Solidity is a programming language that is primarily used to create decentralized applications (dApps) and crypto tokens. It is used within the blockchain space to code, verify, and secure transactions on Ethereum-based networks. By hiring a Solidity Expert, they can write, debug and deploy various smart contracts on Ethereum as well as ensure compliance of their smart contracts with standards like ERC20 & ERC721 tokens.

Having a qualified Solidity Expert can bring you the peace of mind knowing that you are dealing with a subject matter specialist. has many skilled Solidity Experts who can help you build sophisticated software solutions with the highest of quality with their proficiency in writing efficient smart contracts in Solidity.

Here's some projects that our expert Solidity Experts made real:

  • Updating existing Smart Contracts
  • Developing financial bots and trading networks
  • Creating dApps on alternative blockchain networks
  • Designing new money transferring systems
  • Auditing pre-existing token protocols
  • Creating novel blockchain ecosystems
  • Developing NFT marketplaces

When it comes to blockchain coding and programming complex code, there is no better way to do it securely than using Solidity. With its ever increasing importance in many facets of decentralized technology, having an experienced Solidity Expert on your team could be the competitive edge you need. So why wait? Post your project now on and hire a Solidity Expert and create an unthinkable product or system!

From 20,253 reviews, clients rate our Solidity Experts 4.87 out of 5 stars.
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    18 jobs found, pricing in USD
    uml designer 6 days left

    I'm looking for a UML designer to help me to design diagrams for a blockchain based decentralised application. You should have some knowledge of blockchain and smart contracts , since the application is based on a public blockchain architecture. Primarily, I need system component diagrams. It is for a school project nothing major. The project will involve outlining the individual components of the system and developing a structure which can be assessed and understood more easily. You will need to have a good knowledge of UML diagrams to be able to accurately define this system in a diagram. It's important that you are highly experienced in designing class diagrams and creating diagrams for complex systems. I need someone who is able to work efficiently within the given timel...

    $92 (Avg Bid)
    $92 Avg Bid
    6 bids
    Flash USDT TRC20 6 days left

    We want the script/UI to do the following stuff: - Generate USDT Flash TRC20 Transactions - Define the time that the transaction can remain in the wallet - Define the charges of the blockchain networks for a quick confirmation - VPN and TOR options included with proxy - Option to show whether the transaction gets full confirmation or zero confirmations - Support all wallets - Segwit and legacy address - 100% confirmed transaction - Ability to spend bitcoins on any other address (Segwit address, legacy, Segwit / bch32) - Works with all wallets - Can be transferable wallet to wallet more than 2 times minimum Previous experience are preferred

    $300 (Avg Bid)
    $300 Avg Bid
    2 bids

    We want to build a script or explain a solution for dynamically calculating the buy / sell taxes of any valid ERC20 contract. Essentially user inputs a ERC20 token contract, how would we be able to calculate the buy / sell taxes of that contarct and every other erc20 contract? We want a "one fits all" solution. Skills and Experience: - Proficiency in Solidity programming language - Experience with ERC20 contracts and token creation - Knowledge of advanced security measures for smart contracts

    $37 / hr (Avg Bid)
    $37 / hr Avg Bid
    15 bids

    Number of Screen: 1. Login Screen 2. Create Account Screen 3. Forgot Password 4. Import Wallet 5. Home Screen 6. Send /Receive Coin Screen / Transaction 7. Transaction confirmation screen 8. Transaction List (tabs) 9. Token List 10. Add Network Screen 11. Modal popup Functions: 1. Create a function to create a EVM based wallet a. Return: Output mnemonic phrase 2. Create a function to restore wallet using mnemonic phrase 3. Create a function to encrypt private key using password 4. Create a function to create N number of wallet 5. Create a function to import wallet , input would be private key or keystore json. 6. Write a function to get balance of all wallets

    $250 - $750
    $250 - $750
    54 bids

    Hello. We are looking for Blockchain Development companies who are in a position to develop plenty of crypto projects. We are a network where we want to attract new crypto projects for fundraising. For more details, let's have a chat.

    $16 (Avg Bid)
    $16 Avg Bid
    5 bids
    IDO Launchpad 4 days left

    I am looking for a freelancer to provide IDO launchpad services with a timeline of 1-3 months. The services needed include technical development, including source code, admin panel, whitelisting-blacklisting, private and public sale, sales will have tier formatter . I have no specific technical requirements or features, so I am open to suggestions from the freelancer. The end goal is to have an IDO launchpad equipped with all the necessary features and set up correctly. If you think you have the skills and experience to complete this project successfully, please apply

    $7909 (Avg Bid)
    $7909 Avg Bid
    39 bids

    I am looking for a skilled developer to create a SWAP option for our new token v.s USDT (ERC-20). The purpose of this SWAP option is to attract new investors to our token. Project Requirements: - Develop a SWAP option that allows users to exchange our token for USDT. - The SWAP option should be built on the ERC-20 blockchain. - Implement necessary security measures to ensure the safety of the SWAP process. - The SWAP option should be user-friendly and intuitive. Ideal Skills and Experience: - Proficiency in blockchain development and smart contracts. - Experience with ERC-20 token development and integration. - Knowledge of liquidity pools and decentralized exchanges. - Strong understanding of security protocols and best practices. Timeline: - The completion of this proj...

    $1713 (Avg Bid)
    $1713 Avg Bid
    20 bids
    Create smart contract 3 days left

    Smart Contract Creation on Ethereum 0xb69edbD0527F448b650676C7085E15a7422791c5 Same contract on eth Name change total supply change - 10M Fixed tax Tax not modifiable Experience with stealth launch HTML experience

    $491 (Avg Bid)
    $491 Avg Bid
    53 bids
    Fix Bep20 token contract 2 days left

    I am having an issue with a Bep20 token contract not functioning as intended. It collects tax on sell, but it should also collect tax when buying tokens. I have the source code for the token contract, I just need the issue fixed.

    $26 (Avg Bid)
    $26 Avg Bid
    6 bids
    P2P Betting Blockchain DaPP 1 day left

    Project Title: P2P Betting Blockchain DaPP I am looking for a developer who can build a P2P Betting Blockchain DaPP using the Polygon blockchain. The ideal candidate should have experience and knowledge in working with Polygon and integrating it into decentralized applications. Features: - The DaPP should have peer-to-peer betting functionality, allowing users to place bets directly with each other. - It should also have smart contract functionality, enabling automated execution of bets and payouts. - Real-time transaction processing is essential to ensure smooth and efficient betting experience for users. Security: - The DaPP should have standard security measures in place to protect user data and funds. - Implementing best practices and industry-standard security protocols is crucial ...

    $750 - $1500
    $750 - $1500
    13 bids

    Develop a decentralised cricket betting website with help of blockchain

    $310 (Avg Bid)
    $310 Avg Bid
    3 bids

    I am looking for a skilled developer who can create a new token based on the BEP20 standard on the Binance Smart Chain. The purpose of this token is for fundraising, so it should have the necessary functionalities and features to support this goal. Ideal Skills and Experience: - Proficiency in blockchain development, specifically on the Binance Smart Chain - Experience in creating BEP20 tokens - Understanding of fundraising mechanisms and token economics - Ability to implement custom functionalities and features based on the client's requirements Please provide examples of previous token creation projects and any relevant experience in fundraising or token development.

    $12 / hr (Avg Bid)
    $12 / hr Avg Bid
    14 bids

    I'm looking for a full stack blockchain developer to create the algorithm and all logic for a slot machine to work in the Solana Blockchain! All webdesign/arts/drawings (figma) I'll provide, I just need the smart contracts and connections to be done by you/your team! We can discuss more details about the features/bonus/payout and etc of the slot machine.

    $512 (Avg Bid)
    $512 Avg Bid
    47 bids
    simple gaming blochchain 11 hours left

    I am looking for a developer to create a simple gaming blockchain project for me. This project will involve creating a price prediction game for desktop platforms. Requirements: - Develop a price prediction game on the blockchain - The game should be interactive and engaging - The game should have a desktop platform Skills and Experience: - Experience in blockchain development - Strong programming skills in desktop platforms - Knowledge of game development and design - Ability to create interactive and engaging gameplay

    $578 (Avg Bid)
    $578 Avg Bid
    49 bids

    I am looking for a skilled developer to create a BEP 20 Token Presale Smart Contract with a multi-level referral system. Programming Language: Solidity Multi-Level Referral System: - The referral system should have some specific features, but I am open to suggestions on what those features should be. Number of Referral Levels: 1-3 levels Ideal Skills and Experience: - Proficiency in Solidity programming language - Experience in creating smart contracts for token presales - Familiarity with multi-level referral systems and their implementation - Ability to suggest and implement appropriate features for the referral system If you have the necessary skills and experience, please submit your proposal along with your suggestions for the referral system features.

    $11 (Avg Bid)
    $11 Avg Bid
    7 bids

    I am looking for a developer to create a smart contract for a token on the Ethereum blockchain. Here are the details of the project: Blockchain Platform: Ethereum - The smart contract should be developed on the Ethereum blockchain platform. -Another contract for revenue distribution. Token Functionalities: Tax - 5% buy and sell Tax should be converted to ETH when the tx is completed Deploy on testnet first Deploy on Main net Ideal Skills and Experience: - Experience in developing smart contracts on the Ethereum blockchain platform. - Strong knowledge of Solidity programming language. - Familiarity with ERC-20 token standards and other relevant Ethereum standards. - Ability to implement the specific functionalities required for the token. - Ability to deliver the project within a sh...

    $13 / hr (Avg Bid)
    $13 / hr Avg Bid
    58 bids
    Copy of unibot 1 hour left

    Looking for a ready made code which I can buy today. NOT looking for new development. Should work on DEX and eth chain. Should work on telegram UI

    $2558 (Avg Bid)
    $2558 Avg Bid
    29 bids
    INFINITY BOX EVOLUTION -- 2 15 hours left

    Presiso de um contrato inteligente no blockhain da rede polygon sistema de doações .de pessoa a o frontend. E bek end. .criar o contrato na teste nete e integrar ao front end .para que eu possa testar tudo

    $502 (Avg Bid)
    $502 Avg Bid
    12 bids

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