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 24,841 reviews, clients rate our Smart Contracts Experts 4.85 out of 5 stars.
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    24 jobs found, pricing in NZD

    I am looking for a skilled developer who can integrate a crypto wallet into my existing website and improve the front-end development. The ideal candidate should have experience with blockchain technology and be proficient in front-end development languages such as HTML, CSS, and JavaScript. Please provide a bid for this project, including the estimated time to complete the integration and front-end improvements. Also, include any relevant experience or examples of previous work related to crypto wallet integration and front-end development. Thank you! JD: Project Codebase:

    $7229 (Avg Bid)
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    34 bids

    create a telegram bot that analyzes new meme coins/shitcoins to identify whether the token itself is a scam or real, analyze the contract, the telegram group, and give a rating from 1-100 about the risk of investment, etc. AND the bot should also show Block 0 snips (Approval)for those who are ready to snipe! before the coin is launched

    $85 / hr (Avg Bid)
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    18 bids
    Solana Bot Developer 6 days left
    VERIFIED

    1. First code that reads token adresses from .txt or .csv file and reads if the token is found first time or it second if the first time then buys x amount of SOL or USDC (depends which one is better for you) then if the token adress was already found before then skip, search for other new token addreses in that .txt or .csv Then check current bought tokens price and if the price increased 100% sell out 50% of wallet total token holdings if the price increased 300% sell out 100% ot token, if the price from entry price went down to -90% take out 100% 2. Add function to that primary code before buying check if liquidity pool is locked and mintable then only enter if not skip and wait for new token adress Swap exchange does not matter I prefer Jupiter depends on the price and code complexity

    $362 (Avg Bid)
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    I'm seeking an experienced blockchain developer to create an Ethereum based ERC-20 token, with unique features of a private pre-sale and a vesting period. Key Responsibilities: - Develop an Ethereum ERC-20 token from scratch. - Implement a private pre-sale phase for initial investors. - Set up a vesting period for token distribution to prevent immediate selling off. Ideal expertise and skills: - Extensive experience in Ethereum blockchain and ERC-20 tokens. - Familiarity with smart contract security, specifically the implementation of a private pre-sale and vesting period. - Ability to create custom functionality beyond standard ERC-20 token framework. For this project, using typical smart contract security method like OpenZeppelin or Consensys Due Diligence is not preferred. ...

    $36 (Avg Bid)
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    Ethereum MEV Bot Developer 5 days left
    VERIFIED

    We are looking for a skilled blockchain developer with a strong background in creating Maximum Extractable Value (MEV) bots. The ideal candidate will have hands-on experience in developing efficient and fast MEV bots to capitalize on blockchain opportunities, including strategies such as frontrunning, arbitrage, sandwiching, and flash loans. Responsibilities: -Design and develop a high-performance MEV bot capable of executing complex trading strategies on blockchain networks. -Implement algorithms and logic for frontrunning, arbitrage, sandwiching, and flash loans to maximize profitability. -Integrate risk management mechanisms to evaluate and mitigate potential downsides of transactions. -Optimize bot performance for speed, reliability, and scalability to handle high transaction volumes...

    $14082 (Avg Bid)
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    I am seeking a developer to create a tool that can calculate the profit and loss (PnL) for any given Ethereum wallet address. The tool should be able to determine the total number of coins bought, as well as calculate the profit and loss from all transactions associated with the wallet. Key Features: Wallet Address Input: Users should be able to input any Ethereum wallet address. Transaction Analysis: The tool should analyze all transactions associated with the provided wallet address. Profit and Loss Calculation: Calculate the total number of coins bought and the profit and loss incurred from all transactions. User-Friendly Interface: The tool should have a user-friendly interface for ease of use. Skills Required: Proficiency in Ethereum blockchain technology. Experience in cryptocurre...

    $73 (Avg Bid)
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    I'm in need of a skilled developer who can create a custom module for the Cosmos SDK. This module will be focused on token creation. As I've never worked with the Cosmos SDK before, I require someone who is not only familiar with it but also has a strong grasp of blockchain development and tokenomics. Key Requirements: - Development of a custom module for the Cosmos SDK - Focus on token creation - Expertise in Cosmos SDK and blockchain development The successful candidate will need to be able to understand the project requirements, propose solutions, and implement them effectively. Strong communication skills are essential, as is the ability to work independently and proactively. A proven track record in blockchain development and previous experience with the Cosmos SDK are hig...

    $905 (Avg Bid)
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    Need to Build Token in solana 4 days left
    VERIFIED

    Token on solana Name : Make America Great Again Symbol: $Maga Supply : 1 billion Decimals : 9 Tax : 3% buy tax and 3% sell tax(3% to lp and 3% to marketing wallet) *Noone can hold more than 6.7%* (like a supply block) Marketing wallet : GQ5ZVUtoUeLvfAMmUxwMrSNnXacDYSwEZW2abJk2DKcW

    $141 (Avg Bid)
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    1 bids

    I'm seeking a skilled blockchain developer to design a decentralized finance application, primarily being a cryptocurrency exchange. While particular functionalities were not indicated, let's make sure the platform includes common features such as Buying/Selling Cryptocurrencies, Secure Wallets for Storage, and Real-Time Pricing Tracker. The ideal candidate will have significant experience in creating such platforms, an understanding of blockchain and DeFi, and a commitment to secure, seamless user experiences.

    $31 / hr (Avg Bid)
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    5 bids
    Need to build token on solana 3 days left
    VERIFIED

    Token on solana Name : Make America Great Again Symbol: $Maga Supply : 1 billion Decimals : 9 Tax : 3% buy tax and 3% sell tax(3% to lp and 3% to marketing wallet) *Noone can hold more than 6.7%* (like a supply block) Marketing wallet : GQ5ZVUtoUeLvfAMmUxwMrSNnXacDYSwEZW2abJk2DKcW

    $302 (Avg Bid)
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    4 bids
    Solana Token Builder Needed 3 days left
    VERIFIED

    Token on solana Name : Make America Great Again Symbol: $Maga Supply : 1 billion Decimals : 9 Tax : 3% buy tax and 3% sell tax(3% to lp and 3% to marketing wallet) *Noone can hold more than 6.7%* (like a supply block) Marketing wallet : GQ5ZVUtoUeLvfAMmUxwMrSNnXacDYSwEZW2abJk2DKcW

    $145 (Avg Bid)
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    I'm looking for a skilled freelancer to create a bespoke carbon trading website, specifically for Renewable Energy Certificates (RECs). The platform should also integrate a cryptocurrency wallet for our custom digital currency named "Gaga". The main functionalities that I require: - User registration and login system: Ensure that users can easily sign up and access their accounts securely. - Listing and trading of RECs: The platform should allow users to list their RECs and engage in trading activities. - Cryptocurrency wallet integration: The site should have a seamless integration with a cryptocurrency wallet for our digital currency, Gaga. Key Details: - Design: I'm envisioning a professional and corporate layout for the website. The design should be clean, modern,...

    $138 (Avg Bid)
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    I'm seeking a skilled blockchain developer to work on a project that involves creating a new contract and token on the TON blockchain. Key Responsibilities: - Develop the Smart Contract: You will be responsible for the design and development of a smart contract that aligns with the project's specific requirements. - Token Creation: You'll also need to create a new token on the TON blockchain. Requirements: - Expertise in blockchain development. - Proficiency in TON blockchain. - Previous experience in smart contract and token creation. - Strong understanding of blockchain security. Your work should adhere to basic security measures. Your experience in blockchain, particularly in TON, will be essential to ensure the integrity of the contract and token.

    $716 (Avg Bid)
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    I'm in need of a seasoned developer with experience in the Solana blockchain, preferably one who has previous experience in creating Solana SPL NFT contracts. I have already prepared the art works and meta data. The main components of the project include: - NFT Contract: The main request is the creation of a Solana SPL NFT contract. Understanding of SPL (Solana Program Library) contracts is crucial for this role. - Minting Website: The website should cater to both public and pre-sale minting. Experience in developing and integrating wallet functionality for such purposes is highly desirable. - Design: I'm looking to achieve a minimalist and clean design for the minting website. Past works that present a similar aesthetic would greatly improve your chances of successful applic...

    $626 (Avg Bid)
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    Hi, I would like a telegram software, multi wallet that buys and sells tokens on radyum and orca, where I indicate the token contract. The bot must allow the generation of different wallets, and I must be able to indicate how many wallets it must generate and must carry out a sale or purchase transaction for each wallet generated. You need to check @onenigger For example: 1) I launch the software 2) I suggest generating 3 wallets 3) Generate public address and private key 4) I send solana to these wallets 5) I send the contract to purchase 6) I decide on ryadium or Orca 7) For each wallet he must purchase the purchased token using 90% of the amount of sol 8) when I decide to sell the token, he must sell the entire amount of the token

    $813 (Avg Bid)
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    Need to build solana token 2 days left
    VERIFIED

    Token on solana Name : Make America Great Again Symbol: $Maga Supply : 1 billion Decimals : 9 Tax : 3% buy tax and 3% sell tax(3% to lp and 3% to marketing wallet) *Noone can hold more than 6.7%* (like a supply block) Marketing wallet : GQ5ZVUtoUeLvfAMmUxwMrSNnXacDYSwEZW2abJk2DKcW

    $712 (Avg Bid)
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    We are looking for a talented and experienced blockchain engineer to join our team and help us build the next generation of crypto trading tools. The project has been completed by 30%. So your main responsibility is to complete our crypto trading platform according to our requirements. - Responsibilities: o Develop and maintain our proprietary crypto trading platform. o Integrate with more crypto exchanges for data retrieval and order execution. o Enhance security and performance of the trading platform. o Collaborate with our team to define product features and roadmap. o Stay up-to-date with the latest developments in blockchain technology and crypto markets. - Requirements: o Bachelor's degree in Computer Science, Engineering, or a related field. o Proven experience i...

    $88 / hr (Avg Bid)
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    38 bids

    I'm seeking to thoroughly understand the concept of blockchain, particularly smart contracts, tokenization of assets, and the blockchain ecosystem. I currently have intermediate knowledge, and am eager to elevate it further. To clarify my needs: - Proficiency in one-on-one teaching, ideally involving complex technical content. - Expertise in blockchain technology, with a specific emphasis on smart contracts, tokenization of assets, and the blockchain ecosystem. - Ability to communicate properly and comprehensively through video conference. - Patience and understanding, considering my intermediate level of understanding. Applicants need to exhibit a deep understanding of the content and present it in an easy-to-understand format. Impress me with your approach and we might continue wi...

    $629 (Avg Bid)
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    I'm looking for an experienced blockchain developer with expertise in Ethereum smart contract API development. Key API features: - Ability to scan various smart contract code - Honeypot detection - Malicious code detection Required skills: - Proficiency in Solidity and Python - Blockchain development experience, particularly with Ethereum - Demonstrated expertise in API integration - Familiarity with security issues specific to smart contracts If you're a detail-oriented blockchain expert with crowdfunding experience, I'd love to hear from you.

    $26 / hr (Avg Bid)
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    I'm seeking an expert in Web3 and Solidity to lead me through practical exercises in Smart contract development, Decentralized applications (dApps), and Blockchain integration. The ideal candidate must be: - Proficient in Solidity and Web3 with a strong background in the deployment of smart contracts and dApps. - Capable of explaining complex concepts in an understandable way, and guiding through practical exercises, and have patience. - Experienced in real-world projects that demonstrate the successful application of blockchain technology. Given my basic knowledge in the field, I'm looking for a tutor who can help me further develop my skills through hands-on experience by guiding me through building a smart contract using 'ThirdWeb' SDK platform. I'm exc...

    $58 / hr (Avg Bid)
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    88 bids

    I'm seeking a skilled developer to create a carbon trading website for Renewable Energy Certificates (RECs) that will also feature the integration of a native digital currency called "gaga". Gaga will be pegged to a real-world value, for example, we can start at 1 Gaga = $1000. Users can use Gaga to buy and sell RECs and earn rewards for renewable energy initiatives. The currency should be seamlessly integrated into the website with user-friendly wallets and transaction interfaces, security and compliance are top priorities. Key Functionalities: Blockchain Integration: 1) Establish a secure system to record and verify renewable energy transactions. 2) Ensure the protection and immutability of all recorded data. API Development: 1) Create a communication link between the ...

    $37 (Avg Bid)
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    I am the head of a new unrecognized country, and we're in need of a seasoned blockchain expert to develop a national cryptocurrency. This digital currency will be overseen by our Royal Bank and the federal reserve. Key Requirements: - Security Measures: The development of the cryptocurrency must prioritize robust security to ensure the protection of our financial transactions from hacking, money laundering, and other banking financial crimes. - Scalability: The cryptocurrency should be able to scale effectively as our nation's economy grows and transactions increase. - Transparency: The system should be transparent, promoting trust and accountability in our financial systems. Creation of accounts: The ability for citizens, businesses, government officials and agencies, and roya...

    $4953 (Avg Bid)
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    I'm seeking a competent freelancer to develop a unique carbon trading website specifically for Renewable Energy Certificates (RECs). It needs to be user-friendly with easy registration and login, efficient REC trading facilities and integrated with a cryptocurrency wallet for our custom digital currency named "Gaga". The platform should be designed to accommodate three main user roles: 1. Trader 2. Investor 3. Administrator Each REC listed on the trading platform must display the following information: - The price of the REC - Quantity available - Seller's information Ideal candidates must possess expertise in web platform development, cryptocurrency wallet integration as well as a profound understanding of the carbon trading environment. Experience in projects r...

    $44 (Avg Bid)
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    I'm on the hunt for pre-built Web3 games. Further specifications of the game type were left open-ended, so any genre from collectibles, role-playing, to strategy games may be considered. Are you currently working on a Web3 Game? Did you already finish making a Web3 Game? Do you perhaps worked on a Web3 game before and own the rights? We are interested in 1. buying the code and rights 2. Or listing it on our platform This is a unique opportunity where you can sell your existing Web3 Gaming Project to us or list it on our platform. Write down the following: -Platform(s) of the game -Technologies you used to make the game -Concept and type of game (5-10 sentences) -Price estimate I'm NOT looking for someone to build a game from the start!!! You have to have an already working...

    $223 (Avg Bid)
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