Hire Solidity Developers

Hire the Top 3% of Freelance Solidity Developers

Toptal is a marketplace for top Solidity developers, engineers, programmers, coders, architects, and consultants. Top companies and startups choose Toptal Solidity freelancers for their mission-critical software projects.

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Clients rate Toptal Solidity developers 4.9 / 5.0 on average based on 1,471 reviews.

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Hire Freelance Solidity Developers

John McLaughlin

Freelance Solidity Developer
Verified Expert in Engineering
United States
Toptal Member Since September 12, 2022

John is a full-stack blockchain developer with 10+ years of experience, deploying 150+ Solidity smart contracts (ERC-20/721/1155) across Ethereum Mainnet and L2s, including Polygon, Arbitrum, and zkSync. He brings deep Solana and Rust expertise covering tokens, staking, and DEX integrations, and builds production multi-exchange trading platforms with real-time pipelines. As an AWS Certified Developer Associate, John delivers end-to-end solutions from smart contracts to polished UIs.

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Denis Baturin

Freelance Solidity Developer
Verified Expert in Engineering
Georgia
Toptal Member Since May 19, 2021

Denis is a blockchain analyst and a Solidity and Android developer. He has been in charge of everything blockchain-related in a hardware wallet company for over two years. He has integrated 10+ blockchains for a hardware wallet Android app in Kotlin and Java and developed a self-sovereign identity (SSI) POC app. Denis is experienced with smart contracts and NFTs and has a solid background as a system administrator and tech support.

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Kaustav Chakraborty

Freelance Solidity 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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Daniel Trinh

Freelance Solidity Developer
Verified Expert in Engineering
United States
Toptal Member Since March 24, 2022

Daniel is a lead Solidity developer with five years of experience in development and four years in Blockchain. He specializes in EVM protocols, decentralized finance, and NFTs. He's built several products in this space, including a Crowdfunding Protocol, a 200MM Stablecoin Protocol, an automated on-chain trading engine, and several NFT apps on Ethereum. Daniel is constantly learning about new projects, best practices, and design patterns in the EVM and blockchain protocol space.

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Nicolas Debaene

Freelance Solidity Developer
Verified Expert in Engineering
France
Toptal Member Since April 1, 2020

With a master of science degree in engineering and a specialization in data science from Telecom ParisTech, Nicolas has been solving concrete business cases for five years using machine learning and data mining. His experience in the eCommerce, banking, and consulting sectors gives him a very strong technology portfolio and a deep understanding of different business types.

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Abhi Panchal

Freelance Solidity Developer
Verified Expert in Engineering
India
Toptal Member Since July 10, 2022

Abhi is an ML and Generative AI engineer with 5+ years of experience delivering production-grade AI solutions. He specializes in LLMs, RAG, diffusion models, transformer architectures, chain-of-thought prompting, fine-tuning, and prompt engineering. Abhi is skilled in deep learning, computer vision, NLP, embeddings, vector databases, and multi-modal systems. He designs scalable ML pipelines with GPU acceleration, low-latency inference, MLOps (CI/CD, monitoring), and containerized deployments.

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Dee Acharjya

Freelance Solidity 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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Robert Pardela

Freelance Solidity Developer
Verified Expert in Engineering
Poland
Toptal Member Since October 7, 2022

Robert is an entrepreneur, IT manager, and developer specializing in blockchain. He has spearheaded dozens of large-scale projects, teams of over 40, and a budget of $30 million to deliver nationwide systems. Blockchain inspired him and changed the way he looked at IT systems. Robert is known for his innovation and strong ability to take a project from idea to successful implementation. He enjoys creating IoT solutions on Raspberry Pi and Arduino as a hobby.

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Mohammadi Gheis

Freelance Solidity Developer
Verified Expert in Engineering
Malaysia
Toptal Member Since January 7, 2022

Gheis is a blockchain expert and developer with experience in C++, C#, JavaScript, Go, Node.js, and MQL4/5. He excels in developing blockchain services, cross-platform software, artificial intelligence, trading bots, auto trade algorithms, and DApps while delivering top-notch user-friendly solutions. As a leader of the back-end, blockchain, and DevOps teams of 10+ developers, Gheis has been involved in many high-tech projects solving complex systems and identifying improvement opportunities.

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Sven Meyer

Freelance Solidity Developer
Verified Expert in Engineering
Australia
Toptal Member Since November 30, 2020

Sven has 20+ years of experience working on the most advanced and innovative technologies: IoT, data science, machine learning AI, and distributed systems. Since 2017 he has mainly focused on blockchain technology, working as a CTO and advisor, leading the technology and product definition. Sven developed smart contracts for blockchain-based decentralized finance platforms, token launch platforms, and real-world assets (RWA) tokenization with fractional ownership, securing over $100 million.

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Giorgi Lagidze

Freelance Solidity Developer
Verified Expert in Engineering
Georgia
Toptal Member Since April 9, 2019

Giorgi has over eight years of experience developing applications with Vue and React on the front end, and Laravel and Node.js on the back end. Over the past five years, he has specialized in blockchain and DeFi development using Solidity, with a strong focus on cross-chain solutions in the past years. Giorgi is known for exceptional communication, top-quality delivery, and creating one of the best Solidity frameworks for launching DAOs.

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... 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
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How to Hire Solidity Programmers 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 Solidity engineer for your project. Average time to match is under 24 hours.
3

The Right Fit, Guaranteed

Work with your new Solidity developer 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 Solidity 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.

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Capabilities of Solidity Developers

Toptal’s Solidity developers specialize in writing secure smart contracts for blockchain-based systems. Their expertise spans EVM architecture and tools like Hardhat and OpenZeppelin, enabling them to deliver efficient code for DeFi, NFTs, and decentralized governance.

Smart Contract Development in Solidity

Solidity enables decentralized systems to enforce on-chain logic. Toptal developers write secure, well-structured smart contracts for use cases like payments, access control, DAOs, and automated governance.

Mainnet and Testnet Deployment

Deploying contracts requires precision and rigorous testing. Our Solidity developers use frameworks like Hardhat and Remix to compile, test, and deploy contracts to Ethereum mainnet or testnets like Goerli.

Token Standard Implementation

Token standards form the foundation of modern digital assets. Toptal Solidity developers build and customize ERC contracts—such as ERC-20 for utility tokens or ERC-721 for NFTs—for seamless integration with marketplaces and DeFi protocols.

Security Audits and Risk Mitigation

Solidity contracts must be secure against known exploits. Our developers conduct comprehensive audits and eliminate major risks like reentrancy and flawed access control before deployment.

Contract-to-Front-end Integration

Smart contracts require smooth connectivity with the user interface to enable real-world interactions. Toptal Solidity developers use Ethers.js or Web3.js to connect smart contracts to decentralized front ends for seamless interaction.

Gas Optimization Strategies

Gas usage plays a critical role in how scalable and affordable smart contracts can be. Our solidity developers optimize on-chain performance by reducing storage needs and restructuring logic to limit unnecessary computation.

DeFi Protocol Architecture

Decentralized finance platforms depend on smart contract systems that interact seamlessly. Toptal developers design and deploy DeFi protocols that enable token exchanges, support staking mechanisms, and manage custom liquidity structures.

Automated Testing With Solidity Frameworks

Thorough testing is critical before deploying any smart contract. Our Solidity developers write automated unit and integration tests using tools like Hardhat and Mocha to confirm expected behaviors and reduce the risk of post-deployment errors.

Upgradeable Smart Contract Design

Not all blockchain logic is static—upgradeable contracts allow for iteration. Our developers apply proxy-based design patterns to support maintainable deployments that can evolve over time without losing stored data or core functionality.

Interface Documentation and ABI Sharing

Smart contracts are more useful when they’re easy to connect and reuse. Toptal developers generate ABI definitions and add clear NatSpec comments, making it easier for other developers or applications to integrate with deployed contracts.

FAQs

  • Typically, you can hire Solidity developers with Toptal in about 48 hours. For larger teams of talent or full end-to-end project 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 Solidity developer, 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.

  • To hire the right Solidity 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 Solidity developers for your project.

  • At Toptal, we thoroughly screen our Solidity engineers 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 Solidity engineers with Toptal, you’ll always work with world-class, custom-matched Solidity developers ready to help you achieve your goals.

  • You can hire Solidity developers on an hourly, part-time, or full-time basis. Toptal can also manage the project end-to-end based on your specific requirements as part of our Consulting and Services offerings. Whether you hire a Solidity 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 Solidity developers can fully integrate into your existing team for a seamless working experience.

  • We make sure that each engagement between you and your Solidity 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 Solidity 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

    Trusted Talent Only

    Our talent are thoroughly vetted professionals who ramp up quickly, function as essential team members, and deliver results.

  • Precise Matching

    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

    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

    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

    Effortless Scaling

    Scale your team up or down as needed, with quick and efficient hiring in under 48 hours.

  • Flexible Engagements

    Flexible Engagements

    Choose the engagement type that suits your needs—hourly, part-time, or full-time— and enjoy the flexibility to adjust as needed.

Top Solidity Developers Are in High Demand.

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