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Training Ethers.js - Developing Scalable Ethereum dApps

Ref: HKR884
10 people max.
7000€ 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 Ethers.js v6+ for professional, certified blockchain interactions
  • Develop scalable dApps with advanced provider and wallet management
  • Implement complex smart contracts via ABI and multicall in enterprise settings
  • Optimize Ethers.js transactions for Layer 2 and gas efficiency
  • Design robust event systems with filters and listeners
  • Deploy secure decentralized applications in 2026 production environments
  • Acquire expert skills in Account Abstraction and EIP-4337

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 1Ethers.js: Advanced Providers and Wallets Configuration (Hardhat, Alchemy, Infura)

Dive into Ethers.js 2026 installation with JSON-RPC and WebSocket providers, configure HD wallets and private signers for multi-chain environments, perform practical exercises on Sepolia and Goerli testnets, integrate custom RPCs via Alchemy, test resilience with automatic fallbacks, and produce an enterprise-ready development setup with initial deployment scripts.

Module 2Ethers.js: Smart Contract Interactions and ABI Management (Multicall, Fragments)

Master contract reading and writing via Contract instances, parse dynamic ABIs and fragments for flexible deployments, implement batched calls with Multicall3 for gas optimization, develop exercises on real ERC-721/1155 contracts, simulate cross-chain transactions, generate automated wrappers, and validate transactions in simulation before broadcast.

Module 3Ethers.js: Advanced Event Management and Listeners (Filters, Backfills)

Configure topic-based event filters for real-time monitoring, implement persistent listeners with backfill on archive nodes, process complex logs via decoded interfaces, practice on DEXs like Uniswap V4, analyze high-frequency data streams, develop an interactive event dashboard, and optimize memory usage for enterprise-scale applications.

Module 4Ethers.js: Layer 2 Optimizations and Gas Efficiency 2026 (Optimism, Arbitrum, EIP-4844)

Integrate Ethers.js with Optimism and Arbitrum rollups via L1/L2 bridges, master EIP-4844 blobs for low-cost data availability, profile and bundle transactions for up to 90% gas savings, exercise on real bridges like Hop Protocol, simulate MEV attacks and mitigations, and produce a plug-and-play optimization module for existing dApps.

Module 5Ethers.js: Security, Account Abstraction, and Production Deployment (EIP-4337, Audits)

Deploy EntryPoints for AA wallets via EIP-4337, integrate UserOperations and bundlers, audit Ethers.js code against reentrancy and frontrunning, practice mainnet deployments with Tenderly monitoring, finalize a complete capstone dApp project, generate security reports and monitoring plans, and prepare for professional certification with expert code review.

Evaluation method

  • Expert multiple-choice quiz on Ethers.js and Ethereum 2026 protocols
  • Evaluation through capstone dApp deployment project
  • Oral defense and code audit by the certified trainer

Learning method

  • Live sessions by an active expert blockchain trainer
  • Hands-on exercises on real Ethereum enterprise cases
  • Evolving capstone project over 5 days with continuous feedback
  • Digital course materials and source code provided for life

Methods, materials and delivery

The Training Ethers.js - Developing Scalable Ethereum 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 Ethers.js - Developing Scalable Ethereum 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 Ethers.js - Developing Scalable Ethereum 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

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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