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 25,034 reviews, clients rate our Smart Contracts Experts 4.85 out of 5 stars.
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    30 jobs found, pricing in AUD

    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...

    $10 - $90
    $10 - $90
    0 bids

    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...

    $758 (Avg Bid)
    $758 Avg Bid
    15 bids

    I need a blockchain developer who is proficient in Ethereum and has a solid experience in developing Smart Contracts. The project primarily focuses on Finance/DeFi. Key Responsibilities: - Create and deploy secure and efficient Ethereum Smart Contracts - Work on the DApp's primary purpose, designed for Finance/DeFi Ideal Skills: - Proficiency in Ethereum blockchain technology - Strong experience in developing Smart Contracts - Good understanding of Finance/DeFi use cases - Ability to create secure and efficient code - Knowledge of Ethereum tools and frameworks Your work will be crucial in ensuring the success of the DApp and its primary functionality in the Finance/DeFi sector. Im looking to find a Blockchain developer that would be excited and interested to help build a MEV bot t...

    $4088 (Avg Bid)
    $4088 Avg Bid
    17 bids
    Need to Build Token in solana 6 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

    $128 (Avg Bid)
    $128 Avg Bid
    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.

    $28 / hr (Avg Bid)
    $28 / hr Avg Bid
    5 bids
    Need to build token on solana 5 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

    $244 (Avg Bid)
    $244 Avg Bid
    5 bids
    Solana Token Builder Needed 5 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

    $131 (Avg Bid)
    $131 Avg Bid
    2 bids

    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,...

    $125 (Avg Bid)
    $125 Avg Bid
    4 bids

    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.

    $633 (Avg Bid)
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    74 bids

    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...

    $562 (Avg Bid)
    $562 Avg Bid
    114 bids

    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

    $724 (Avg Bid)
    $724 Avg Bid
    52 bids
    Need to build solana token 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

    $645 (Avg Bid)
    $645 Avg Bid
    5 bids

    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...

    $80 / hr (Avg Bid)
    $80 / hr Avg Bid
    36 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...

    $311 (Avg Bid)
    $311 Avg Bid
    5 bids

    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.

    $23 / hr (Avg Bid)
    $23 / hr Avg Bid
    28 bids

    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...

    $52 / hr (Avg Bid)
    $52 / hr Avg Bid
    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 ...

    $34 (Avg Bid)
    $34 Avg Bid
    2 bids

    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...

    $4548 (Avg Bid)
    $4548 Avg Bid
    26 bids

    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...

    $40 (Avg Bid)
    $40 Avg Bid
    2 bids

    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...

    $202 (Avg Bid)
    $202 Avg Bid
    30 bids
    Build solana token 2 days left
    VERIFIED

    I need to build solana token, with specific details 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)

    $140 (Avg Bid)
    $140 Avg Bid
    7 bids

    I am seeking an experienced blockchain developer with strong knowledge in BSC Smart Contracts to help me build an engaging affiliate program. This project requires a robust strategy to increase user adoption and revenue. The main goal will be community building to drive user adoption. While the specific strategy was not provided in the brief, potentially effective methods could include social media engagement, forums, and events. Therefore, the ideal candidate should have: -A proven track record in creating successful affiliate programs -Proficient in social media engagement and creating online forums -Experience in hosting digital events and meetups I need someone who can begin immediately and the turnaround time should be prompt, as the completion of this project is ASAP.

    $125 (Avg Bid)
    $125 Avg Bid
    5 bids

    I am in need of an expert to develop an affiliate program on the Binance Smart Chain (BSC) platform. The key function of this program is to facilitate a multi-level marketing system with a depth of 10 levels. Key Features: - Multi-Level Marketing: The system must support a network of affiliates up to 10 levels deep. Ideal Candidate: - Deep understanding of Smart Contracts within the Binance Smart Chain ecosystem. - Proven experience in creating multi-level marketing systems. - Able to deliver within a reasonable timeframe.

    $149 (Avg Bid)
    $149 Avg Bid
    5 bids

    I am in need of a proficient developer who can provide crucial updates to my MultiChin DApp interface supporting Ethereum and Binance Smart Chain protocols. Key Responsibilities: - Layout alterations, color scheme changes, and font style modifications are required for a full UI/UX revamp. - Implement affiliate marketing system that gives the marketer a link with code. if someone for example buys 1000$ value of tokens with that link, the marketer gets 5% back to his wallet. which is 50$. and a page for the history of purchases for the marketer, we'll go in-depth later. - fixing the existing smart contract. Ideal Skills & Experience: - Robust understanding of Ethereum and Binance Smart Chain protocols. - Expertise in smart contract development. - Strong experience in front-end...

    $3671 (Avg Bid)
    $3671 Avg Bid
    50 bids

    I'm looking to build a tax-based token on the Solana network. Ideally, this project would be executed using the Rust programming language due to the client's preference and Solana's compatibility. Since specific functionalities have been skipped, I'd welcome inputs from experienced developers in the same area who can suggest features for this kind of token. Expertise in Solana development and tax-based token creation would be preferred.

    $174 (Avg Bid)
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    4 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

    $66 / hr (Avg Bid)
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    12 bids

    I'm looking for someone experienced in building tokens on the Solana network. This is not simply a basic token creation job. I will need some added features and a developer who knows their way around custom functionalities. Key Requirements: - Implement a 6% tax system on transactions. - Limit the maximum token holding to 6.7. - Direct listing support required, so the ability to work with listing processes will be beneficial. The functionality of the token does not need to be extensive or overly complex. Mainly, I am keen on the developer being fluent in the Solana platform and having a firm understanding of token creation. Preferably, you should have past experience in creating tokens with custom rules and features. Let's connect if you have the right skills, I'm excited ...

    $168 (Avg Bid)
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    4 bids
    Polkadot Blockchain Developer 19 hours left
    VERIFIED

    We are seeking a highly skilled and dedicated blockchain developer, with a strong emphasis on Polkadot, to pioneer the development of a revolutionary Decentralized Privileged Access Management (DPAM) solution. This is an exciting opportunity to be a core contributor in the initial development phases of a project with the potential to transform the cybersecurity landscape. In this role, you will work closely with us to understand the project requirements and translate them into robust and efficient blockchain solutions built on Polkadot. You will leverage your solid understanding of Polkadot, blockchain technology, and associated protocols to create innovative solutions that prioritize security and reimagine the way privileged access is managed. Your primary responsibilities will include:...

    $35 / hr (Avg Bid)
    $35 / hr Avg Bid
    61 bids

    I need a proficient developer well-grounded in blockchain technology and notably in Ethereum. My project majorly revolves around: - Smart contract development The tasks entail: - Creating, testing, and implementing Ethereum smart contracts For this job, the ideal candidate will: - Be an expert in blockchain technology with an emphasis on Ethereum. - Be proficient in Solona as the preferred programming language for the smart contract development. - Have a deep understanding and working experience in smart contract development and testing. - Be capable of integrating the smart contract into the existing system seamlessly and securely. Kindly share your previous works related to Ethereum smart contracts in your proposal. Expected freelancers should ensure they meet up with the outlined re...

    $260 (Avg Bid)
    $260 Avg Bid
    18 bids

    We're seeking an expert in creating Ethereum-based smart contracts. Your role involves developing detailed, secure smart contracts for deployment on the Ethereum platform. Key responsibilities include: - Developing Ethereum smart contracts - Ensuring the security and efficiency of the smart contracts - Integration of smart contracts with our existing web application The ideal candidate has an in-depth understanding of Ethereum blockchain and Solidity, experience with code testing and a well-rounded knowledge of web development languages. Previous work experience in a similar role and a proactive problem-solving approach will be considered a plus. Please ensure to provide your past work samples along with your bid.

    $353 (Avg Bid)
    $353 Avg Bid
    25 bids

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