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. Freelancer.com 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 Freelancer.com and hire a Solidity Expert and create an unthinkable product or system!

From 26,542 reviews, clients rate our Solidity Experts 4.88 out of 5 stars.
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    16 jobs found, pricing in USD

    Smart contract token on Ethereum or better yet Polygon/Pulsechain. Token circulating supply should always be equal to US national debt. If not always then at least every day/week it updates and mints new tokens so it wouldn't lag behind too much behind US national debt. This can be done manually, its perfectly fine. We can have special function just for minting additional tokens, then the tokens get sent to special staking pool from which stakers will get rewards. So this inflation should be given out to all stakers. People stake their tokens and then every day/week they get this new inflation rewarded to them proportional to the amount they staked. So if someone staked bigger amount, then he gets bigger share of this inflation. Thats in short basically, theres few additional things...

    $213 (Avg Bid)
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    1 bids

    1. A simple NFT contract and a web app to mint. The coding is not important, as long as it works. Let's call this collection NFT #auctioneer. This can be done very simply based on 2. A smart contract written in Solidity to auction any EIP-721 NFT on the Ethereum (except NFT #auctioneer), with following requirements. 2.1. The auction can only be started by a the owner of NFT#auctioneer. The auction is associated with an instance of NFT#auctioneer (see 2.3 and 2.7) 2.2. Let's call the NFT for sale NFT#sale. When the auction has started, the NFT#sale is locked by the contract, so seller cannot transfer it. 2.3. Auction should have a minimum amount and minimum active period. If and only if there is no bid after the minimum active period, can current owner of NFT#auctioneer cancel t...

    $250 - $750
    Sealed
    $250 - $750
    41 bids

    hey we are hiring both solidity devs and full stack devs with solidity experience. Please specify which role you are interested in we are integrating eth donations into our platform to support charities. This involves developing smart contracts, integrating with our existing system, and ensuring secure transaction data handling. Requirements: Ethereum Address Management: Develop a smart contract for a single Ethereum donation address. Securely track donations and user info. Processing Donations: Monitor and confirm incoming transactions. Update donation status in real-time. Display donation status with notifications. Transaction Data Recording: Log transaction details securely. Provide an admin interface for data review. Security Measures: Implement end-to-end encryption. Conduct re...

    $15666 (Avg Bid)
    Featured
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    Description: We are seeking a skilled blockchain developer to build a bridge that connects BRC-20 tokens on the Bitcoin blockchain to another token. The specifics of the target blockchain and token will be discussed during the interview. This project involves creating a Minimum Viable Product (MVP) within a tight deadline of 4 days. ----------(((( YOU WILL BE ASKED TO DEMONSTRATE YOUR PREVIOUS BRC-20 BRIDGE DEVELOPMENT ))))--------------------- Responsibilities: Set up the development environment, including necessary tools and local testnets. Develop smart contracts for BRC-20 token locking and equivalent token minting and burning on the target blockchain. Deploy smart contracts to testnets. Create a backend service using Node.js to handle communication between the two blockchains. Imp...

    $754 (Avg Bid)
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    106 bids
    BTC/USDT Flasher 5 days left
    VERIFIED

    I need a desktop application that will Flash BTC/USDT and display the flash Coin Value in usd. The project will involve: - Developing a Flashing Software. - Creating a flasher that will display the coins value in the receiving wallet. I would prefer the software to be easy to use and intuitive for a non-technical person to operate. Ideal Skills: - Experience in Blockchain development and smart contracts deployment. - Familiarity with cryptocurrency and web3 wallets. - UI/UX design skills for creating an intuitive and user-friendly interface.

    $582 (Avg Bid)
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    7 bids

    Smart Contract for Referral Rewards on our platform Overview: This Solidity contract tracks referrals and distributes tokens as rewards. Objectives: Track referrals, distribute rewards, ensure security, and integrate with the platform. Requirements: 1. Referral Tracking: Map to store referrals, register new users, validate referrers. 2. Reward Distribution: Calculate and distribute rewards, secure transfers. 3. Security: Access control, prevent double spending, optimize gas usage. 4. Integration: Collaborate with developers, test on testnet, provide documentation. Timeline: - Design (1 week) - Development (2 weeks) - Testing (1 week) - Deployment (1 week) Total: 5 weeks.

    $8079 (Avg Bid)
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    15 bids

    I need an urgent help of a Web3 developer to complete a project. The task is to link the frontend of a decentralized exchange, similar to Uniswap or Pancakeswap, to the smart contracts that are already deployed on the Cic blockchain. Key Responsibilities and Requirements: - Connecting the frontend of the exchange to the smart contracts on the Cic blockchain. - A solid understanding of how decentralized exchanges operate. - Proficiency in EVM-compatible blockchain development. - Experience in working with Web3 and decentralized finance protocols. - Ability to work under tight deadlines and deliver quality results in a timely manner. The project is time sensitive, so the chosen freelancer should be able to start immediately and commit to a quick turnaround. Your expertise in this area wi...

    $820 (Avg Bid)
    $820 Avg Bid
    67 bids

    I have developed a token on the TRON blockchain and I am looking for an experienced developer to create an automated system for adjusting the token's price based on my trading performance in financial markets. The main objective is to dynamically adjust the token's value according to the profit and loss from my trading activities. Requirements: Integration with Trading Platforms: Develop an API or script that connects to my trading accounts on various financial markets. Retrieve real-time trading data including profits and losses. Price Adjustment Algorithm: Create an algorithm that adjusts the token's price based on the retrieved trading data. Ensure the algorithm accurately reflects my trading performance in the token price. Smart Contract Development: Modify the exis...

    $392 (Avg Bid)
    $392 Avg Bid
    4 bids
    BNB Chain MLM Smart Contract 3 days left
    VERIFIED

    I'm looking for a developer who can create an MLM project on BNB Chain using a smart contract. The project requires users to register via a unique link code, and then engage in product purchases that will be managed through the smart contract. Key project components: - Development of a smart contract on BNB Chain - User registration via unique link codes - Integration of product purchases within the smart contract The smart contract should support: - Referral system management - Automated payments to users - Efficient product purchase tracking Ideal skills for this project include experience in: - BNB Chain development - MLM project development - Proficiency in creating and managing smart contracts - Knowledge of referral system management frameworks - Experience with automated pa...

    $10 / hr (Avg Bid)
    $10 / hr Avg Bid
    41 bids
    Create flash USDT 22 hours left
    VERIFIED

    I am looking for experts blockchain developer who can create USDT Flask. Here the condition is usdt should be transferable between wallets and the value of usdt will be shows in whichever wallet usdt is shared. If you can do this work kindly reach out to me asap. Thank you

    $21811 (Avg Bid)
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    7 bids

    hey we are hiring both solidity devs and full stack devs with solidity experience. Please specify which role you are interested in we are integrating eth donations into our platform to support charities. This involves developing smart contracts, integrating with our existing system, and ensuring secure transaction data handling. Requirements: Ethereum Address Management: Develop a smart contract for a single Ethereum donation address. Securely track donations and user info. Processing Donations: Monitor and confirm incoming transactions. Update donation status in real-time. Display donation status with notifications. Transaction Data Recording: Log transaction details securely. Provide an admin interface for data review. Security Measures: Implement end-to-end encryption. Conduct ...

    $15606 (Avg Bid)
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    33 bids

    I'm in need of an experienced full stack developer to build a new website. The ideal candidate should be proficient in JavaScript, Python and Ruby. Key requirements: - Proficient in JavaScript, Python, and Ruby - Experienced in creating new websites - Previous experience in full-stack development Your main focus will be to turn my ideas into a fully functional and user-friendly website. Your input on best practices and technologies is also welcome. A strong portfolio of previous work is a big plus. Looking forward to collaborating with you.

    $1175 (Avg Bid)
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    106 bids

    I require top-notch talent experienced in AI and Blockchain development who will help in establishing a smart contract platform using solidity. Key Responsibilities: - End-to-end AI development - Creation of Ethereum-style blockchain structure - Integration of both AI and blockchain technologies for a seamless operation Ideal Skillset: - Proven experience in AI programming - Extensive development experience with Solidity - Prior work on blockchain and AI integrations - Understanding of blockchain's application in smart contract platforms The primary outcome of this project is the creation of an effective smart contract platform, training AI on a blockchain. I'm searching for a committed and proactive individual with a deep understanding of these technologies...

    $5443 (Avg Bid)
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    37 bids
    Trophy icon Tron Smart Contract Developer 4 days left

    We are looking for a skilled Tron developer to join our team and help develop a smart contract for a wallet application. The ideal candidate should have experience with Tron blockchain development and be familiar with BIP 39 or BIP 44 for address generation. Responsibilities: 1) Develop a smart contract on the Tron blockchain for a wallet application. 2) Implement functionality for address generation using BIP 39 or BIP 44. 3) Ensure that fees for all wallet transactions, including sending TRX or any ERC10 or ERC20 tokens, are deducted from a specified multiple accounts assigned in the smart contract, and not from user. 4) Also user need to pay the fees to the contract as an escrow, i.e. user will not pay the transaction fee, the transaction fee will be paid by the assigned accounts in ...

    $1000 (Avg Bid)
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    ### Descripción del Proyecto: Desarrollo y Optimización de un Bot de Arbitraje con Flash Loans #### **Objetivo del Proyecto:** Contratar a un desarrollador experto en Solidity y finanzas descentralizadas (DeFi) para perfeccionar y optimizar un bot de arbitraje que utiliza préstamos flash (flash loans). Nuestro bot actual ya cuenta con una amplia gama de funcionalidades avanzadas, pero buscamos mejorar su eficiencia, seguridad y capacidades automáticas. #### **Descripción General:** Nuestro bot de arbitraje está diseñado para detectar y ejecutar oportunidades de arbitraje entre diferentes intercambios descentralizados (DEXes) utilizando préstamos flash desde plataformas como Aave. El objetivo es aprovechar las diferencias de precios ...

    $334 (Avg Bid)
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    Busco a una persona experta en desarrollo blockchain que ocupe el puesto de CTO en una empresa que es un fondo de inversión descentralizado. Debe tener conocimientos tecnológicos sobre cripto y desarrollo blockchain y las habilidades necesarias para ocupar un puesto directivo. Debe hablar Español.

    $18344 (Avg Bid)
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    26 bids

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