbreDWWM - Développement Web & Mobile React
★★★★★

« bien 👍 »

Léo BlanchardFormation AWS — DevOps Engineer Professional
★★★★★

« Allan Busi t'es au top, continue comme ça. formation géniale »

MargotFormation Claude & ChatGPT — Comparatif et Cas d'Usage
★★★★★

« cool, j'ai appris des trucs »

TomFormation AWS — Cloud Practitioner
★★★★★

« j'etais perdu au debut mais Ramy Saharaoui m'a pas laché, il a pris le temps. merci vraiment »

Eva CarpentierFormation LLM en Entreprise — Claude, ChatGPT, Mistral
★★★★★

« la formation dev etait intense mais grave bien. merci Anthony Khelil »

NolanDWWM - Développeur Web et Web Mobile
★★★★★

« 😊👍 »

AmbreDWWM - Développement Web & Mobile React
★★★★★

« bien 👍 »

Léo BlanchardFormation AWS — DevOps Engineer Professional
★★★★★

« Allan Busi t'es au top, continue comme ça. formation géniale »

MargotFormation Claude & ChatGPT — Comparatif et Cas d'Usage
★★★★★

« cool, j'ai appris des trucs »

TomFormation AWS — Cloud Practitioner
★★★★★

« j'etais perdu au debut mais Ramy Saharaoui m'a pas laché, il a pris le temps. merci vraiment »

Eva CarpentierFormation LLM en Entreprise — Claude, ChatGPT, Mistral
★★★★★

« la formation dev etait intense mais grave bien. merci Anthony Khelil »

NolanDWWM - Développeur Web et Web Mobile
★★★★★

« 😊👍 »

AmbreDWWM - Développement Web & Mobile React
★★★★★

« bien 👍 »

Léo BlanchardFormation AWS — DevOps Engineer Professional
★★★★★

« Allan Busi t'es au top, continue comme ça. formation géniale »

MargotFormation Claude & ChatGPT — Comparatif et Cas d'Usage
Read all reviews
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.

Step 1

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.
Step 2

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.
Step 3

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.
Step 4

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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