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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    43 jobs found, pricing in AUD

    I have Project that need to improvement in both frontend and backend. We are going to add wallet to this platform, so the experience with Crypto is plus.

    $54 / hr (Avg Bid)
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    Operator required for which is being operated as as part of the Digitizing Trade network. would feature a platform for provision of web and e-commerce services to companies in Columbus by the operator, as well as the provision of Trade Digitization services to companies in Columbus using tools supplied and supported. is the prime internet brand for Columbus Trade. 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 Internet for companies in Columbus is part of a Network that co-operates with B2B Marketplaces with millions of subscribers... Trade Digitization is like an incoming wave. Organizations that don't embrace it, could be swept away Digitizing Trade in Physical Goods Requires t...

    $69 / hr (Avg Bid)
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    I'm in need of expertise to resolve a recurring error in my current platform built with Flutter. The error message is "insufficient fund from gas * price + +value” and it is incredibly disruptive to the operation of the platform. I've verified I have enough gas balance in my wallet to cover the transaction. My application is utilizing an outdated version of the web3dart Flutter library. It's necessary for the freelancer to have experience working with the older versions of this library. The ideal candidate would have: - Proficient knowledge of Flutter - Extensive experience with the web3dart Flutter library - Proven track record in resolving similar bugs - Comfortable working with outdated system libraries Your task will be to: - Analyze the system and error - ...

    $48 (Avg Bid)
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    I need a Quorum blockchain developer to connect existing nodes with my main node. You should have experience in Genesis block, Geth. This task needs to be done asap. Please only bid on this project if you’re sure.

    $461 (Avg Bid)
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    I am in need of an experienced developer to take on the task of building a cryptocurrency wallet for me. This project will require proficiency in encryption security, payment gateway integration, and sleek, branded design. Key Features: - Support for multiple cryptocurrencies: The wallet must be able to handle transactions not just for one type of crypto, but several. This is a key component of what I am looking for in the final result. - Secure transaction encryption: To ensure user trust, I want the wallet to have well-implemented, robust encryption for all transactions. - VisaNet integration: This is a non-negotiable requirement. The wallet needs to have the ability to accept payments via VisaNet. Design: I am looking for a customizable design with branding options. It should reflect ...

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    About Us: We are an innovative startup dedicated to environmental projects aimed at mitigating CO2 and methane emissions in the atmosphere. Our mission is to create tangible solutions to combat climate change and promote sustainability for future generations. Our Mission: At our core, we are driven by the urgent need to address the environmental challenges facing our planet. By leveraging cutting-edge technology and creative solutions, we strive to reduce greenhouse gas emissions and foster a healthier, more sustainable environment. What We Offer: As part of our commitment to making a positive impact, we are embarking on an ambitious endeavor to develop a cryptocurrency tailored to funding our environmental projects. This cryptocurrency will serve as a groundbreaking fundraising tool, empo...

    $3696 (Avg Bid)
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    I am looking for a skilled developer to create a fully tested and secure website (frontend, backend + admin panel) with no bugs or issues using the MERN Stack. The key features of the front end design include a responsive design, user-friendly navigation, and custom animations. For the backend it would be clean, and fast high quality code with comments and good organisation and readability. The ideal candidate will have experience working with tight deadlines, provide constant high quality updates and be able to deliver quality work within a short timeframe. Tech: Front-end Framework: React.js with + Typescript Styling: Tailwind CSS Back-end Framework: Node.js with Database: MongoDB Goal: Build a cryptocurrency gambling website from PSD + Figma designs and requirements provided and ...

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    I'm venturing into a new enterprise that will greatly benefit from the development of a unique cryptocurrency token. The token will be primarily used for fundraising purposes which will fuel our project's growth and expansion. Key Project Information: • Blockchain Platform: Ethereum – developers who have a robust knowledge of ERC20 or ERC721 token standards should apply. • Primary Function: Fundraising for a project – not a loyalty scheme or transaction token so emphasis is on security and coin value growth potentials. • Business Use: This project has commercial applications, being for the kickstarting of a new enterprise I’m working on, hence, commercial insight would be invaluable for the successful development and launch of our coin. Desire...

    $2182 (Avg Bid)
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    I'm looking for proficient JavaScript game developers who also have an in-depth understanding of blockchain mechanics. The core focus of this project is to breathe new life into existing JavaScript games by integrating specified blockchain functionalities. Key Blockchain Mechanisms: - Smart Contracts - Login with Web3 Wallet - Web3 Wallet Connect Overall Project Goal: About the wallet connect and logic: Overview: We want to integrate Web3 wallet connect functionality into an existing JavaScript game to allow users to log in using their Ethereum wallet addresses. Functional Requirements: 1. User Registration: - Implement a user registration system where users can sign up with their email addresses and create a username/password combination. (Already Implemented) - Store...

    $881 (Avg Bid)
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    Operator required for which is being operated as as part of the Digitizing Trade network. would feature a platform for provision of web and e-commerce services to companies in Nashville by the operator, as well as the provision of Trade Digitization services to companies in Nashville using tools supplied and supported. is the prime internet brand for Nashville Trade. 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 Internet for companies in Nashville is part of a Network that co-operates with B2B Marketplaces with millions of subscribers... Trade Digitization is like an incoming wave. Organizations that don't embrace it, could be swept away Digitizing Trade in Physical Goods Requires...

    $79 / hr (Avg Bid)
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    I want to develop a Broswer where users can win Token as rewards for watching Advertisement on the browser. I will share more details in personal communication

    $923 (Avg Bid)
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    Operator required for which is being operated as as part of the Digitizing Trade network. would feature a platform for provision of web and e-commerce services to companies in Manchester by the operator, as well as the provision of Trade Digitization services to companies in Manchester using tools supplied and supported. is the prime internet brand for Manchester Trade. 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 Internet for companies in Manchester is part of a Network that co-operates with B2B Marketplaces with millions of subscribers... Trade Digitization is like an incoming wave. Organizations that don't embrace it, could be swept away Digitizing Trade in Physical Goods Requ...

    $46 / hr (Avg Bid)
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    I'm in need of a specialist in Solana transactions for an upcoming project. This task requires a specific understanding and capability in bundling transactions in Solana. The main goal is to effectively bundle token transfers in a consistent, secure, and efficient manner. In terms of transaction volume, anticipate handling between 1,000 and 10,000 transactions daily. Ideal Skills For the Task: * Expertise in Solana blockchain technology * Proven experience in bundling transactions, particularly with token transfers * Ability to handle high volume transactions daily * Knowledge in blockchain security measures to protect transactions being bundled * Excellent problem-solving skills, as well as innovative thinking Interested professionals should have a strong record of transaction ha...

    $197 (Avg Bid)
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    I'm seeking an experienced cryptocurrency developer to help develop a stable crypto coin, which is not highly volatile but rather, grows gradually with real value. Key Requirements: - The coin should be based on an existing blockchain platform. - The coin should have a stable value with a slowly increasing growth rate. - It needs to be designed in a manner that allows for liquidation and utilization in real-world projects such as construction, banking, property management, and environmental protection. - An innovative mechanic for sharing profits back with the coin holders will have to be implemented. Required Skills & Experience: - Proven experience in cryptocurrency and blockchain development - Thorough understanding of Blockchain technology and cryptocurrencies - Famil...

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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...

    $10014 (Avg Bid)
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    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.

    $1765 (Avg Bid)
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    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.

    $553 (Avg Bid)
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    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.

    $1041 (Avg Bid)
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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...

    $48 / 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 ...

    $653 (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...

    $54 / hr (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

    $308 (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...

    $1258 (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.

    $2335 (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

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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...

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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...

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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: ...

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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...

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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...

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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...

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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.

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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 1 day 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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    Dextools Trending 10 hours left

    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.

    $31 / hr (Avg Bid)
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