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Training Web3.js 2026 - Developing Scalable Blockchain dApps

Ref: CCC307
10 people max.
6125€ 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 Web3.js 2026 to interact with Ethereum layer 2 networks in a corporate environment
  • Develop scalable and secure production-ready dApps with professional skills
  • Implement advanced smart contracts via Web3.js for blockchain projects
  • Optimize Web3.js transactions for certified production performance
  • Design Web3.js interfaces connected to oracles and decentralized wallets
  • Deploy Web3.js 2026 applications in multi-chain certified environments
  • Integrate advanced Web3.js state management for smooth user experiences

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.

Fouzi Benzidane
Fouzi Benzidane

Learni Trainer · Expert

73%productivity gap
×3cost of inaction

Program

Module 1Web3.js 2026: Advanced Architecture and Multi-Network Setup (Ethereum L2, Hybrid Ethers.js Tools)

Dive into the evolution of Web3.js toward 2026 with installation of compatible environments for Polygon and Optimism, configuration of multiple providers for professional resilience, exploration of extended APIs for V6 smart contracts, practical exercises on connecting to Infura/Alchemy nodes, creation of a first scalable blockchain interaction script, unit tests with Mocha to validate live connections, and generation of an enterprise-ready setup report.

Module 2Web3.js 2026: Advanced Transaction Management and Gas Optimization (ABIs, Signers, Batching)

Master Web3.js 2026 transactions by managing dynamic ABIs for complex contracts, implement hardware signers like Ledger for certified security, optimize gas via batching and predictive estimates, practice on real DeFi cases with Uniswap V4 swaps, develop a real-time fee monitoring module, simulate network congestion scenarios, and produce an immediately applicable production blockchain optimization toolkit.

Module 3Web3.js 2026: Smart Contract Interactions and Events (Events, Filters, Multisig)

Deepen Web3.js calls to ERC-721/1155 smart contracts and DAO governance, set up event listeners for real-time streaming, deploy advanced filters on historical logs, integrate Gnosis multisig wallets for enterprise approvals, conduct exercises on live contract audits via Etherscan, build a custom events dashboard, and document reusable patterns to accelerate professional Web3 developments.

Module 4Web3.js 2026: Oracle and Cross-Chain Integration (Chainlink, Bridges, LayerZero)

Integrate Web3.js 2026 with Chainlink oracles for reliable DeFi price feeds, configure cross-chain bridges like Wormhole for multi-network transfers, implement LayerZero protocols for inter-chain messaging, test on real arbitrage scenarios, develop an automated relayer with smart retries, analyze latency and security via simulations, and generate a scalable enterprise-ready cross-chain dApp prototype.

Module 5Web3.js 2026: Production Deployment and Advanced Security (VPC, Audits, Monitoring)

Finalize your Web3.js 2026 expertise by deploying dApps on Vercel/Netlify with IPFS pinning, strengthen security against reentrancy and frontrunning via advanced guards, integrate monitoring with The Graph and Tenderly, perform automated Slither audits, build a complete red-thread project with GitHub Actions CI/CD, present your dApp in a live defense, and receive a professional blockchain skills certificate.

Evaluation method

  • Technical MCQ on Web3.js 2026 and its advanced APIs
  • Evaluation through a red-thread project of a cross-chain dApp
  • Individual code review and security audit by the expert trainer

Learning method

  • Live sessions led by a Web3.js expert active since 2018
  • Practical exercises on real Ethereum and Polygon testnets
  • Evolving red-thread project integrating all Web3.js 2026 skills
  • Digital course materials + GitHub templates for quick enterprise reuse

Methods, materials and delivery

The Training Web3.js 2026 - Developing Scalable Blockchain dApps 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 - Developing Scalable Blockchain dApps 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 - Developing Scalable Blockchain dApps 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

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TomFormation AWS — Cloud Practitioner
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« 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
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« la formation dev etait intense mais grave bien. merci Anthony Khelil »

NolanDWWM - Développeur Web et Web Mobile
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AmbreDWWM - Développement Web & Mobile React
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« bien 👍 »

Léo BlanchardFormation AWS — DevOps Engineer Professional
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« 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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