Blockchain Jobs

Blockchain, is a technology that encompasses digital records or information, referred to as “blocks”, that are linked together securely and share the same network. This distributed ledger technology is the backbone of a new wave of innovation being implemented into our lives, with new disruptive applications and solutions seen in a growing number of industries. Clients may hire a Blockchain Developer to harness this power and build a secure digital platform tailored to their business needs.

A Blockchain Developer can create unique solutions leveraging blockchain technology to securely store, access, mine and distribute data in an efficient manner. They can leverage features such as blockchain tokens for payments, smart contracts for automated transactions, privacy layers and data protection techniques. Additionally, the expertise of a Blockchain Developer will ensure the project complies with industry standards, ensuring secure data and validation.

Here's some projects that our expert Blockchain Developer made real:

  • Creation of custom applications for fast and secure NFT (Non-Fungible Token) transactions
  • Developments of tools that allow synchronization with physical products using Bluetooth protocol
  • Integrations between wallets hosting cryptographic assets with ecommerce providers
  • The establishment of exploratory networks to provide insights into decentralized ecosystems
  • Developments to foster the growth of peer-to-peer energy trading networks

At Freelancer.com customers have posted amazing projects covering a variety of use cases related to blockchain utilising the Freelancer verified experts. With help from professionals on Freelancer.com customers can create unique projects addressing their business needs with safety, security and legality in mind. Rock your blockchain project today and hire an expert Blockchain Developer on Freelancer.com now!

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    80 jobs found, pricing in NZD

    I'm seeking a seasoned developer with extensive experience in the Cosmos SDK. The project entails a range of tasks including wallet integration, blockchain development and smart contract deployment. Your primary focus will be ensuring these are seamlessly integrated into the platform. Key Responsibilities: - Implement Wallet Integration: You must have a thorough understanding of how to integrate wallet services into the Cosmos SDK. - Develop Blockchain: Experience in developing blockchains using the Cosmos SDK is essential. You will be responsible for creating a robust and secure blockchain. - Deploy Smart Contracts: Your expertise in deploying smart contracts using the Cosmos SDK will be crucial to this project's success. Deliverables: - Seamless integration of wallet services...

    $937 (Avg Bid)
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    24 bids

    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

    $300 (Avg Bid)
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    4 bids
    Solana Token Builder Needed 1 day 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

    $144 (Avg Bid)
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    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,...

    $137 (Avg Bid)
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    I'm in need of an experienced developer who can create a USDT flashing software for me. This software will primarily be used for testing purposes, so it doesn't need to execute real transactions. Key Requirements: - Develop this software to work specifically on Windows platform. - It should be capable of simulating USDT transactions with balance display features. - The software should be user-friendly and easy to use, suitable for my testing needs. Ideal Freelancer: - Experience with cryptocurrency development, specifically with USDT and blockchain technology. - Proficient in software development and testing. - Prior experience in creating similar software will be an advantage. Please provide any example projects and demonstrate your expertise in the field. Looking forward t...

    $593 (Avg Bid)
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    I am seeking a proficient and experienced Cosmos SDK professional. The primary objective is to integrate the Cosmos SDK with our existing web application. Key Responsibilities: - Utilize your understanding of blockchain technology to seamlessly integrate Cosmos SDK with our web application. - Ensure that the integration enhances the performance and functionality of our platform. - Collaborate with our team to implement the integration in a timely manner. Ideal Skills and Experience: - Deep knowledge of blockchain technology, specifically in relation to the Cosmos SDK. - Proficiency in Golang programming language to effectively carry out the integration. - Prior experience in integrating the Cosmos SDK with existing web applications. - Good communication skills and a collaborative workin...

    $1240 (Avg Bid)
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    [READ BEFORE BIDDING PLEASE] I’m looking for an expert in decentralized finance (DeFi) to build a swap&bridge platform on Base using OP stack Superchain. This project needs to be completed as soon as possible. Key Specifications: - Using latest version - The platform should feature token swapping and Bridge functionalities. - Responsive on pc browser and on phone - The system should allow users to seamlessly swap various tokens. - While I haven't identified specific token standards yet, your suggestions based on prior experience are welcomed. Desired Skills and Experience: - Experience building DeFi swap sites. - Understanding of OP Superchain. - Effective communication and timely delivery.

    $829 (Avg Bid)
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    111 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.

    $703 (Avg Bid)
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    74 bids

    I'm looking for a seasoned blockchain expert, particularly one with considerable expertise with custom blockchain development.

    $920 (Avg Bid)
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    56 bids

    As an individual beginning a new project, I'm seeking a skilled blockchain expert proficient in Solidity. Your role will encompass the development of a custom blockchain solution on the Ethereum platform. Skills and Experience: - Strong proficiency in Solidity programming - Comprehensive knowledge of how Ethereum works - Proven experience in custom blockchain development - Be able to offer expert blockchain consultation as needed - Previous experience with Ethereum is highly desirable By joining this project, you'll have the opportunity to work on an exciting new project while using latest technologies. Your expertise and advice will be invaluable in creating a secure and efficient system.

    $25 / hr (Avg Bid)
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    45 bids

    I want to scrape the website for data and present it on my website. I want to show the marketcap and prices for 4 cryptocurrencies. I want them to update in real time and present in a bar chart as if they are competing against each other.

    $240 (Avg Bid)
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    112 bids
    Need to build solana token 17 hours 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

    $708 (Avg Bid)
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    5 bids

    We would like to create a Dune Dashboard for a token project, with the following data, which is all onchain. Keep in mind that the token is on four different chains: Ethereum, Solana, BNB, and BASE): -price -total market cap -total number of token holders -line chart of total number of token holders over time -number of holders on each chain (as pie chart) -total 24h volume -24h volume on each chain (as pie chart) -total 24h token revenue (this is simply 1% of total volume on Ethereum) -total amount of donations made by project (all onchain) -total number of NFTs owned by DAO (they are all in a single address) -Price of X at the market cap of Y for three tokens (this will show what the price of the token would be if it had the current market cap of three different tokens) Looking for som...

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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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    I am in need of a skilled blockchain expert who can develop an efficient security API for me. Despite the specifics not being defined yet, I envisage that the APIs will need to offer robust security features. Thus, experience in scalable security infrastructure could be beneficial. Ideally, you will: * Be proficient in Solidity programming - it's crucial for this project. * Have a deep understanding and experience with API security. * Have the ability to design an API with robust security features. * Provide value from the experience to incorporate advanced features. If you possess these skills and have an innovative mindset, please make a bid. While not necessary, including past work, detailed project proposals or relevant experience that you have had could increase your chances o...

    $22 / hr (Avg Bid)
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    22 bids
    Polygon Smart Contract Audit 12 hours left
    VERIFIED

    We are looking for an expert in smart contracts, specifically those deployed on the Polygon blockchain. Your application should include past work that demonstrates your experience in this field.

    $899 (Avg Bid)
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    125 bids
    Need to complete project 11 hours left
    VERIFIED

    I have a pre-sale project. Staking, pooling, and governance must be completed. It is not yet complete and has not been deployed to servers. If you have good experience, please check the project and let me know the budget and time to complete the project. Share the repository. And I would like to hear your advice to complete the project successfully. I want to finish it within 3 months. Requirements Technologies: Frontend, Blockchain, Web3, Backend, Database, Solidity, API Integration. thank you

    $39 / hr (Avg Bid)
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    I'm in need of a skilled full stack developer with experience in blockchain integration. The project involves creating a standalone escrow crypto payment gateway. Key Requirements: - Proficiency in Blockchain Integration: You should be adept at integrating blockchain technology into a payment gateway. - Experience with Multiple Cryptocurrencies: The payment gateway will support USDT Bep20, Matic, BNB, and SQD Token. You should have experience working with these and have a solid understanding of how to integrate them into the system. The ideal candidate should be well-versed in security protocols, have a good understanding of decentralized finance (DeFi), and have a proven track record of successful blockchain integration projects.

    $9114 (Avg Bid)
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    I'm seeking a competent blockchain developer with strong experience in creating smart contracts on the Ethereum network, or what I refer to as the base network. The primary objective of this project is the automation of financial transactions. This smart contract should be proficient in not only automating these transactions but should also possess the ability to interact with other smart contracts for the seamless execution of transactions. Possessing a keen understanding of the technical aspects involved in swapping one type of token for another, and staking and unstaking tokens would be beneficial but it's not a requirement for this particular job. IDEAL SKILLS AND EXPERIENCE: - Extensive experience in developing smart contracts on the Ethereum network - Proficient in Soli...

    $284 (Avg Bid)
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    8 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...

    $626 (Avg Bid)
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    6 bids

    I'm looking for a Full Stack Developer experienced in blockchain technology and game development to create a web-based game utilizing Ethereum's blockchain, Node.JS, and wallet integration. The game should incorporate the following functionalities: The game now uses backend for the whole mechanism, but I want to make it more decentralized by using smart contract. As you can check on the game, it uses input wallet address and this kind of operation is not comfortable for users. So I want to integrate wallet connect feature on the game. Are you able to implement all of these features? It could be MetaMask, Coinbase, TrustWallet, Rainbow. Please check our current codebase. - Blockchain Technology: Implement blockchain technology to enhance user experience and security. - Node.JS: ...

    $63 / hr (Avg Bid)
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    I'm seeking a blockchain expert with proficient knowledge and practical experience in Ethereum to build a Decentralized Application (DApp) with the aim of serving the voting industry. Key Responsibilities: - Develop, design and test the Ethereum DApp - Ensure the application is secure and user-friendly - Maintain and improve the application constantly - Deploy the DApp on Ethereum network Necessary Skills: - Extensive knowledge of Ethereum blockchain, as well as related tools and technologies - Experience in coding Smart Contracts - Proven experience in creating DApps, ideally in the voting or related sectors - Excellent problem-solving skills - Detail-oriented with strong analytical skills If you have a keen understanding of the challenges linked to blockchain deployment and a ...

    $384 (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.

    $25 / hr (Avg Bid)
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    Blockchain Expert NEEDED -- 6 1 hour left
    VERIFIED

    I'm looking for a blockchain expert who can build custom blockchain using Cosmos SDK.

    $32 / hr (Avg Bid)
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    50 bids

    I am urgently seeking an expert in Cosmos SDK to build a custom blockchain with particular functionalities. The primary goal being the implementation of a voting system, staking mechanism, and token issuance. Desired skills and experience include: - Proven expertise with Cosmos SDK - Experience building custom blockchains - Understanding of blockchain voting and staking mechanisms - Token issuance know-how Please note, the expected timeframe for this project is immediate. I am looking for professionals who can start working on the project right away and deliver high-quality results. Your promptness will be greatly appreciated.

    $1297 (Avg Bid)
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    I'm in need of a highly skilled developer, with a deep understanding of Cosmos SDK to build a custom Blockchain for me. Specific Requirements: - First and foremost, the Blockchain must support smart contracts, this is the key functionality I require. - I have opted not to specifics on the type of smart contracts at this time, this can be further discussed during the project development phase. Project Timeline: - I need my project completed within a month, hence swift and efficient service is essential. Ideal Candidate: - An expert in Cosmos SDK. - Extensive experience in building custom Blockchain. - Understanding of smart contracts in Blockchain. - Good communication skills, be able to work within set timelines.

    $27 / hr (Avg Bid)
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    I'm looking for a solana developer. Your task is to create custom spl token. I'll give you data about spl token in detail through chat. But only you have a experience in creating custom spl token, bid please.

    $910 (Avg Bid)
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    Se requiere: - Elección de la plataforma blockchain - Instalación del software blockchain - Configuración de los nodos - Conexión de los nodos - Configuración del consenso - Configuración de la seguridad - Configuración de la escalabilidad - Pruebas y optimización - Documentación y mantenimiento

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    EL bot debe poder operar en varios DEX usando flashloans como caracteristica pricipal, las oportunidades de las transacciones las debe buscar en los mempool de los contratos inteligentes de cada DEX. Tambien debe poder hacer frontrunning de las transsacciones The bot must can operate on many DEX using flashloans like principal function, the oportunities of transaction have to look for in the mempool of the Contratcs of the DEX. must can do frontrunning,and sandwich attack

    $252 (Avg Bid)
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