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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    39 jobs found, pricing in USD

    I need to check the Add Liquidity, Farming, and Stake functions and make Launchpad on EVM (Linea, ETH, and zkSync). Your main responsibilities include: - Enhancing the efficiency of the aforementioned functionalities. - Thoroughly checking these functions to ensure they are operating optimally.

    $1287 (Avg Bid)
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    8 bids

    I am in need of highly skilled developers to create an MEV Bot on the Solana chain via Raydium, utilising the Sandwich strategy. Proficiency in programming languages such as Python, Rust Key Project Requirements: - Ensuring swift transaction speeds - Developing the bot's ability to identify opportunities Applicants must provide a detailed project proposal outlining their intended approach and strategies. The successful applicant will have demonstrated an understanding of the project goals and the capacity to deliver a high-performing MEV bot. Strong experience in blockchain development and bot creation will be highly regarded.

    $324 (Avg Bid)
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    24 bids

    I'm in need of a seasoned blockchain developer to create a bridge with Solana and DINT that supports cross-chain transactions and token swaps. Key Features: - Cross-chain transactions - Token Swaps Security Measures: - Smart contract auditing is required to ensure that the contracts function as intended with no vulnerabilities. - Implementation of multi-factor authentication, minimising the risk of unauthorised access and enhancing the overall security of the bridge. Ideal Skills/Experience: - Extensive experience with the Solana Blockchain platform. - Proven track record of developing secure and efficient bridges between different blockchain networks. - Skilled in smart contract auditing and implementation of authentication methods.

    $668 (Avg Bid)
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    We are seeking a talented and experienced Blockchain Developer or a team of developers to upgrade our existing Roulette Game project to incorporate blockchain technology. The successful candidate(s) will play a pivotal role in enhancing the game's security, transparency, and overall user experience by implementing cutting-edge blockchain solutions. Responsibilities: Collaborate with the existing development team to understand the current architecture and functionality of the Roulette Game project. Analyze and identify areas of improvement in the game's security, fairness, and user experience. Design and implement blockchain-based solutions to enhance the game's functionality, transparency, and reliability. Integrate smart contracts into the game's logic to ensu...

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    Operator required for which is being created as as part of the Digitizing Trade network. would feature a platform for private trade blockchains created by the operator laid our along the lines of what is at Blockchains.Business. is the prime internet brand for Trade Blockchains. It is a valuable resource that will appreciate in value. The intention would be for the operator to build it up as a primary resource on the web for private Business Blockchains, something that is becoming very necessary indeed for many org#anizations. Blockchain and smart contracts Services offered by the operator will also be featured at . The operator would be the exclusive provider of blockchain /smart contract services featured at Private blockchains are exclusively accessible and controlled by a sin...

    $30 / hr (Avg Bid)
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    My team and I are envisioning a BSC token linked to Yield Farming. We haven’t yet created a whitepaper for this project, hence the ideal candidate will have experience in writing comprehensive, informative whitepapers and translating abstract ideas into clear and concise documentation. I also need someone to develop the token itself. The token will have a unique feature of Reflective Holding Rewards, setting it apart from existing ones. Expert knowledge on this mechanism will be highly beneficial. Potential candidates should: - Have significant experience in BSC token creation, particularly in the Yield Farming area - Be knowledgeable and competent in publishing tokens on the Binance platform - Possess strong writing skills for crafting an impactful whitepaper - Have experience ...

    $454 (Avg Bid)
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    I'm in need of a skilled web3 developer who's especially proficient in Laravel and JavaScript for a DApp project. Our application requires an integrated blockchain for secure and reliable processing and a DApp for decentralized control. Features to be implemented are: - User authentication - Payment system tailored toward accepting payments for goods/services Experience and Skills Needed: - Proficiency in Laravel and JavaScript is a must - Proven experience in blockchain integration, preferably in DApp projects - A strong understanding and prior work history of integrating payment systems. This project will center around enabling transactions for goods and services. Therefore, expertise in creating a robust payment system is crucial. Applicants must be able to wor...

    $35 / hr (Avg Bid)
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    Here is an example of what I want: When you press connect you will see what it asks you, if you download trust wallet or metamask you will see it takes you to the app of the wallet you select I want it to have these functionalities: ➖-Multi chain ( Tokens + NFT’s ) : Ethereum, Optimism, Cronos, BSC, Gnosis, Fuse, Heco, Polygon, Fantom, zkSync, Polygon zkEVM, Moonbeam, Moonriver, Avalanche, Arbitrum, Celo, and Aurora ??????????? ➖Drains most valuable funds first ?? ( ETH, USDT, BNB, WETH, DAI, APE, FLOKI, SHIBA, ETC) ➖ transfers automatically all valuable opensea assets in one sign ??⛵️ ➖ SEAPORT V1.5 ➖Supports 200+ wallets?? ➖ Telegram Bot Drain Alerts ➖ Token transfer: bypass new MetaMask update ➖Potatoz, captainz, degods and y00ts staked detection ➖ Clean Code no ba...

    $213 (Avg Bid)
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    As an EVM user, I'm interested in a seasoned NodeJS developer with experience in cryptocurrency and blockchain technology. The objective here is to develop a precise, efficient, and bug-free NodeJS script that enables contract interactions on ZKSync, a layer-2 scaling solution for Ethereum. Your tasks will include: 1. Developing NodeJS script. 2. Ensuring script is attuned to ZKSync. 3. Enabling the script to send transactions involving Ethereum andn other ERC20 tokens. 4. NFT purchases. A successful completion of this task would require: - Proficiency in NodeJS - Knowledge of EVM chains - Understanding of web3 transactions - Experience in AMMs / Swap applications Please see the attached brief for more details

    $198 (Avg Bid)
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    I require a revenue sharing membership site for creators. Payouts will be on % of activity/interaction with anti cheat measures in place. Users will upload content (videos, images, text, links) such as social media sites. Creators will have a free public profile and will choose which content is free and which content is for paid members. The site will have a free video roll section with tiktok style short videos that they can scroll through. There will also be a paid members video roll with premium content. Admin will get a %, creators will get a % and referrals will get a % of the total monthly fee revenue generated. referrers can login to member area to get referral links and see stats and update payment information. Payment for the site, creators and referral partners will all by crypto...

    $820 (Avg Bid)
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    I want a manual approval dex where users cannot instantly add their tokens to the dex. Users will need an audit by a selection of preferred auditors from a list. No fee required for listing but we will have to manually approve. Will also need a token developed for the project with taxes and dex token will be default on the home page. Layout will have a chart integrated but users can decide to hide chart. Will be very modern design and responsive. Fees will go to admin. Holders of project token will not pay tx fees. Dex will trade eth and bsc pairs. Users will choose which network and will be able to trade eth pairs with eth network and bsc pairs on bsc.

    $1508 (Avg Bid)
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    Need deflationary token with % of tx gets burned until a certain minimum supply level has been reached. Token will have crypto assets in smart contract that the token will be pegged to for valuation.  IMPORTANT FACTORS: Coin must pass an audit Coin must not have mint function Coin must exempt owner and dev address from fees Must have renounce ownership function Must have no back doors or security issues You MUST deploy upon completion and send all token to me. You as the deployer will have no executive rights or roles in contract. Coin must have holder rewards tax Coin must have tax to admin wallet Coin must have tax to smart contract (pegged) Must have option to write function to exempt other address from fees

    $973 (Avg Bid)
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    I am in need of an experienced React.js developer with knowledge in Node.js and the blockchain technology. Who can provide me a readymade roulette multiplayer game for my website. Although optional, an understanding of Ethereum, Bitcoin or Hyperledger Fabric provides an advantage. While the specific features or functionalities were not provided, experts with skills in user authentication, data encryption and smart contract integration will be valued. Also, despite your preferred platform or technology, a proficient command of Windows, Mac, or Linux will be beneficial. Requirements: • Proficiency in React.js and Node.js • Knowledge in blockchain technology . Knowledge of web 3.0 • Experience in User Authentication, Data Encryption, and Smart Contract Integration would be...

    $113 (Avg Bid)
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    I'm looking for a highly capable CEO and CMO for a 3 to 6-month project in the Web3 space. The ideal candidates will demonstrate excellent communication skills and deep knowledge and experience in the following areas: - Strategic planning and decision-making: You'll guide the strategic direction of our Web3 project, evaluating different pathways and making decisions that set us up for success. - Marketing and brand management: Tasked with crafting a compelling brand story, you'll target appropriate marketing channels and engage our audience effectively. - Business development and partnerships: You'll leverage your expansive network and negotiation skills to build partnerships that add value and foster growth for our Web3 project. If you're an ambitious leader w...

    $462 (Avg Bid)
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    I need a proficient professional to build, and deploy a Solana Anchor program (prefer you use Python Seahorse for the development). The core function of this program is to execute token swaps. Key Deliverables: - Anchor Program capable of token swaps Your experience in understanding of Solana ecosystem and anchor programs will be crucial to this project. Timeframes and Deadlines: - I require this project to be completed within a week's time. Ideal Experience and Skills: - Extensive Anchor Programming knowledge - Familiarity with AMMs and Liquidity Pools - Deep understanding of token swapping mechanisms I am looking for efficiency and accuracy in this project. If you are up to this challenging yet exciting task, I'd be more than happy to consider your proposal. REQUIRED: ...

    $532 (Avg Bid)
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    I'm searching for a capable developer who can create a comprehensive, blockchain-powered Dapp for social networking. Key functions of this Dapp should include: - **User profiles:** The profiles should comprise basic information such as name, age, location, a profile picture, as well as a bio/about section. - **Messaging system:** I need a messaging system that supports private messaging, group messaging, and real-time chat. - **Newsfeed:** There should be a newsfeed, similar to common social networks. Ideal freelancers should have rich experience working with blockchain technology, ideally Ethereum or other similar platforms. A strong track record in the development of DApps would definitely be a bonus. The freelancer should also possess a strong understanding of modern social n...

    $424 (Avg Bid)
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    I need a paper written on block chain topic

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    I'm seeking a technologically savvy professional to develop an Ethereum-based electronic voting system. This project requires design and execution of a system that incorporates key features. - Identity verification: Protect voter's information and ensure only authorized users access the system. - Vote confidentiality: Ensure that the voting process remains secret, preventing third-party interference. - Transparency and auditability: The system should be clear, lending itself to audits and review, yet maintaining voter confidentiality. In terms of user interface, it should be a blend of simplicity and modern aesthetics, accessible to all users regardless of tech proficiency. Ideal applicant would have: - Experience in Ethereum blockchain development - Knowledge of e-votin...

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    We are seeking a highly skilled Freelance Solana Blockchain Consultant and Trainer to join our team on a project basis. The ideal candidate will possess extensive expertise in Solana blockchain development and implementation. Responsibilities: 1. Provide expert consultation on Solana blockchain projects, including architecture design, development, and deployment. 2. Collaborate with the team to identify and implement solutions leveraging Solana's capabilities. 3. Offer guidance and support in troubleshooting and optimizing Solana-based applications. 4. Conduct training sessions to educate team members on Solana blockchain fundamentals, best practices, and advanced techniques. 5. Stay updated with the latest developments and trends in Solana blockchain technology. Requirements: 1. Pr...

    $35 / hr (Avg Bid)
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    Project Introduction: - We are recruiting a full-stack, blockchain developer to join our web3 project Company Introduction: - We operate a virtual asset deposit platform. Project Progress: - Currently developing the MVP, and after its completion, full-service development and management will be required. Overall System Configuration: - Golang, Solidity Project Timeline: - Total project duration: 3 months - Planned start date: ASAP (Start date negotiable until early March) - Interview and contract schedule: Interviews will be conducted upon finding suitable candidates, and contract decisions will be shared within 2-3 days. - Contract process: Project application > Practical interview (no coding test) > Contract decision Number of Positions: - 1 person with 3-4 years of experience...

    $17 / hr (Avg Bid)
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    The function we need: - Wallet Generating & Managing: Develop the function for generating/importing wallets within a Telegram bot, and enable the creation of multiple wallets. - Buy & Sell Tokens: Program the ability to manually (or automatically) buy/sell tokens by entering their smart contract into the Telegram bot. Also, add options like Duplicate Buy, Auto Buy, Max Market Cap, Min/Max Liquidity, Min Market Cap/Liquidity, Max Buy Tax, Max Sell Tax, etc. - Tracking Monitor & Notification: Develop a mechanism to track purchased token metrics, including associated functions like monitoring Anti-Rug, Auto-Sell, Sell x%,... - Advanced Functionalities: Building additional advanced functions to support trading purposes.

    $2374 (Avg Bid)
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    I am looking for an experienced developer to create a bot capable of instantly buying and selling Solana tokens on Raydium, Jupiter DEX. You will need to design a bot that performs operations completely automatically, without any need for manual approval. Key features: Seamless integration with Raydium. Instant execution of buy/sell orders (swap in less than 1 second). Full automation of operations. The ideal candidate should have: Experience in programming trading bots. Excellent knowledge of Solana and its DEX platforms (Serum Dex). High level of accuracy and attention to real-time changes. Further details will be provided upon assignment of the task.

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    Tron Wallet Development 2 days left
    VERIFIED

    looking for Tron app developer more detail we can discuss on chat let me know if u can do it

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    I need a highly competent Tron app developer to, unfortunately, deal with a malicious multisignature permission that's added to my desktop, mobile, and online Tron wallets. Understanding this issue requires: - Proficiency in Tron application development - Deep knowledge of Multisignature Permissions - Ability to navigate desktop, mobile, and online wallets I've already contacted the Tron support team but found no resolution to this issue. I suspect there was unauthorized access to my device leading to this malicious activity. Ideal skills and experiences are: - Proven track record in resolving similar issues - Expertise in Tron Wallet security - Strong technical and analytical skills to identify potential threats and mechanisms of unauthorized device access. Your role is ...

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    I'm looking to transform a distinctive idea into a working cryptocurrency. This cryptocurrency is unique in its aspect of being backed by physical assets, which bridges the gap between the digital and the real world. Key aspects of the project include but are not limited to: - Development of a cryptocurrency supporting instant transactions. - Conceptualizing and integrating the feature of physical assets as a collateral base. - Creating a framework that can be expanded and modified in the future. Although I skipped the question about security measures, I expect the chosen freelancer to provide professional advisement in this matter and build in robust safety features. I encourage applicants who have a stern understanding of blockchain technologies, cryptocurrency development,...

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    I'm looking to develop a cryptocurrency project with a specific focus on transaction tracking. This will primarily include tracking the sender and recipient details. I require a blockchain developer with a sound experience in developing cryptocurrency platforms and can communicate fluently in Arabic. The following skills and experience are needed: - Cryptocurrency and blockchain development - Proficiency in Arabic - Experience in creating robust transaction tracking systems - An understanding of how to implement privacy and security features for transaction details, specifically sender and recipient details. Your responsibility will be the entire blockchain and crypto development, with a strong emphasis on transaction tracking capabilities. Please take note that all communication...

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    Hi I need system for accept payments in cryptocurrencies - BTC | ETH | XMR. For telegram bot. All operations with cryptocurrency via API Also I need a few reports about payments in system. You will find more detailed information in technical task file attached.

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    I'm looking for people familiar with Dextools Trending. I get clients on a daily basis for this job.

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    3 bids

    Seeking Tech Powerhouse to Build the Future! Complement my client magic with your full-stack expertise across web2, web3, apps, and AI chatbots. Leverage your deep software knowledge to craft engaging web2 and mobile app experiences. Let's utilize social media, networking, and major platforms to attract new clients and propel our tech company forward. About Us: We're a passionate tech company with a mission to revolutionize the archive industry. We're building an innovative platform that empowers individuals and medium-sized businesses across the USA to seamlessly manage, access, and protect their critical data. Our unique approach leverages cutting-edge technology and a collaborative spirit to deliver exceptional value to our clients. Together, we can: Develop cutting-e...

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    I'm on the lookout for a specialized React developer who deeply understands blockchain technology, specifically Ethereum. Your knack on real-time event handling will be highly instrumental in driving this project forward. Here's a snapshot of what I'm seeking: - Mastery of React with a focus on real-time event handling - Proven track record in handling blockchain tasks particularly Ethereum-based ones - Django proficiency is a non-negotiable Your familiarity with these technologies, backed by a robust portfolio showcasing similar projects, will place you in a prime position for this opportunity. General experience in backend technologies will be beneficial, but Django expertise is paramount. I look forward to seeing your innovative approach reflected in your bid.

    $20 / hr (Avg Bid)
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    We are a team looking for a backend developer especially of Blockchain to work on a ongoing project, I don't want to add too much in Description, but this is enough for now to move on to inbox, Note: Our front end developer is working on development, now we need backend developer to take on the next step, thank you,

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    Hey, I need a developer to manage blockchain ( Crypto ) projects for my company. Plus point is that if he can manage AI projects as well, It means there's a lot to work on. I want to make it short so let's discuss if you have a strong portfolio. My Company ( I am the founder for ) Let's grow together. Thanks

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    I'm seeking a highly skilled developer to create an AI-powered automated trading and arbitrage bot that operates across all major centralized exchanges (CEXs) and decentralized exchanges (DEXs), with a focus on Binance, Coinbase, and all other CEXs. My goal is to implement this tool with minimal ongoing input from my side, leveraging AI to make informed trading decisions based on market data and trends. Since I do not have specific trading strategies in mind yet, I am open to, and in need of, expert suggestions to maximize profits through effective and efficient trading tactics. **Some Key Requirements (not fully detailled):** - Strong programming skills, particularly in languages such as Python, Java, C#, especially in writing efficient, clean, and maintainable code. - Integration w...

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    I'm looking for a blockchain expert to create a fork DAO for my Defi platform. The platform will run on Binance Smart Chain, Solana, and/or Polygon. Key Functionality: - Yield Farming - Liquidity providing - Staking The DAO should have a user-friendly web application interface that enables seamless interaction. Ideal skills and experience include: - Extensive knowledge in blockchain technology - Proficiency in Defi functions - Experience in Web Application development - Cryptocurrency development on indicated platforms.

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    please only quote if you can really provide this, don't bid randomly. i need Credit Card to Crypto payment gateway. where the customers can pay through credit and i get crypto like BTC, ETH, LTC into my pre provided crypto wallet. I have seen something like on where my customers can buy BTC for me and send to my wallet but my concerns is automated like customers no need to fill manual amount & wallet address. Required. Either prepare script which can be automatically fill on as following below. #1 .Pre defined amount fill automatically #2. pre defined wallet address automatically #3. Select Payment methods VISA automatically #4. Select Payment offers as Simplex automatically #4. Check agree and click Buy button automatically move to next page where customers wil...

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    I am looking for a developer who can run jito bundles on my dedicated node s as soon as possible.

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    Connect Phantom-Wallet Next.js 19 hours left
    VERIFIED

    I'm seeking a skilled developer to integrate Phantom Wallet with my application, specifically for the Solana blockchain. The core functionalities required are transaction signing and token transfer, all through client-side integration. This project will enhance our application's capabilities, allowing users to perform secure transactions directly within our platform. **Requirements:** - Strong proficiency in and JavaScript. - Experience with Phantom Wallet integration. - Deep understanding of Solana blockchain functionalities. - Ability to implement transaction signing and token transfer features. - Knowledge of client-side integration techniques. **Ideal Skills and Experience:** - Previous projects involving cryptocurrency wallets. - Familiarity with Solana's RPC API. -...

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    Project Description: Our project aims to develop an artificial intelligence-powered bot capable of executing spot and futures transactions in the cryptocurrency markets. The primary objective of the bot is to conduct market analysis, identify the best buying and selling opportunities based on real-time data, and automatically capitalize on these opportunities. Additionally, the bot should possess the ability to detect and swiftly execute arbitrage opportunities, reducing the need for manual trading and effectively assisting in portfolio management. Required Skills: - Strong programming skills, particularly in languages such as Python, Java, C#, especially in writing efficient, clean, and maintainable code. - In-depth knowledge of Blockchain Technology, financial markets, cryptocurrenci...

    $508 (Avg Bid)
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    Finance Dapp for Polygon 2 hours left
    VERIFIED

    I am looking for an experienced developer to create a finance decentralized application (dapp) that runs on the Polygon blockchain. The core feature of this dapp will be wallet integration, enabling users to manage their finances seamlessly within the platform. **Ideal Skills and Experience:** - Proficiency in Solidity and smart contract development. - Experience with the Polygon blockchain. - Strong knowledge in dapp structure and decentralized finance (DeFi) mechanisms. - Familiarity with wallet integration techniques and security measures. - Proficient in or for front-end interactions with the blockchain. **Key Features Required:** - Smooth and secure wallet integration for users to interact with their assets. - Intuitive user interface that simplifies financial transactions. - Robu...

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