Hire Web3 Developers
Hire the Top 3% of Freelance Web3 Developers
Hire vetted Web3 developers, consultants, architects, experts, programmers, and developers on demand. Leading companies choose Web3.js freelancers from Toptal for their most important development projects.
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Hire Freelance Web3 Developers
Imi Kim
Freelance Web3 Developer
Verified Expert in Engineering
Canada
Toptal Member Since August 21, 2022
Imi is a seasoned developer with over 30 years of experience leading and implementing systems to solve complex business problems. He has solid expertise in blockchains, mathematical and back-end coding, machine learning, trading, and systems design. Imi can help create a highly efficient version of whatever system a client is working on.
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Julian Cislo
Freelance Web3 Developer
Verified Expert in Engineering
Canada
Toptal Member Since October 6, 2022
Julian is a full-stack Web 3.0 developer and consultant. He specializes in solidity smart contracts design, development, and security considerations. He has founded QuantDeFi, a consulting company in the blockchain space that offers to solve all Web 3.0-related problems for clients looking to integrate blockchain solutions. Julian also features his skills in transaction automation, having constructed arbitrage and liquidation bots utilizing flash-loan technologies.
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Yashveer Rana
Freelance Web3 Developer
Verified Expert in Engineering
India
Toptal Member Since March 26, 2018
Yashveer boasts over a decade of experience crafting and optimizing software for dynamic startups and large established enterprises, with a sharp focus on scalability. As a co-founder and CTO of an AI-driven fintech company, he designed a product that supports 400,000 users monthly. Skilled in Java and Node.js, Yashveer relies on these tools for development, while music fuels his energy during intense coding sessions.
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Éric Lamontagne
Freelance Web3 Developer
Verified Expert in Engineering
Canada
Toptal Member Since August 2, 2022
Éric has 23 years of software development experience since obtaining his bachelor's degree in software engineering. He has created a software development consultancy, founded a startup, and published mobile apps in Apple's App Store. He is certified in blockchain and is a Microsoft Certified Solution Developer (MCSD). Éric has worked with organizations of all sizes, from successful startups to corporations in the transportation, media, energy, aeronautics, insurance, and financial sectors.
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Dee Acharjya
Freelance Web3 Developer
Verified Expert in Engineering
United States
Toptal Member Since March 19, 2024
Dee is a full-stack engineer with experience leading teams and providing hands-on coding for scalable solutions. He has contributed to projects in diverse industries, including document management, blockchain, legal, and telecommunications, becoming highly proficient in Node.js, NestJS, React, Next.js, GraphQL, .NET, and C#. Dee is also adept at managing SQL and NoSQL databases and deploying CI/CD pipelines using GitHub Actions, Docker, and Kubernetes.
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Luciano Greiner dos Santos
Freelance Web3 Developer
Verified Expert in Engineering
Brazil
Toptal Member Since June 9, 2016
Luciano is a seasoned professional with a decade and a half of experience developing Java enterprise applications. Currently, he's focused on big-data technologies such as Spark, Cassandra, Kafka, and Elasticsearch. He's capable of working as a full-stack engineer, having also worked with JavaScript and AngularJS in the past. Luciano is also fluent in English, has a native level in Portuguese, and has basic Spanish speaking abilities.
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Kaustav Chakraborty
Freelance Web3 Developer
Verified Expert in Engineering
India
Toptal Member Since October 9, 2021
Kaustav is a hands-on, goal-oriented, versatile technology professional with more than two decades of experience, primarily in open-source digital technologies, such as blockchain, IoT, microservices, cloud, distributed architecture, R&D, design, and development, with a proven track record delivering consistent business results. He loves to take on technical challenges, learn about new technology innovations, and deliver successful products worldwide.
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Kartik Bajaj
Freelance Web3 Developer
Verified Expert in Engineering
Canada
Toptal Member Since August 31, 2021
Kartik is a seasoned engineering leader with a strong technical foundation and experience across high-growth startups and established tech companies. In his most recent position as Co-founder and VP of Engineering at WonderFi, he was responsible for driving product engineering and development strategy and scaling engineering operations to support the company’s ambitions in the fintech and Web3 space.
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Jerome Sonnet
Freelance Web3 Developer
Verified Expert in Engineering
United Arab Emirates
Toptal Member Since August 5, 2022
With 20+ years in finance, risk management, and IT, Jerome specializes in Odoo ERP architecture and project execution. He excels at designing and implementing scalable solutions and optimizing business processes with Agile development and cloud integration. He has led end-to-end Odoo deployments, engaged regulators, recruited strategic partners, and driven stakeholder alignment. As a full-stack IT engineer, Jerome ensures robust, efficient ERP systems that enhance operational performance.
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Robert Keyan
Freelance Web3 Developer
Verified Expert in Engineering
Armenia
Toptal Member Since September 20, 2022
For over ten years, Robert honed his skills in developing web applications using the MER(A)N-stack. His journey spans collaborations with diverse teams and enterprises, bridging continents with remote collaborations in various industries across Germany, Russia, the US, and Israel. Robert's focus has evolved into a multifaceted leadership role in recent years. Beyond coding, he has embraced the challenge of guiding and managing teams of developers while architecting a technological solution.
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Dan Field
Freelance Web3 Developer
Verified Expert in Engineering
United Kingdom
Toptal Member Since October 18, 2022
Dan is a software engineer and architect with almost three decades of experience in startups spanning consumer tech, web, eCommerce, mobile, Internet of things (IoT), Internet service providers (ISPs), telco, and blockchain industries. He is an innovator and technical lead with the ability to work across multiple industries, technologies, and levels. With solid experience developing new technologies, Dan can quickly climatize to new projects.
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Start HiringToptal in the press
... allows corporations to quickly assemble teams that have the right skills for specific projects.
Despite accelerating demand for coders, Toptal prides itself on almost Ivy League-level vetting.
Our clients
Creating an app for the game
Leading a digital transformation
Building a cross-platform app to be used worldwide
Drilling into real-time data creates an industry game changer
Testimonials
How to Hire Web3 Consultants Through Toptal
1
Talk to One of Our Client Advisors
A Toptal client advisor will work with you to understand your goals, technical needs, and team dynamics.
2
Work With Hand-selected Talent
Within days, we'll introduce you to the right Web3 architect for your project. Average time to match is under 24 hours.
3
The Right Fit, Guaranteed
Work with your new Web3 expert for a trial period (pay only if satisfied), ensuring they're the right fit before starting the engagement.
EXCEPTIONAL TALENT
How We Source the Top 3% of Web3 Developers
Our name “Toptal” comes from Top Talent—meaning we constantly strive to find and work with the best from around the world. Our rigorous screening process identifies experts in their domains who have passion and drive.
Of the thousands of applications Toptal sees each month, typically fewer than 3% are accepted.
Capabilities of Web3.js Developers
Web3.js developers build decentralized applications that interact seamlessly with Ethereum networks. From smart contract integration and wallet authentication to token minting and cross-chain connectivity, they create secure, scalable blockchain interfaces that power the next generation of decentralized technology.
Smart Contract Development
Smart contracts define the core logic of decentralized applications and must be secure, efficient, and upgradeable. Toptal Web3 developers write, test, and deploy smart contracts using Solidity or Vyper, connecting them seamlessly to front ends and blockchain networks via the Web3.js library.
Decentralized Application Architecture
User-facing decentralized applications (dApps) require seamless communication between smart contracts, blockchain nodes, and front-end interfaces. Our Web3 architects build dApps using frameworks like Web3.js, Ethers.js, and Wagmi to enable reliable wallet integration, contract interaction, and blockchain connectivity.
Wallet Authentication Integration
Users expect direct, secure access to blockchain apps without creating new accounts or passwords. Toptal Web3 developers implement wallet-based authentication using tools like MetaMask and WalletConnect to streamline login, transaction approval, and session management.
Blockchain Transaction Management
Failed or delayed transactions can erode user trust and compromise application reliability. Our Web3 programmers manage blockchain interactions by sending, verifying, and optimizing transactions to ensure accuracy, minimize gas usage, and maintain consistent on-chain performance.
Tokenomics Design and Token Minting
Successful tokens must be designed with clear rules around utility, supply, and distribution. Toptal developers create and deploy ERC-20, ERC-721, and ERC-1155 tokens by writing smart contracts, managing initial supply, and integrating tokens into dApps for governance, payments, or digital assets.
On-chain and Off-chain Data Handling
Storing everything on-chain can slow applications and overwhelm users with gas fees. Our Web3 architects balance data distribution by keeping essential transactions on-chain and moving metadata or large files to systems like IPFS or traditional databases.
Security Practices and Audit Readiness
Smart contract vulnerabilities can lead to irreversible loss of funds or system failure. Toptal developers follow security best practices by writing clean, testable code, performing automated and manual audits, and preparing contracts for external review before deployment.
Node Infrastructure Management
Unreliable node connections can disrupt dApp functionality and block user transactions. Our Web3 developers manage node infrastructure by running full nodes or integrating with providers like Infura and Alchemy to maintain consistent access to blockchain networks with high availability and low latency.
Cross-chain Application Development
Web3 projects increasingly require access to assets and users across multiple blockchains. Toptal Web3 experts build cross-chain applications using bridges and interoperability protocols to enable token transfers, shared logic, and seamless interaction between Ethereum, Layer 2s, and other blockchain ecosystems.
Open Source and DAO Contributions
Web3 ecosystems grow through community-led development and transparent collaboration. Toptal Web3 developers contribute to DAOs and open source projects by improving protocols, building shared tools, and supporting decentralized infrastructure that drives innovation across the blockchain space.
FAQs
How quickly can you hire with Toptal?
Typically, you can hire Web3 developers with Toptal in about 48 hours. For larger teams of talent or Managed Delivery, timelines may vary. Our talent matchers are highly skilled in the same fields they’re matching in—they’re not recruiters or HR reps. They’ll work with you to understand your goals, technical needs, and team dynamics, and match you with ideal candidates from our vetted global talent network.
Once you select your Web3 expert, you’ll have a no-risk trial period to ensure they’re the perfect fit. Our matching process has a 98% trial-to-hire rate, so you can rest assured that you’re getting the best fit every time.
How do I hire Web3 developers?
To hire the right Web3 programmer, it’s important to evaluate a candidate’s experience, technical skills, and communication skills. You’ll also want to consider the fit with your particular industry, company, and project. Toptal’s rigorous screening process ensures that every member of our network has excellent experience and skills, and our team will match you with the perfect Web3 developers for your project.
How are Toptal Web3 consultants different?
At Toptal, we thoroughly screen our Web3 JS developers to ensure we only match you with the highest caliber of talent. Of the more than 200,000 people who apply to join the Toptal network each year, fewer than 3% make the cut.
In addition to screening for industry-leading expertise, we also assess candidates’ language and interpersonal skills to ensure that you have a smooth working relationship.
When you hire Web3 architects with Toptal, you’ll always work with world-class, custom-matched Web3 developers ready to help you achieve your goals.
Can you hire Web3 architects on an hourly basis or for project-based tasks?
You can hire Web3 experts on an hourly, part-time, or full-time basis. Toptal can also manage the entire project from end-to-end with our Managed Delivery offering. Whether you hire a Web3 developer for a full- or part-time position, you’ll have the control and flexibility to scale your team up or down as your needs evolve. Our Web3 developers can fully integrate into your existing team for a seamless working experience.
What is the no-risk trial period for Toptal Web3 experts?
We make sure that each engagement between you and your Web3 developer begins with a trial period of up to two weeks. This means that you have time to confirm the engagement will be successful. If you’re completely satisfied with the results, we’ll bill you for the time and continue the engagement for as long as you’d like. If you’re not completely satisfied, you won’t be billed. From there, we can either part ways, or we can provide you with another Web3 developer who may be a better fit and with whom we will begin a second, no-risk trial.
Tap Into World-class Talent
Trusted Talent Only
Our talent are thoroughly vetted professionals who ramp up quickly, function as essential team members, and deliver results.
Precise Matching
Our experienced talent matchers specialize in pairing you with the right fit. They work to understand exactly what you need and hand-select the best professionals for your project.
Seamless Hiring
We handle all aspects of billing, payments, and NDAs, streamlining the hiring process so you can focus on innovation, not overhead.
No-risk Trial Period
We want to be sure your engagement is a total success, so we offer a no-risk trial period. Work with your new hire for up to two weeks and pay only if you’re satisfied.
Effortless Scaling
Scale your team up or down as needed, with quick and efficient hiring in under 48 hours.
Flexible Engagements
Choose the engagement type that suits your needs—hourly, part-time, or full-time— and enjoy the flexibility to adjust as needed.
Featured Toptal Web3.js Publications
Top Web3 Developers Are in High Demand.