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We run a small but rapidly expanding web-3 studio and I’m looking for one experienced blockchain engineer I can rely on for a steady stream of work. The assignments range from writing and testing production-grade smart contracts to troubleshooting main-net deployments, building full dApps, and occasionally reviewing other developers’ code for security and gas optimisation. Because our clients come with very different ideas, you should be comfortable jumping between chains such as Ethereum, Binance Smart Chain, or even Polkadot when required, and you’ll likely touch Solidity most days, with Rust or Go popping up on some specialty jobs. If you have strengths in only one of those stacks, that’s fine—we can shape early tasks around your core expertise and then branch out together. Typical week-to-week work might involve: • Designing and unit-testing new smart contracts • Integrating on-chain logic with React or [login to view URL] front ends through [login to view URL] or [login to view URL] • Preparing migration scripts, verifying contracts on block explorers, and setting up CI for automated tests • Investigating failed transactions or odd state changes and producing a concise post-mortem for the client All code must be clean, easily auditable, and pushed to our private GitHub repo with clear commit messages. I handle project management and client communication, so you can focus on shipping solid code on time. If you like long-term collaboration, quick feedback loops, and technically interesting problems, let’s talk. Please include a link to a repo or main-net contract you’re proud of so I can see your style in action.
Project ID: 40538890
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76 freelancers are bidding on average $32 USD/hour for this job

As an experienced and versatile blockchain engineer, I am well-equipped to handle the varied tasks your projects demand. My deep understanding and practical experience with Ethereum, Solana, Polygon, and Bitcoin Core will be an asset as we traverse different chains for different clients. While Solidity is my daily language, I'm also proficient in Rust, which aligns with your choice of specialty jobs. I bring much more to the table than my capacity to write proficient code and test smart contracts. In addition, my skills include launching custom crypto coins (ERC, BNB & SOL based) and developing decentralized (DEX) and centralized (CEX) exchanges – a testament to my versatility in building secure blockchain solutions tailored to specific needs. Throughout my career, I've placed strong emphasis on clean code that's easily auditable – a requirement you rightly prioritize. Navigating complex networks demands precision without missing on speed; I've successfully blend those together in all of my works. Delegate the technical parts of projects to me so that you can focus on project management and client satisfaction.
$45 USD in 40 days
7.2
7.2

Hello, Your long term opportunity is exactly the type of engagement I am looking for. I have strong experience working with blockchain applications, smart contracts, dApps, contract testing, deployment management, and security reviews across EVM ecosystems. I am comfortable handling the full lifecycle from contract development and audits to frontend integration and production deployment. I also have experience investigating transaction issues, optimizing contract performance, and maintaining clean, reviewable code for growing projects. I would love to schedule a quick discussion to learn more about your current clients, preferred chains, and upcoming projects. I am confident I can become a dependable technical partner for your studio. I will share my portfolio in chat I look forward to hear from you. Thanks Best Regards, Mughira
$38 USD in 40 days
5.2
5.2

Hello, Let's turn great ideas into products people love using and businesses love growing with. Your need for an experienced blockchain engineer aligns perfectly with my expertise in developing production-grade smart contracts, troubleshooting main-net deployments, and building full dApps across various chains like Ethereum, Binance Smart Chain, and Polkadot. I excel in Solidity, Rust, and Go, ensuring versatility in handling different tasks. I understand the importance of clean, auditable code and seamless integration with front-end technologies like React or Next.js. My approach involves designing robust smart contracts, setting up CI for automated tests, and providing detailed post-mortems for failed transactions. With a focus on long-term collaboration and delivering quality code promptly, I am eager to discuss how we can work together to tackle your unique challenges. To kickstart our collaboration, could you share more details about the specific projects in your pipeline? How do you envision scaling your web-3 studio in the coming months? Let's connect and explore how we can elevate your blockchain development initiatives together. Looking forward to your response. Cheers, Yuan.C.
$50 USD in 40 days
2.8
2.8

YES------------BLOCKCHAIN EXPERT READY FOR LONG-TERM COLLABORATION. I will help with smart contracts, dApp development, Web3 integrations, deployment troubleshooting, security reviews, and gas optimization across multiple chains. Please ping me to discuss further and deliver reliable, production-ready results. Thanks.
$30 USD in 40 days
2.8
2.8

Hello, I have extensive experience in the mentioned technologies and am ready to start immediately. Let’s connect via chat to discuss the project requirements further. Thank you, Jignesh
$25 USD in 40 days
2.6
2.6

SolutionzHere can support this as a long-term blockchain engineer for smart contracts, dApps, deployment troubleshooting, and security/gas reviews. The role sounds like a good fit for someone strong in Solidity first, with flexibility to branch into Rust or Go when needed. A fair rate is $35–$50/hour depending on chain complexity, security review depth, and whether the work is mostly greenfield contracts or production debugging. For your proposal, I’d keep it simple: Smart contract development and testing. dApp integration with React or Next.js. Deployment, verification, and CI for blockchain projects. Post-mortems for failed transactions or state issues. One quick question: are you looking for someone primarily on Ethereum/Solidity, or do you need Polkadot/Rust work in the near term as well?
$50 USD in 40 days
2.0
2.0

Hello, I can help you design and develop a secure, scalable blockchain solution tailored to your requirements. I have experience building smart contracts, decentralized applications (dApps), and integrating blockchain with existing systems using technologies like Ethereum, Solidity, Web3, and Node.js. I focus on writing secure, optimized smart contracts, ensuring proper testing, and delivering user-friendly interfaces for seamless interaction. Whether it's DeFi, NFT platforms, wallets, or custom blockchain solutions, I can handle the complete development lifecycle. I’m available to start immediately and can deliver high-quality work within your timeline. Let’s connect to discuss your project in detail. Best regards, Anju
$30 USD in 40 days
0.0
0.0

BEFORE YOU MAKE A DECISION, GIVE ME A MOMENT TO SHOW YOU WHAT SETS ME APART. I recently completed a project involving writing and testing production-grade smart contracts, troubleshooting main-net deployments, building full dApps, and reviewing code for security and gas optimization. SUCCESS ISN’T JUST ABOUT EXECUTION—IT’S ABOUT MAKING THE RIGHT DECISIONS BEFORE THE WORK STARTS. Regards, Nabeel Ismail
$25 USD in 7 days
0.0
0.0

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