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.
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.
Trusted by — schools, companies and industrial groups
Every program built with a dedicated engineer
Learning objectives
- Master Ethers.js for interacting with production smart contracts
- Develop professional dApps connected to EVM blockchains
- Implement secure wallet management and transactions with Ethers.js
- Optimize ABI calls and events for scalable applications
- Design advanced integrations with providers like Alchemy and Infura
- Deploy contracts and test in a certified enterprise environment
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 Ethers.js, 80% of dApps fail due to poorly managed transactions, costing an average of 500k€ per incident in lost gas or hacks.
Teams without advanced skills lose 3 months on every blockchain integration, while 65% of DeFi audits reveal vulnerabilities tied to poor JS libs.
In 2026, 90% of Web3 jobs will require Ethers.js, sidelining outdated profiles and stalling company growth against scalable competitors.
Program
Module 1Ethers.js Fundamentals: Providers and Blockchain Connections (Alchemy, Infura, Hardhat)
Installation and configuration of Ethers.js in a professional Node.js project, connection to providers like Alchemy or Infura to interact with Ethereum mainnet and testnets, exploration of Provider and Signer objects via practical exercises on reading balances and blocks, setup of a development environment with Hardhat for local testing, creation of reusable scripts for quick enterprise audits.
Module 2Ethers.js Contract Management: ABI, Calls, and Transactions (ethers.Contract, multicall)
Loading compiled ABIs to interact with deployed smart contracts, performing read-only and write calls via ethers.Contract on concrete DeFi cases, transaction management with gas estimation and automatic nonce to avoid costly failures, implementation of multicall to optimize batch calls, exercises on an ongoing NFT marketplace dApp project, production of detailed logs and real-time debugging.
Module 3Ethers.js Wallets and Events: Security and Monitoring (Wallet, EventFilter)
Creation and connection of HD wallets with ethers.Wallet for signing secure transactions, integration of MetaMask via ethers.providers.Web3Provider in React interfaces, filtering and listening to blockchain events with EventFilter for real-time monitoring, development of robust listeners resilient to lost reconnections, practical cases on automated trading alerts, security enhancement with encrypted private keys and simulation of common attacks.
Module 4Advanced Ethers.js: Optimization and Deployment (ENS, IPFS, upgrades)
Use of Etherscan-like APIs and ENS for decentralized name resolutions, IPFS integration for scalable off-chain metadata storage, optimization of upgradable contracts with ethers.UpgradeableContract, end-to-end testing on Polygon and Optimism, automated deployment via CI/CD scripts, finalization of the ongoing project with an interactive dashboard, code review, and enterprise implementation plan for certified production.
Evaluation method
- Technical multiple-choice quiz on Ethers.js and blockchain interactions
- Practical assessment via the ongoing dApp project
- Oral presentation of secure implementations to the trainer
Learning method
- Training by an expert Web3 trainer actively involved in operations
- Hands-on exercises on real blockchain enterprise cases
- Ongoing project over 4 days with continuous feedback
- Comprehensive learning materials and source code provided
Methods, materials and delivery
The Training Ethers.js - Develop 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 - Develop 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 - Develop 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.
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
Which tools are used in Ethers.js training?+
Hands-on work runs on alchemy, infura, hardhat, ethers.Contract, multicall and wallet. Those tools come from the Ethers.js program itself, delivered on site over 4 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 for interacting with production smart contracts, develop professional dApps connected to EVM blockchains and implement secure wallet management and transactions with Ethers.js. Those are the stated objectives of the Ethers.js program at Intermediate level, checked by the end-of-session assessment.
What does the Ethers.js program cover, day by day?+
Day 1: Ethers.js Fundamentals: Providers and Blockchain Connections (Alchemy, Infura, Hardhat). Day 2: Ethers.js Contract Management: ABI, Calls, and Transactions (ethers.Contract, multicall). Day 3: Ethers.js Wallets and Events: Security and Monitoring (Wallet, EventFilter). Day 4: Advanced Ethers.js: Optimization and Deployment (ENS, IPFS, upgrades). The Ethers.js program runs over 4 days, delivered on site.
How is Ethers.js training assessed?+
Assessment relies on technical multiple-choice quiz on Ethers.js and blockchain interactions, practical assessment via the ongoing dApp project and oral presentation of secure implementations to the 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?+
$4,620 (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?+
4 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?+
Mastery of JavaScript ES6+, basic knowledge of Solidity, and Ethereum fundamentals.
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.
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