Flag of the United StatesBuilt for US teams
Payment by wire transferEnhanced confidentialityPerfect for companies with 50 to 500 employeesScheduling to fit any time zone

1 seat held for the next session

30:00Held for another

Request a call back and an advisor reaches you within 24 business hours, Monday to Saturday.

Training Ethers.js - Developing Scalable Ethereum dApps

Ref: HKR884
10 people max.
From $5,775 HT / per person
In-company rate from 2 attendees: from $10,395 for the whole teamUp to 8 attendees for less than the price of 2 individual seats.
On-site on request · +$540 with certification exam
5 days
Onsite

Don't let this gap widen

Why this program matters

  • Without mastery of Ethers.js in 2026, your gas-guzzler dApps cost 5x more in fees, with 68% of DeFi hacks (2.5B$ lost in 2024) stemming from poor contract interactions.

  • Non-expert teams waste 50% of their time debugging RPC and events, delaying critical Layer 2 launches.

  • In 2026, 82% of blockchain jobs demand advanced Ethers.js, putting you at risk of forced career shifts or salary stagnation.

  • Every quarter without expert skills leaves your company exposed to missed audits and massive competitive losses.

Imed BEN AMOR, Learni trainer · Development expert
Imed BEN AMOR

Learni trainer · Development expert

73%productivity gap
×3cost of inaction

Share in 2 clicks

Trusted by — schools, companies and industrial groups
Aptar
ArcelorMittal
Equans
EDF
Ubisoft
Microsoft
Aptar
ArcelorMittal
Equans
EDF
Ubisoft
Microsoft
Aptar
ArcelorMittal
Equans
EDF
Ubisoft
Microsoft
Aptar
ArcelorMittal
Equans
EDF
Ubisoft
Microsoft
Aptar
ArcelorMittal
Equans
EDF
Ubisoft
Microsoft
Aptar
ArcelorMittal
Every program built with a dedicated engineer
OpenAI
Anthropic
Mistral AI
NVIDIA
Google
Amazon Web Services
Microsoft Dynamics 365
Salesforce
ServiceNow
SAP
Oracle
Cisco
Fortinet
Palo Alto Networks
Aruba
VMware
Red Hat
Databricks
Snowflake
OVHcloud
Notion
AMD
Apple
OpenAI
Anthropic
Mistral AI
NVIDIA
Google
Amazon Web Services
Microsoft Dynamics 365
Salesforce
ServiceNow

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
A child walking to school with a backpack
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
Enroll and offer a kit

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 Ethers.js in 2026, your gas-guzzler dApps cost 5x more in fees, with 68% of DeFi hacks (2.5B$ lost in 2024) stemming from poor contract interactions.

  • Non-expert teams waste 50% of their time debugging RPC and events, delaying critical Layer 2 launches.

  • In 2026, 82% of blockchain jobs demand advanced Ethers.js, putting you at risk of forced career shifts or salary stagnation.

  • Every quarter without expert skills leaves your company exposed to missed audits and massive competitive losses.

Imed BEN AMOR, Learni trainer · Development expert
Imed BEN AMOR

Learni trainer · Development 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, 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

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.

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.

FAQ

Frequently asked questions

Which tools are used in Ethers.js training?+
Hands-on work runs on hardhat, alchemy, infura, multicall, fragments and filters. Those tools come from the Ethers.js program itself, delivered on site over 5 days, so participants practise on the stack they will use at work.
What can participants do after Ethers.js training?+
They can master Ethers.js v6+ for professional, certified blockchain interactions, develop scalable dApps with advanced provider and wallet management and implement complex smart contracts via ABI and multicall in enterprise settings. Those are the stated objectives of the Ethers.js program at Expert level, checked by the end-of-session assessment.
What does the Ethers.js program cover, day by day?+
Day 1: Ethers.js: Advanced Providers and Wallets Configuration (Hardhat, Alchemy, Infura). Day 2: Ethers.js: Smart Contract Interactions and ABI Management (Multicall, Fragments). Day 3: Ethers.js: Advanced Event Management and Listeners (Filters, Backfills). Day 4: Ethers.js: Layer 2 Optimizations and Gas Efficiency 2026 (Optimism, Arbitrum, EIP-4844). Day 5: Ethers.js: Security, Account Abstraction, and Production Deployment (EIP-4337, Audits). The Ethers.js program runs over 5 days, delivered on site.
How is Ethers.js training assessed?+
Assessment relies on expert multiple-choice quiz on Ethers.js and Ethereum 2026 protocols, evaluation through capstone dApp deployment project and oral defense and code audit by the certified trainer. Learni issues a completion certificate together with the individual assessment report at the end of the Ethers.js program, which an L&D team can file as evidence.
How much does Ethers.js training cost per participant?+
$5,775 (USD) per participant. A detailed quote is sent within one business day, and team pricing applies from the second participant.
How long does Ethers.js training take?+
5 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 Ethers.js 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 Ethers.js training?+
Advanced mastery of JavaScript, Solidity, Web3.js, and deployments on Ethereum testnets.
Is a certificate issued after Ethers.js 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.
On-site & remote

This training across cities

Available on-site and remotely. Pick your city to see the local training center.

Your professional training, anywhere

Let's build
your next
program.

30 minutes with a learning advisor. No commitment. No sales pitch dressed up as a demo.

Reply within 24h · Vetted experts · USD invoicing · W-9 available