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Rapidly build blockchain apps. Web3.js devs quickly integrate Ethereum-based solutions—hire now, onboard this week.

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worked since 2015

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Gotta drop in here for some Kudos. I’m 2 weeks into working with a super legit dev on a critical project and he’s meeting every expectation so far 👏

Francis Harrington

Founder at ProCloud Consulting, US

I recommend Lemon to anyone looking for top-quality engineering talent. We previously worked with TopTal and many others, but Lemon gives us consistently incredible candidates.

Allie Fleder

Co-Founder & COO at SimplyWise, US

I've worked with some incredible devs in my career, but the experience I am having with my dev through Lemon.io is so 🔥. I feel invincible as a founder. So thankful to you and the team!

Michele Serro

Founder of Doorsteps.co.uk, UK

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How to hire Web3.js developer through Lemon.io

Place a free request

Fill out a short form and check out our ready-to-interview developers

Tell us about your needs

On a quick 30-min call, share your expectations and get a budget estimate

Interview the best

Get 2-3 expertly matched candidates within 24-48 hours and meet the worthiest

Onboard the chosen one

Your developer starts with a project—we deal with a contract, monthly payouts, and what not

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What we do for you

Sourcing and vetting

All our developers are fully vetted and tested for both soft and hard skills. No surprises!

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We match fast, but with a human touch—your candidates are hand-picked specifically for your request. No AI bullsh*t!

Arranging cooperation

You worry not about agreements with developers, their reporting, and payments. We handle it all for you!

Support and troubleshooting

Things happen, but you have a customer success manager and a 100% free replacement guarantee to get it covered.

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FAQ about hiring Web3.js developers

Where can I find Web3.js developers?

You can find Web3.js developers on job boards, freelance platforms, and online developer communities. You may also go to blockchain-related specialist forums, reach out to recruitment agencies focused on tech talent, or network at blockchain conferences and meetups to meet proficient Web3.js developers. On the other side, an independent candidate search is very time-consuming. However, seeking a developer on one’s own requires too much time: reviewing candidate qualifications, skills assessment, and conducting interviews are all too long procedures. If you are searching for a quick solution, then try Lemon.io. We’ll introduce you to pre-vetted Web3.js developers whose soft and hard skills perfectly fit your needs and set up a few calls for you to meet in person.

What is the no-risk trial period for hiring Web3.js developers on Lemon.io?

Onboard Web3.js developers at Lemon.io and get up to 20 hours of no-risk paid trial work. That’s just perfect for checking that the developer’s skills perfectly match your technical requirements and that everything is going smoothly. If satisfied, you can further work with the developer by signing up for a subscription. In case of unsatisfactory results, which is an unlikely case, we will help you find a new Web3.js developer that best fits the needs of your project.

Is there a high demand for Web3.js developers?

Yes, there is a high demand for Web3.js developers. The demand for Web3.js developers is high due to blockchain technology’s and decentralized applications’ phenomenal popularity. Web3.js is a fundamental library for any interaction with the Ethereum blockchain that powers many dApps, DeFi projects, and NFTs. More and more businesses and startups are exploring blockchain solutions to bring greater security, transparency, and decentralization to many industries, from finance to supply chain management. This growing interest in blockchain technology increases the demand for skilled Web3.js developers who can create and manage smart contracts, integrate blockchain functionality into applications, and assure precise operation within a decentralized ecosystem.

How quickly can I hire a Web3.js developer through Lemon.io?

Lemon.io will connect you with the best Web3.js developer in a week. Our matching process is lightning-fast. You’ll get the top, hand-picked candidates in a day or two. We will then set up several calls with the candidates that interest you the most. Our developers have been pre-screened by our expert recruiters and technical professionals. Our rigorous vetting process includes reviewing resumes, checking soft skills, technical evaluation, and only coding tests when necessary. This ensures that we showcase only the best and most reliable developers.

What are the main strengths of Lemon.io’s platform?

One of the main strengths of Lemon.io is smooth and fast matching procedures. We manually search for a developer according to the tech stack, skills, and expectations of your project to find the right fit. We connect you with 1-2 perfectly matched candidates from our pool of top 1% vetted talent. These developers have undergone a few thorough checks: a resume review, a screening call, and a technical interview. The developers have 4+ years of experience and pass scrupulous vetting, which includes profile completion, a screening call, and a technical interview. Besides, we have an option for subscription or direct hire and give a no-risk trial period of up to 20 hours. You may further collaborate with the developer by signing up for a subscription if you are satisfied with his work. Otherwise, in the extremely rare circumstances of an unforeseen scenario, we will pair you with another developer.

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Susanna Lishchenko

Recruiting Team Lead at Lemon.io

Hiring Guide: Web3.js Developers

Hiring Web3.js developers is critical for companies building decentralized applications (dApps), blockchain platforms, and Web3 ecosystems. Web3.js is a powerful JavaScript library that enables interaction with the Ethereum blockchain and other EVM-compatible networks. Skilled Web3.js developers bridge the gap between blockchain and front-end technologies, ensuring your decentralized app provides seamless connectivity, smart contract integration, and real-time blockchain interaction.

Why Hire Web3.js Developers

Web3.js developers specialize in developing, testing, and integrating blockchain functionality with web or mobile front-ends. By hiring experienced Web3.js professionals, you can:

Build decentralized applications that interact directly with Ethereum and similar blockchains.
Integrate smart contracts written in Solidity with your user-facing interfaces.
Develop secure cryptocurrency wallets, NFT marketplaces, and DeFi platforms.
Enable seamless wallet connections using MetaMask, WalletConnect, or Coinbase Wallet.
Implement secure transaction signing, gas fee management, and event listening for blockchain events.

Key Skills to Look For

Programming Languages: JavaScript (ES6+), TypeScript, Solidity, and Node.js.
Blockchain Expertise: Ethereum, Polygon, BNB Chain, Avalanche, and Arbitrum.
Frameworks: Web3.js, Ethers.js, Truffle, Hardhat, and Next.js.
Smart Contract Development: Solidity, Remix IDE, and OpenZeppelin libraries.
Front-End Skills: React.js, Vue.js, or Angular for dApp UIs.
Testing & Tools: Mocha, Chai, Ganache, Infura, and Alchemy.
Security Awareness: Knowledge of wallet security, private key management, and gas optimization.

Experience Levels

Junior Developers (0–2 years): Assist with smart contract integration, wallet setup, and basic Web3.js scripting.
Mid-Level Developers (2–5 years): Build complete dApp interfaces, implement blockchain event handling, and manage off-chain integrations.
Senior Developers (5+ years): Architect large-scale Web3 ecosystems, optimize smart contract performance, and lead blockchain development teams.

Cost to Hire Web3.js Developers

The cost of hiring Web3.js developers depends on project complexity, blockchain expertise, and experience level:

Junior: $50–80/hour — suitable for basic wallet and Web3 integration tasks.
Mid-Level: $90–140/hour — for end-to-end dApp development and smart contract integration.
Senior: $150–250/hour — for architecting decentralized ecosystems and leading blockchain development teams.

At Lemon.io, we connect you with vetted Web3.js developers who have deep expertise in blockchain, smart contracts, and decentralized web infrastructure.

Best Practices When Hiring Web3.js Developers

Look for candidates with strong knowledge of Ethereum and EVM-compatible networks.
Ensure experience in smart contract development, deployment, and testing.
Evaluate understanding of blockchain security, gas optimization, and wallet interactions.
Ask for portfolio projects demonstrating live Web3.js integrations.
Test communication and problem-solving skills for remote collaboration.

Common Mistakes to Avoid

Hiring front-end developers without blockchain experience.
Overlooking knowledge of private key and transaction security.
Ignoring experience with network APIs like Infura or Alchemy.
Failing to verify understanding of gas management and contract deployment pipelines.

Related Lemon.io Hiring Pages

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Hire world-class Web3.js developers from Lemon.io to build powerful decentralized applications, smart contract interfaces, and blockchain integrations. Our pre-vetted experts ensure scalability, reliability, and secure blockchain interaction tailored to your project’s needs.

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FAQs

What does a Web3.js developer do?: A Web3.js developer builds decentralized applications that interact with blockchain networks through Web3.js, handling wallet integration, smart contract communication, and transaction management.
Why use Web3.js in blockchain development?: Web3.js enables developers to interact directly with the Ethereum blockchain, read and write smart contract data, and manage blockchain transactions through JavaScript interfaces.
How much does it cost to hire a Web3.js developer?: Rates typically range from $50 to $250 per hour based on experience, blockchain proficiency, and project complexity.
What skills should a Web3.js developer have?: Strong JavaScript/TypeScript knowledge, Solidity experience, Ethereum smart contract integration, and understanding of wallet management and blockchain event handling.
Why hire through Lemon.io?: Lemon.io connects you with pre-vetted Web3.js developers experienced in decentralized app development, blockchain integration, and secure wallet solutions for modern Web3 projects.

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