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 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.
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.
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.
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.
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.
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.
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.
For the smooth delivery of the Training Ethers.js - 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 - 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.