Smart Contracts Jobs

Smart Contracts are a way of securely exchanging digital assets such as money, services, and goods. With this type of smart contract, both parties can have flexibility when it comes to managing their business and legal agreements. Smart Contracts allow two parties to set specific rules and obligations that are enforced through code on the blockchain. A Smart Contracts Expert can be hired to manage the development process from conception to implementation of a client's own Smart Contract.

Here's some projects that our expert Smart Contract Experts have made real:

  • Creation of unique DeFi capabilities including a transfer tax with certain maximum fee functions across different tokens.
  • Done for clients, the human-readable storage of vital information onto an immutable blockchain for safekeeping.
  • Designing peer-to-peer energy trading networks suited for use on Solidity blockchains.
  • Projects utilizing Bluetooth devices which make up a custodial wallet and its respective smart contract.
  • An innovative NFT Marketplace that allows users to engage in lazy minting capability.
  • Digital game creations with Algorand smart contracts guaranteed to deliver fair winnings upon completion.

In conclusion, any foray into blockchain technology with the aim of exchange or preservation of assets requires extensive experience in coding and developing secure trustless systems to ensure successful deployments of chains and contracts through its life cycle. With our talented community of Smart Contract Experts at Freelancer, any client can quickly hire experts to develop their custom project from scratch as long as their ideas are tangible and client can explain clearly what they require. We invite you to post your own project on Freelancer and let our experts help you achieve success!

From 23,401 reviews, clients rate our Smart Contracts Experts 4.83 out of 5 stars.
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    23 jobs found, pricing in USD

    More details: What type of blockchain development are you looking for? Blockchain integration Which blockchain platform do you prefer for your cryptocurrency development? This question was skipped by the user Are there any specific features or functionalities you would like to integrate into your existing system through blockchain integration? Secure and transparent transactions, Decentralized identity management, Immutable data storage

    $898 (Avg Bid)
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    Currently, I'm looking for a highly proficient and experienced developer to create a simple smart contract for a game on the Ethereum blockchain. The primary functionality that this contract should include is a robust player's betting system. The following criteria should be met: - Advanced knowledge and understanding of Ethereum and its related programming languages (Solidity, Vyper). - Proven experience in designing and developing smart contracts, ideally relating to gaming or betting systems. - Ability to integrate the smart contract with the game to ensure accuracy and fairness. - Implement a consequence system where players experiencing a failed bet will suffer loss of game assets. Your bid should highlight your experience in the above areas, and examples of past projects...

    $39 / hr (Avg Bid)
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    Blockchain Developer Wanted 6 days left
    VERIFIED

    We will launch a token voting platform and need a skilled blockchain developer for our project.

    $20 / hr (Avg Bid)
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    I'm in search of a TON chain expert with prior experience in presale to help fix existing errors in my project. Key Requirements: - TON Chain Expertise: Profound knowledge of TON chain and hands-on experience in working with it is a must. - Presale Experience: Prior experience in developing and managing presale projects is highly preferred. - Error Fixing: Capable of identifying and rectifying errors in an existing TON chain implementation. - Presale Launch Pad: Ability to implement and manage a presale launch pad within the TON chain. Your primary responsibilities will include: - Identifying and fixing errors in the current TON chain implementation. - Implementing a presale launch pad within the TON chain. - Assisting in the development of a successful presale strategy. Ideal cand...

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    I have an urgent need for a skilled blockchain developer who can swiftly handle smart contract development and blockchain integration. The project requires someone who can hit the ground running and deliver quality work within a tight timeframe. Ideal candidates should have: - Proven experience in smart contract development, particularly on Ethereum - A solid understanding of blockchain integration - The ability to work efficiently and under pressure - Good communication skills and a proactive approach to problem-solving The project timeline is urgent, so if you're confident in your blockchain skills and are available to start immediately, I'd love to hear from you.

    $530 (Avg Bid)
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    I am looking for a proficient developer who can build a decentralized application (DApp) aimed at the education sector. Key features include: - User registration and login system: To ensure smooth and secure access for users, I want a registration and login system based purely on the traditional email and password approach. - Interactive learning modules: These should incorporate diverse content types such as video lectures, interactive quizzes, and downloadable resources. - Token Wallet Integration: The DApp should allow users to hold and manage tokens. Proficiency in smart contract development and encryption is a must. - Initial Coin Offering (ICO) & DEX Trading: The project extends to setting up an ICO for the tokens and enabling their trade on decentralized exchanges. Candidat...

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    Hello, freelancers. If you are open to work, please reply me as soon as possible. We are going to migrate web2 to web3. There are 2 positions in this job. - Migration work from nodejs backend to smart contract - Integration nextjs frontend with blockchain After this project complete, we will give you some bounty and loyalty If you are online, join to this job. *** If you are new to freelancing, dont join to this job ***

    $36 / hr (Avg Bid)
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    Hello, Hope you are doing well. We're actively looking for a senior engineer with expert level Solidity smart contract skills with a web3 focus. You must have deep expertise in securing smart contracts using a combination of processes (ex: code reviews, audits), tools, and techniques. Bonus if you have a Security background. If your someone that's developed and shipped DeFi smart contracts holding significant value, we want to hear from you! This is a fully remote role and you'll be working in a fully distributed team with members across the globe. Responsibilities You'll implement new ideas, designing and testing complex DeFi smart contracts You'll take authority in your team checking your colleagues code for correctness and security Work with external security ...

    $31 / hr (Avg Bid)
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    I need a smart contract developed for the Tron blockchain to create an utility token. Key features and requirements: - The primary function of the token will be to provide utility within my platform. - Users will acquire the token through a giveaway, rather than purchase or earning. Ideal Skills and Experience: - Proficiency with Tron blockchain and smart contract development. - Experience in creating utility tokens. - Familiarity with token distribution mechanisms, particularly airdrops. - Understanding of blockchain governance structures is a plus.

    $688 (Avg Bid)
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    Please apply only if you can start immediately. I'm seeking a highly skilled blockchain developer to create first-rate smart contracts for an upcoming project. Though the specifics of the transactions that these smart contracts will be used for hasn't been decided yet, you'll be required to produce high-quality, robust, and efficient code. Key responsibilities will include: • Identifying and defining the requirements for the smart contracts • Creating and implementing the smart contracts Ideal candidates will have: • Proven experience in blockchain development • Extensive knowledge of smart contracts development • Ability to work independently and take initiative • Excellent problem-solving skills Please detail your experience with creating ...

    $14 / hr (Avg Bid)
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    We have developed our custom contract based on ERC721A that handles bulk minting in a single transaction. Now, I would need your help in doing the following tasks A- Uploading to IPFS: We have around 6k images. Out of which we would like to deploy 1K now and upload the rest of images for the collection later during our next sale phase. For IPFS pinning services, we would like to go with the Third Web - Here, I know that we can update uri for uploading the remaining images later for the remaining Please let me know if it would affect anyhow to the buyers who purchased NFTs before uploading these images. B - Regarding deployment on Testnet - Yes, before deploying the contract on Mainnet, we would like to check things on Testnet. Now, please let me know if there is any safe method of ...

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    Blockchain expert Needed 4 days left
    VERIFIED

    Understanding the Role of a Blockchain Developer To integrate wallet connect feature and make the game more decentralized by using smart contracts, it's essential to understand the role of a blockchain developer and the skills required for this task. A blockchain developer is responsible for developing decentralized applications (dApps) and smart contracts based on blockchain technology. They need to understand the architecture and protocols of the technology. In the context of game development, blockchain developers are also involved in developing 3D models, 3D designs, and 3D content used in games . Specializations within Blockchain Tech When looking for a blockchain developer to work on integrating the wallet connect feature and smart contracts into the game, it's importan...

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    I am looking for blockchain developers who specialize in Solana, with a focus on smart contract development. The goal of this project is to create a Solana-based utility token that can be redeemed on my website. This token will primarily grant limited time access to the control panel of our autonomous rover, used in our agri-tech business. Key Responsibilities and Skills: - Developing a Solana-based utility token - Ensuring this token can be redeemed on our website via QR code scanning - Enabling the redeemed token to provide limited time control access to our autonomous rover Ideal Experience: - Extensive experience in blockchain development - Strong expertise in Solana and smart contract development - Previous experience in utility token development and redemption - Familiarity with...

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    I'm in need of a Solidity expert to assist with developing smart contracts for Uniswap V3. Key Responsibilities: - Development of smart contracts for Uniswap V3 - Ensuring the security and efficiency of the code - Collaborate with the team to implement and deploy the smart contracts Required Expertise: - Proficiency in Solidity - Experience in developing smart contracts, preferably for Uniswap - Strong understanding of blockchain technology and smart contract security - Ability to work in a team environment Ideal Freelancer: I am ideally looking for a freelancer with an expert level of experience in Solidity. The ideal candidate would have a proven track record of developing secure and efficient smart contracts, particularly for Uniswap. A good understanding of DeFi protocols and b...

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    I am on the lookout for an experienced developer who is well-versed in Rust and Substrate. Their main task will involve the following: - Parachain development - Creation of smart contracts - Blockchain application development - Performance optimization The expected deliverables will be optimized smart contracts and blockchain applications on Polkadot. Even though specific outcomes for the smart contracts weren't provided, the ultimate goal is to leverage blockchain's full potential. The ideal candidate should have deep knowledge of the Polkadot platform and experience in working with Rust and Substrate. A solid understanding of blockchain solutions would be an added bonus. I look forward to working with someone who can efficiently apply their skills to meet our objectives.

    $743 (Avg Bid)
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    I'm looking for a skilled blockchain developer to help me create an RWA (Real-World Asset) token on the Ethereum blockchain. **Scope of the project:** - I need assistance in creating a token that can represent a real-world asset on the Ethereum blockchain. The primary goal of this token will be to tokenize a physical asset and make it liquid. - The token standard we're targeting is ERC-20. You should have a good understanding of this standard and experience in implementing it on the Ethereum blockchain. **Key Requirements:** - Proficiency in Ethereum blockchain development - Prior experience in creating ERC-20 tokens - Understanding of real-world asset tokenization - Good communication skills and the ability to explain complex technical concepts in simple terms I'm lookin...

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    I urgently need a specialist well-versed in the Tron blockchain platform. The task involves deploying a pre-existing smart contract. To succeed in this role, you must possess: Extensive proficiency and experience with the Tron blockchain. Prior knowledge and hands-on experience with smart contract deployments. The capability to complete the task promptly. Your primary responsibility will be to deploy the existing contract on the Tron chain seamlessly. No development or modification is necessary - I require an expert who can swiftly and flawlessly handle the deployment. If you have a talent for troubleshooting blockchain challenges and are comfortable with tight schedules, this opportunity is for you.

    $10 - $30
    Sealed NDA
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    I need a talented whitehat hacker proficient in Web3 to safeguard my future Airdrops from being unfairly claimed by sweep bot accounts. Key Tasks: - Saving future Airdrops Your task is to save Airdrops which blackhat hacker will claim within seconds...you have to outrun him....i will pay you huge

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    I'm looking for a skilled developer to design and build a website that will facilitate crypto funding rounds using the Solana network. This project involves creating a website that can transact with investors and distribute tokens at the end of all the funding rounds. Key elements of this project include: - Developing a site with the following features: Crypto funding rounds, Transaction capability, Token distribution - Using a Solana-based solution - Integrating the site with Crypto wallets - Writing secure Solana Smart Contracts Preferred Platform: ReactJS but open to suggestions Design: A design has already been prepared for the site as in Images and wording but the pages etc need to be setup. Ideal candidates for this project should have: - Proficiency in ReactJS - Experience...

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    I'm looking for an experienced developer to create a Solana-based staking app. The app needs to be available on both web and mobile platforms, following a specific design I have in mind. The app should provide advanced-level user interaction, catering specifically to experienced users in the staking ecosystem. Key Requirements: - Proficiency in Solana Blockchain Development - Experience in creating both Web and Mobile Applications - Ability to follow a specific design and layout - Understanding of staking in the blockchain space - Prior experience in developing advanced user interfaces and interactivity Please provide examples of your previous work in Solana development or similar blockchain projects when bidding. We only need US developers. Please do not bid on this job if you...

    $55 / hr (Avg Bid)
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    I'm in need of a developer to create a custom healthcare information system for managing patient records, scheduling appointments, and storing research laboratory results and patient consents. Key Features: - Patient Record Management: I need a system that can comprehensively manage patient records. This includes storing essential personal and medical information, as well as the ability to update and track changes over time. - Appointment Scheduling: The system should allow for efficient appointment scheduling. This includes features such as setting up and confirming appointments, as well as sending reminders. - Prescription Management: I also need the system to manage prescriptions for patients, including tracking medication, dosage, and instructions. System Preferences: - ...

    $2003 (Avg Bid)
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    I need a skilled Solidity developer to work on my existing smart contract. It has some functionality issues that need to be resolved, and it's also facing deployment errors. Your expertise in both troubleshooting and deployment is crucial for this project. Key Tasks: - Identify and fix the smart contract's functionality issues - Resolve any deployment errors that are preventing successful deployment While I didn't specify a particular optimization goal, I'm open to suggestions on how the contract could be optimized. This could include reducing gas fees, improving transaction speed, and enhancing security measures. Feel free to provide your own insights and recommendations in this area. Ideal Skills and Experience: - Proficient in Solidity programming language - Exten...

    $572 (Avg Bid)
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    Busco un desarrollador blockchain con experiencia para crear un Utility Token ERC-20 en Polygon con su correspondiente Smart Contract.

    $659 (Avg Bid)
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