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 advanced Solidity expertise, 70% of smart contracts suffer hacks costing an average of 3M€ (source Chainalysis 2023), overpaid gas climbs to +40% impacting DeFi ROI, missed audits expose teams to irreversible losses like Poly Network (600M$), impossible upgrades block progress, trained competitors capture 80% of high-value contracts, and careers stagnate against explosive demand (salaries +25%).
Invest now or risk obsolescence.
Dive into refactoring existing contracts, analyze gas with Hardhat benchmarks, implement storage packing and assembly to halve costs, perform exercises on real DeFi cases, produce an optimized deliverable ready for immediate deployment, while mastering the latest Solidity 0.8.24 features.
Identify reentrancy, flash loans, and oracle manipulation using Slither, simulate attacks on your own contracts, code custom guards and emergency stops, analyze 10 famous hacks like Ronin, generate a complete audit report as a deliverable, boost your expertise for bulletproof contracts.
Deploy UUPS and transparent proxies with OpenZeppelin, migrate live contracts without downtime, integrate Arbitrum/Optimism to scale, code minimalist factories and clones, test in workshop on production scenarios, deliver a functional upgradable pattern, propel your projects towards industrialization.
Master fuzzing and invariants with Foundry, integrate secure Chainlink oracles, deploy via Gnosis multisig, configure Tenderly alerts for anomalies, simulate mainnet forks for realistic tests, produce a complete monitoring dashboard, finalize with a peer-review audit, ready for your critical missions.
The Solidity Expert Training - Develop Impenetrable Smart Contracts 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 Solidity Expert Training - Develop Impenetrable Smart Contracts 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 Solidity Expert Training - Develop Impenetrable Smart Contracts 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
Pentesting & ethical hackingIndustry-certified
Blockchain & Web3Industry-certified
Security standards & governanceIndustry-certified
Blockchain & Web3Industry-certified
Blockchain & Web3Industry-certified
Blockchain & Web3Industry-certified
Blockchain & Web3Industry-certified
Blockchain & Web3Industry-certified
Blockchain & Web3Industry-certified
Pentesting & ethical hackingIndustry-certified
Pentesting & ethical hackingIndustry-certified
Pentesting & ethical hackingIndustry-certified
Pentesting & ethical hackingIndustry-certified
Pentesting & ethical hackingIndustry-certified
Pentesting & ethical hackingIndustry-certified
Storage & backupIndustry-certified
Storage & backupIndustry-certified
Storage & backupIndustry-certified
Storage & backupIndustry-certified
Storage & backupIndustry-certified
Storage & backupIndustry-certified
Cybersecurity fundamentalsIndustry-certified
Cybersecurity fundamentalsIndustry-certified
Cybersecurity fundamentalsIndustry-certified
Cybersecurity fundamentalsIndustry-certified
Cybersecurity fundamentalsIndustry-certified
Cybersecurity fundamentalsIndustry-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.