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Best freelance Solidity Engineers for Blockchain to hire in 2025

Looking to hire Solidity Engineers for your next Blockchain project? Browse the world’s best freelance Solidity Engineers for Blockchain on Contra.

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Profile avatar
Sheng Yu
PROBeijing, China
$10k+
Earned
14x
Hired
5.0
Rating
7
Followers
FRAMER_EXPERT

Expert

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Solidity Engineer(1)
Profile avatar
Justin Davidson
PROChicago, USA
5.0
Rating
1
Followers
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Solidity Engineer(2)
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Top services from Solidity Engineers on Contra

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Ethereum

Ethereum

Smart Contract Engineer

Blockchain Developer

Ethereum Smart Contract + API + Crossplatform App

Contact for pricing

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Backbone.js

Backbone.js

Smart Contract Engineer

Blockchain Developer

Blockchain and dapp Developer

$75/hr

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Ethereum

Ethereum

Solidity Engineer

Blockchain Developer

Smart Contract Audit

Contact for pricing

Top locations for Solidity Engineers for Blockchain

San Francisco, United StatesChicago, United StatesParis, France

FAQs

Check if they have worked on Ethereum projects or with other blockchains. See if they have experience writing smart contracts and know Solidity well. Consider their expertise in deploying and testing smart contracts too.
Share your project's details and objectives clearly. Ask them to summarize what they understood. This can help you see if they grasp your project’s needs.
They should know how to use tools like Truffle, Remix, or Hardhat for writing and testing code. Understanding of blockchain explorers like Etherscan is useful too. Check if they are aware of version control systems, like Git, to manage code.
Discuss the project timeline and any specific milestones. Agree on deliverables and communication frequency. Make sure they know your goals before starting.
Request examples of their previous work or demo projects. You can also conduct a practical test focused on your project’s complexity. This helps in understanding if their skills are suitable.
Ask about challenges they've faced on past projects and how they solved them. Inquire about how they handle contract vulnerabilities. This reveals their problem-solving approach.
Discuss how they ensure code is secure and free from bugs. Ask about their experience with security tools like MythX or Slither. Checking their knowledge of common security vulnerabilities is important.
Documentation helps everyone understand the smart contract’s function. It’s vital for future updates or troubleshooting. Ensure that they describe code logic and functionalities clearly.
Set milestones based on key project stages or deliverables. Each milestone should reflect a significant part of the work completed. This approach can help track progress and ensure alignment with your expectations.
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