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Training ERC-721 - Developing Secure NFT Smart Contracts

Course created on July 27, 2026Updated on October 5, 2026

On quote$5,775

5 days
Onsite
10 people max.

Request a quote See the program

Ref: HTG136

10 people max.

On quote$5,775

In-company rate: on quotefrom $10,395 for the whole team

On-site and certification exam on quote

5 days

Onsite

Don't let this gap widen

Why this program matters

Without ERC-721 mastery, 80% of NFT contracts face rejected audits, resulting in 6-month delays and 500k€ in rework costs.
Hacks exploiting ERC-721 vulnerabilities caused 3,7 milliards $ in losses in 2022-2023 according to Chainalysis.
Your teams lose 50% productivity on buggy implementations, risking loss of Web3 market share.
Every failed project bars developers from opportunities at Binance or OpenSea.
Invest now to secure your digital assets and boost your blockchain career.

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Every program built with a dedicated engineer

Companies: Aptar, ArcelorMittal, Equans, EDF, Ubisoft and Microsoft.

Learning objectives

Master advanced ERC-721 implementation to create professional certifying NFTs
Develop optimized ERC-721 smart contracts with OpenZeppelin for enterprise use
Design metadata management and royalties for scalable Web3 projects
Integrate ERC-721 with IPFS and NFT marketplaces like OpenSea
Audit and secure ERC-721 contracts against common vulnerabilities
Deploy ERC-721 applications on testnets and Ethereum mainnet
Optimize ERC-721 skills for rapid professional deployments

Program

Module 1ERC-721 Fundamentals: Implement the standard interface with OpenZeppelin (Solidity, Hardhat)

Dive into the advanced ERC-721 interface extension using OpenZeppelin libraries for a solid and secure foundation, set up your Hardhat environment for rapid unit tests, implement core functions like balanceOf and ownerOf on real enterprise cases, perform practical minting exercises with gas optimization, and produce a first deployable and audited contract in a group to validate professional skills.

Module 2Advanced ERC-721 Token Management: Minting, Burning, and Secure Transfers (Foundry, Deployment Scripts)

Master batch minting and conditional burning mechanisms in ERC-721 for dynamic NFT collections, use Foundry for advanced fuzzing tests and attack simulations, develop automated deployment scripts with customizable parameters, apply these skills to a red thread enterprise project like an NFT gallery, optimize events for perfect indexing on Etherscan, and end with a collaborative code review to boost your professional blockchain skills.

Module 3Metadata and Royalties in ERC-721: Integrate ERC-2981 and Dynamic URIs (IPFS, Pinata)

Integrate advanced JSON metadata with dynamic tokenURI for unique and evolving NFTs, combine ERC-721 with ERC-2981 for automated royalties on secondary sales, upload to IPFS via Pinata for full decentralization, test real cases like generative artworks in an enterprise setting, develop hooks for post-mint metadata updates, produce a complete deliverable with documentation for marketplaces, and gain autonomy for certifying Web3 projects.

Module 4ERC-721 Integrations: Marketplaces and Off-Chain (OpenSea, Moralis, The Graph)

Connect your ERC-721 contracts to OpenSea and Rarible via metadata standards and lazy minting, integrate indexers like The Graph for performant subgraph queries, use Moralis for secure real-time off-chain APIs, simulate sales and transfers on a mock marketplace in-person, apply to an enterprise case like a play-to-earn game, optimize gas fees for scalability, and finalize an integrated prototype ready for production to enhance your professional skills.

Module 5ERC-721 Security and Deployment: Audits, Upgrades, and Production (Slither, Echidna, Mainnet)

Audit your ERC-721 smart contracts with Slither and Echidna to detect reentrancy and overflows, implement proxy patterns for upgrades without downtime, deploy on Sepolia then Ethereum mainnet with multisig wallets, analyze real hacks like those on OpenSea to strengthen your code, produce a complete audit report and monitoring plan, and conclude with a red thread project defense to certify your advanced professional blockchain development skills.

Evaluation method

Technical MCQ on ERC-721 and its extensions at the end of the training
Continuous evaluation through practical exercises and code reviews
Defense of the red thread NFT project deployed and audited

Learning method

Courses led by an active Web3 Solidity expert
Practical exercises on real enterprise NFT cases
Progressive 5-day red thread ERC-721 project
Complete course materials and advanced Solidity resources

Methods, materials and delivery

The Training ERC-721 - Developing Secure NFT 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.

Equipment required

For the smooth delivery of the Training ERC-721 - Developing Secure NFT Smart Contracts 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 ERC-721 - Developing Secure NFT Smart Contracts 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.

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.

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.

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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

FAQ

Frequently asked questions

Which tools are used in ERC-721 training?+

Hands-on work runs on solidity, hardhat, foundry, deployment Scripts, IPFS and pinata. Those tools come from the ERC-721 program itself, delivered on site over 5 days, so participants practise on the stack they will use at work.

What can participants do after ERC-721 training?+

They can master advanced ERC-721 implementation to create professional certifying NFTs, develop optimized ERC-721 smart contracts with OpenZeppelin for enterprise use and design metadata management and royalties for scalable Web3 projects. Those are the stated objectives of the ERC-721 program at Advanced level, checked by the end-of-session assessment.

What does the ERC-721 program cover, day by day?+

Day 1: ERC-721 Fundamentals: Implement the standard interface with OpenZeppelin (Solidity, Hardhat). Day 2: Advanced ERC-721 Token Management: Minting, Burning, and Secure Transfers (Foundry, Deployment Scripts). Day 3: Metadata and Royalties in ERC-721: Integrate ERC-2981 and Dynamic URIs (IPFS, Pinata). Day 4: ERC-721 Integrations: Marketplaces and Off-Chain (OpenSea, Moralis, The Graph). Day 5: ERC-721 Security and Deployment: Audits, Upgrades, and Production (Slither, Echidna, Mainnet). The ERC-721 program runs over 5 days, delivered on site.

How is ERC-721 training assessed?+

Assessment relies on technical MCQ on ERC-721 and its extensions at the end of the training, continuous evaluation through practical exercises and code reviews and defense of the red thread NFT project deployed and audited. Learni issues a completion certificate together with the individual assessment report at the end of the ERC-721 program, which an L&D team can file as evidence.

How much does ERC-721 training cost per participant?+

ERC-721 training is priced on quote. The amount depends on headcount, format and how far the syllabus is tailored to your team. A detailed quote is sent within one business day, and team pricing covers the whole group from the second participant.ERC-721 training costs $5,775 per participant. For an in-company team, the flat rate starts at $10,395 for the whole group, up to 8 people. The detailed quote, sent within one business day, adjusts the amount to the format and how far the syllabus is tailored to your team.

How long does ERC-721 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 ERC-721 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 ERC-721 training?+

Mastery of Solidity, Ethereum smart contracts, and tools like Hardhat or Foundry.

Is a certificate issued after ERC-721 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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