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!

From 79,610 reviews, clients rate our Blockchain Developers 4.83 out of 5 stars.
Hire Blockchain Developers

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!

From 79,610 reviews, clients rate our Blockchain Developers 4.83 out of 5 stars.
Hire Blockchain Developers

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    15 jobs found

    I need help to recover Bitcoin that went missing after a series of mining-related transfers failed and fees were deducted. The sole objective is to recover lost Bitcoin; no penetration testing or educational demonstrations are required. I will supply full Transaction IDs and all associated details so you can trace what happened on-chain, pinpoint where the funds are currently held, and propose a lawful path to retrieve them. If additional information—such as wallet addresses, mempool screenshots, or further blockchain explorer links—will speed up your investigation, let me know and I will provide it promptly. Please have a proven background in Bitcoin wallet recovery, blockchain forensics, cryptography, or similar disciplines. Familiarity with tools like Bitcoin Core, Electru...

    $594 Average bid
    $594 Avg Bid
    6 bids
    Automating Data Processing
    6 days left
    Verified

    Looking for a Python developer to build a script that connects to an external API, fetches data, processes it, and exports clean reports into Excel. The script should handle errors properly (like failed API calls), and the code should be well-structured so it’s easy to update later. Simple logging for tracking runs would be a plus.

    $210 Average bid
    $210 Avg Bid
    128 bids

    I am looking to develop a fully functional, production-ready non-custodial cryptocurrency wallet mobile application. The app must provide secure and reliable wallet functionality, following industry standards for security and performance, comparable in structure (but not scope) to Trust. Core Features: Wallet creation (secure generation of seed phrase / mnemonic) Wallet import (restore using seed phrase) Display wallet address and QR code Display on-chain balance (Ethereum network initially) Send and receive transactions Transaction history Technical Requirements: Must use for wallet generation, signing, and transaction handling Use Infura or Alchemy for blockchain RPC connectivity Non-custodial architecture (private keys generated and stored locally on device only) Secure storage imp...

    $420 Average bid
    $420 Avg Bid
    28 bids

    I'm looking for an experienced blockchain developer to create a meme coin on the Ethereum platform. The primary goal of this coin is community building. Key features: - Staking capabilities - Governance voting - Token burns Ideal skills and experience: - Strong knowledge of Ethereum and smart contract development - Experience in creating tokens with staking and governance features - Familiarity with tokenomics and implementing token burn mechanisms Please provide examples of similar projects you have completed.

    $29 / hr Average bid
    NDA
    $29 / hr Avg Bid
    14 bids

    I'm looking for a skilled developer to create a USDT wallet management software. The software should be compatible with Windows and Linux platforms. Essential features include: - Secure multi-signature support - Comprehensive transaction history - User-friendly address book Ideal skills and experience: - Expertise in cryptocurrency wallet development - Proficiency in cross-platform software development - Strong security protocols and encryption knowledge Please provide examples of previous similar work.

    $410 Average bid
    $410 Avg Bid
    14 bids

    I want a bootable .img image for the Raspberry Pi 4 that turns the board into a fully offline, hardware-style wallet. After flashing the image to an SD card and powering up, I expect a clean graphical interface that lets me: • Generate and manage addresses for roughly forty of the most-used coins and tokens. • Sign and later broadcast transactions only when I briefly connect the Pi to a network. • Move funds straight to a linked bank account by entering a routing and account number—ACH style—without ever needing a third-party exchange. The build has to run reliably with no internet dependency at first boot, keeping all keys on the device and encrypted at rest. A simple on-screen flow for first-time setup, balance overview, and transfers is essential; I shou...

    $382 Average bid
    $382 Avg Bid
    22 bids

    I need a single .img file that I can flash straight to a micro-SD, slot into a Raspberry Pi 4, power on, and start mining—no extra setup, no internet connection, just plug-and-play. The image must boot directly into an advanced graphical interface that lets me monitor hashrate, temperature, accepted shares, pool status, and switch coins without touching the command line. A high speed plug & play offline crypto miner for all 40 crypto currencies. The core requirement is support for the three main algorithms I selected—SHA-256, Ethash, and Cryptonight—so the device can tackle my full portfolio of roughly forty coins. Performance matters: the system should auto-detect optimal overclock settings for the Pi 4, make efficient use of its GPUs/CPUs, and offer pool configura...

    $301 Average bid
    $301 Avg Bid
    21 bids

    We are building a platform focused on gaming, prediction systems, and decentralized infrastructure. We are looking for an experienced developer who can take a leading role in system architecture and core development. Scope of work: - Design and develop backend systems - Build and integrate smart contracts - Contribute to overall system architecture - Ensure scalability, security, and performance Requirements: - Strong experience in backend or fullstack development - Experience with Web3 / blockchain technologies - Experience with smart contract development (e.g. Solidity) - Familiarity with distributed systems - Ability to work independently and take ownership - World wide location developers(except India, Pakistan, Bangladesh, Africa: will skip developers on these locations) Nice to h...

    $48 / hr Average bid
    $48 / hr Avg Bid
    62 bids

    Solana Copy Trading Platform Development I want to create a web platform similar to Mirrorlink, focusing on a clean, modern copy trading dashboard using Solana. The main goal is to enable users to connect their Solana wallet to automatically copy trades from selected leader wallets, Telegram channels or successful traders. Scope of work - Develop frontend with a dark modern theme featuring neon accents and clean cards. - Integrate a Connect Wallet button for platforms like Phantom, Solflare, Backpack. - Create a leaderboard/discover page listing top traders/wallets with stats such as PNL, win rate, number of copiers, AUM. - Design trader profiles with performance charts and trade history. - Implement a copy settings modal with options for amount to allocate (fixed SOL or %), slippage tol...

    $25 / hr Average bid
    $25 / hr Avg Bid
    45 bids

    I'm in the early stages of developing a memecoin project and need help with concept development and securing funding. Key tasks include: - Developing a unique and engaging memecoin concept - Designing a sustainable and attractive tokenomics model - Securing funding through non-equity means (investors, crowdfunding, grants) Ideal skills and experience: - Strong background in cryptocurrency and blockchain - Experience in tokenomics and smart contract development - Proven track record in securing funding for crypto projects - Creative thinker with a passion for memecoins I need someone who can help me shape my idea and connect me with the necessary funds to bring it to life.

    $1867 Average bid
    $1867 Avg Bid
    15 bids

    I’m expanding our engineering team at LaRevela, the Web3 identity and visitor-intelligence platform for eCommerce, and I need a skilled technical recruiter who is already on the ground in China. Your mission is to identify and secure a mid-level Full-Stack Blockchain Developer who excels at full-stack development and seamless Web3 integration. What the ideal hire must bring: solid, hands-on JavaScript, Python, and Solidity experience, plus a track record of shipping blockchain-enabled products that actually reach users. You’ll handle the entire funnel—sourcing across local and remote talent pools, screening for technical depth, coordinating interviews, and guiding compensation conversations in line with our global structure. Deliverables I expect from you: • A ve...

    $643 Average bid
    $643 Avg Bid
    30 bids

    I'm seeking an experienced professional to verify both the identity and location of a person using the following documents: email address, Lovense ID, and bitcoin wallet. Ideal Skills and Experience: - Background in verification services - Familiarity with cryptocurrency and digital identities - Strong attention to detail and accuracy - Prior experience in handling sensitive information securely Please include relevant experience in your application.

    $1267 Average bid
    $1267 Avg Bid
    8 bids

    Academic Research Report & Presentation Project Overview I am looking for a skilled freelancer to complete an academic project for (Management Information Systems). The project requires in-depth research on a selected technology topic, a formal written report (10–15 pages), and a PowerPoint presentation to be delivered on the submission date. Topic The freelancer will research and write about one of the following topics IN Saudi Arabia (to be agreed upon): • Data Mining & Big Data • E-Government • E-Business & E-Commerce • Intranet & Extranet • Collaboration & Social Business • Blockchain Technologies (Cryptocurrencies, Distributed Ledgers, etc.) • Cybersecurity • Mobile and Cloud Computing • Fintech (Proptech, Insur...

    $186 Average bid
    $186 Avg Bid
    53 bids

    looking for a smart contract developer who really knows their stuff and has at least 3 years of hands-on experience working with blockchain projects. You'll be helping build and deploy smart contracts, making sure everything is secure, efficient, and works smoothly. Ideally, you're comfortable working with Solidity and have experience with tools like Hardhat or Truffle, along with Web3 libraries. It's important that you understand how blockchain systems work and can spot potential security issues before they become problems. I'm looking for someone who's reliable, communicates well, and can take ownership of their work. If you've worked on DeFi, NFTs, or similar projects before, that's a big plus, feel free to share anything you've built. If this ...

    $462 Average bid
    $462 Avg Bid
    7 bids
    Criação Token TRC-20 TRON
    13 hours left
    Verified

    Quero lançar um token próprio, padrão TRC-20, na rede TRON. O ativo deverá se chamar “Moeda” e usar o símbolo “usdt”. Preciso do contrato inteligente completo, escrito em Solidity para a máquina virtual da TRON, já configurado para: • Transferências, aprovações e consulta de saldo dentro das normas TRC-20 • Compatibilidade imediata com TronLink, TRONSCAN e qualquer carteira que suporte tokens TRON • Verificação de código no TRONSCAN, exibindo nome, símbolo, supply e decimals corretamente Entrego o nome, símbolo e supply inicial; espero de você: 1. Código-fonte claro, comentado e sem dependências obscuras 2. Compila&cced...

    $1059 Average bid
    $1059 Avg Bid
    9 bids

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