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.
Describe your need, get a tailored program and a pre-filled quote in 3 min. A 100% free call with an advisor.
1 seat held for the next session
Request a call back and an advisor reaches you within 24 business hours, Monday to Saturday.

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.
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
Without Ethers.js 2026 mastery, your dApp gas fees surge 50% on L2, driving 200k€ in annual losses per poorly optimized DeFi protocol.
Hacks from mismanaged transactions cost 3,7 milliards$ in 2024 according to Chainalysis, with 68% tied to obsolete libs.
In companies, teams lacking expert skills lose 40% of Web3 deals to scalable competitors.
Every quarter without training widens the gap, risking career obsolescence and blockchain GDPR fines.
Act now to secure and scale your projects.
In-depth configuration of Ethers.js providers for Ethereum mainnet and L2s like Optimism and Arbitrum, hands-on with Alchemy and Infura APIs for ultra-fast queries, connecting to deployed contracts via JSON ABI, practical exercises on reading/writing real-time events, developing a custom blockchain monitoring listener, real enterprise case with DeFi protocol simulation, production of a reusable automated script with expert trainer code review.
Implementation of ERC-4337 Account Abstraction for gasless wallets and batch transactions, ENS integration for decentralized domain resolutions, gas optimization with multicall and EIP-1559, exercises on bundlers and paymasters for smooth user experience, deployment of a complete dApp on testnet with Tenderly monitoring, real enterprise cases in NFT marketplaces and yield farming, finalization of the red thread project with advanced security tests, deliverables including interactive dashboard and production-ready professional documentation.
The Training Ethers.js 2026 - 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.
For the smooth delivery of the Training Ethers.js 2026 - Developing Scalable Ethereum dApps program, the following equipment is required:
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.
Assessment of skills acquired during the Training Ethers.js 2026 - Developing Scalable Ethereum dApps program is performed through:
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.
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.
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.
Each trainer is validated on three criteria: hands-on field expertise, proven pedagogy and alignment with your industry.
30-minute video call between you and the selected trainer to validate the fit, adjust content and clear any final doubts.
No recycled slides. The syllabus is reworked from your real cases: tools, constraints, vocabulary, ongoing projects.
Live evaluations, 30/90/180-day check-ins and a consolidation plan. If the impact misses the mark, we rework it.
A simple promise: you don't pay to discover the trainer on day one. Everything is validated upfront, by you.
Blockchain & Web3Industry-certified
Blockchain & Web3Industry-certified
Blockchain & Web3Industry-certified
Blockchain & Web3Industry-certified
Blockchain & Web3Industry-certified
Blockchain & Web3Industry-certified
Storage & backupIndustry-certified
Storage & backupIndustry-certified
Storage & backupIndustry-certified
Social mediaIndustry-certified
Social mediaIndustry-certified
Social mediaIndustry-certifiedAvailable on-site and remotely. Pick your city to see the local training center.
30 minutes with a learning advisor. No commitment. No sales pitch dressed up as a demo.
We will call +1 (United States) 🇺🇸 — change the country code on the left if your number is from elsewhere.