Mis búsquedas recientes
Filtrar por:
    Estado del trabajo
    47 trabajados encontrados, precios en EUR

    Nos encontramos en el proceso de desarrollo de un contrato inteligente que genera NFT para un juego. Estamos bloqueados en un punto y requerimos asesoría y participación en desarrollo, en caso de ser necesario. Tendríamos que valorarlo inicialmente. Específicamente: 1. Hay un proceso que denominamos Ciclaje: en el struct {refref_pay: []} debemos crear array que nos permita registrar las referencias de pago, al hacer la 4 referencia de pago hacer el ciclaje y dejar vaciado el array 2. Transcaccion: para generar los nft se deben descontar de nuestro token 3. Comprar: transferir los fondos (YAZ) al Smart contrat generador de los NFT y enviar a otra WALLET variable USER¯

    €194 (Avg Bid)
    €194 Oferta promedio
    9 ofertas

    Busco desarrollador SOLIDITY (erc-721) para que asesore el desarrollo de un smart-contract de un proyecto NFT. Requerimos asesoria para la creación de un proceso en el struct para crear un array que nos permita registrar las referencias de pago, que tiene insidencia en transacciones y transferencia de fondos de la compra.

    €169 (Avg Bid)
    €169 Oferta promedio
    15 ofertas
    Solana Expert Needed -- 2 6 días left

    Good Solana expert needed. Details will be shared in DM.

    €237 - €710
    Sellado Acuerdo de Confidencialidad
    €237 - €710
    12 ofertas
    Solidity Development + React Web3 6 días left

    I need a solidity developer + React Web3 to develop the front-end component and smart contracts for the next feature release of my NFT project. If you meet those skill requirement, I would like to share with you some documentation to start the work as soon as possible :) The budget for the entire work is 1K$ with 1 Months deadline!

    €213 - €947
    €213 - €947
    30 ofertas
    NFT mint smart contract 6 días left

    Hello, Thanks a lot for applying. As a first round, you are tasked to complete a short technical find below the steps to follow: 1) Create an ERC721 contract, which can allow users to mint 1 NFT at a given time, provided they pay a minimum price of 0.01 in ETH. 2) Create a second ERC721 contract, which can allow users to mint an NFT, provided then transfer the NFT from the first contract above to the second contract (which escrows the token). 3) At a later stage, the user can swap back the second NFT back for the first that price is zero for the swap functionality. 4) Finally, deploy all contracts following best practices of Solidity, keeping upgradability and reusability in mind. Please send a public GitHub link, and a deployed contract link on any Testnet of your choice. Good Luc...

    €68 (Avg Bid)
    €68 Oferta promedio
    12 ofertas

    I want to create a smart contract with some functions like other contract. If you know how to create contract, dm me, and let discuss for more.

    €520 (Avg Bid)
    €520 Oferta promedio
    49 ofertas

    I need help converting my ERC20 token that worths 300usd to ETH, but I can't find liquidity in any DEX, so what can I do? I pay for this job the half, 150usd, and I need to understand the process. I find a way, because a customer of mine wants to change all their ERC20 token to FIAT currency. Thanks.

    €239 (Avg Bid)
    €239 Oferta promedio
    26 ofertas
    NFT Blockchain COIN project 5 días left

    Project Requirements 1. Client has an Apartment buildings and wants to give 1 NFT for 1 house in an apartment to a customer. 2. Launch Coin("KuKu NFT HOMES COIN") pegged to Stable coin(USDT) and using this coin customer will buy the NFT(Apartment house). 3. Create a marketplace where people will BUY/SELL NFTs using "KuKu NFT HOMES COIN"

    €4733 - €9466
    Sellado Acuerdo de Confidencialidad
    €4733 - €9466
    8 ofertas

    Hi Freelancers We are building a DEX platform similar to Pancakeswap or Uniswap and looking for a long term relationship. We are gonna fork Pancakeswap and you will prove your skills during a small test. The test is just to fork this project and run it locally by removing vercel dependency. Please apply for this job after checking the project carefully Place just "Pancakeswap api fork".

    €737 / hr (Avg Bid)
    €737 / hr Oferta promedio
    35 ofertas
    REACT developer needed - long term 5 días left

    Please take your time and answer to following questions 1. can you develop an app for IOS ? 2. can you develop an app on android 3. can you list on app store the app for IOS and Android ? 4. can you take a template and remodel it? change location of boxes, charts, etc... 5. how long it will take you to change design of page1 to look like page2 (see attached) Only the content section with contacts info. 6. How many hours can you dedicate per week 7. How many hours can you dedicate per day? 8. did you ever develop on solidity ? if yes please describe 9. can you get on a call every Wednesday and Friday for 30 minutes ? 10. can you install a react js template on a dedicated server WHM /CPANEL on a subdomain Submit answers in your proposal please… if in proposal you don’t subm...

    €16 / hr (Avg Bid)
    €16 / hr Oferta promedio
    100 ofertas

    Hello. I am looking for senior solidity developer. You have experience with token development. This will be long term job if you are good developer. Best regards.

    €515 (Avg Bid)
    €515 Oferta promedio
    28 ofertas

    List of tasks: 1. Add Excoincial Blockchain to 2. Do some aesthetic frontend and backend work on such as logo change, colour change, content change. Here is a reference site: and you will do exactly what ZYX Scan has on such as display of graph using API, adding validators, multisender, connecting our bridge to explorer, connecting swap, adding testnet, etc. For the above task I think you have seen ? So should be updated to function like that. - Add logo - Add favicon - Make a few colour changes - Add meta data to the injector so we can manage it easily. - Make EXL price automated - Add price/market chart - Add smart contract verification - Add testnet - Add our social media links. - Optimise speed of the explorer. So basically upgrade to the level of 3. Pro...

    €1405 (Avg Bid)
    €1405 Oferta promedio
    36 ofertas

    Create the whole world to generate a new Blockchain-based cryptocurrency. Proof-of-stake model, also create the pool and nodes model. Initial product will be based on binance.

    €1723 (Avg Bid)
    €1723 Oferta promedio
    66 ofertas


    €102 (Avg Bid)
    €102 Oferta promedio
    5 ofertas
    Create a deposit smart contract 5 días left

    We are looking for someone to be able to do this Task here below: Task -> As ethereum is moving to proof of stake consensus mechanism. we would like you to create a deposit smart contract, where people can deposit X amount (configurable) of Ether. Along with that find a optimal way to create json object necessary for making a deposit into smart contract. json object should contain following fields. (it should follow the eth2.0 spec standard) [ { "pubkey": "", "withdrawal_credentials": "", "amount": 32000000000, "signature": "", "deposit_message_root": "", "deposit_data_root": "", "fork_version": "70000069", "network_name": "kiln", "...

    €186 (Avg Bid)
    €186 Oferta promedio
    25 ofertas
    Criar Website de ICO 4 días left

    O Website será para vender minha Própria Criptomoeda . Rede BscScan. Deve fazer a conversão automática dos pares que eu aceito. Pares aceitos são BTC / BUSD / ETH

    €215 (Avg Bid)
    €215 Oferta promedio
    10 ofertas

    Greeting for everyone! I have NFT marketplace project for pre-lanch. project has done all and left some issues in Smart Contract. I am looking for someone who can fix this issue. you must have rich experience in Solidity/Smart Contract development. Conditions: 1. you have to work through remote access because project is private. 2. all funds will be release after deploying contracts successfully. I have similar projects more and this will be long term deal. cheers!

    €1411 (Avg Bid)
    €1411 Oferta promedio
    67 ofertas

    Looking for Nft Developer. You will need to work on following points to make our development advanced and unique. Currently I have just GIF(animation available) . - Upload art to IPFS - NFT Minting dApp (minting site with verification, wallet integration and contract integration) - Gas Optimized NFT Upgradable Smart Contract Development Deployment ERC721A . - Contract should have whitelisting, presale, and a giveaway - NFT listed on NFT Marketplaces - Opensea, IMX etc. - Custom Dynamic Admin Panel

    €33 - €95
    €33 - €95
    13 ofertas

    A full trade application on the blockchain network.

    €3080 (Avg Bid)
    €3080 Oferta promedio
    30 ofertas

    Hello everyone, I need: - Token smart contract with fee extraction on BSC + bridges to ERC and Polygon - Staking contract - Token locker - Voting system - Dapp frontend

    €603 (Avg Bid)
    €603 Oferta promedio
    23 ofertas
    Cryptocurrency Wallet 3 días left

    We are building a cryptocurrency wallet using Dart Flutter that enables users receive Bitcoin,ETH and BNB.

    €145 (Avg Bid)
    €145 Oferta promedio
    17 ofertas api expert and python 3 días left

    MY QUESTION IS: Do you have experience in setting the price of an item in a collection via the API? I have python code that creates the NFT's and displays them on opensea - I would just like to use the API to set the initial price - see attached screen shot for clarification

    €20 / hr (Avg Bid)
    €20 / hr Oferta promedio
    33 ofertas

    looking for developer who has already got good experience in software development on solana. Please contact only if you have existing experience. before starting discussion you need to provide some details on what RELEVANT work you have done - only then you will be CONSIDERED.

    €276 (Avg Bid)
    €276 Oferta promedio
    5 ofertas

    Start immediately! Need an experienced dev, who can fix, eg see why a Solidity Airdrop Code is not working on the Binance Smart Chain. The best candidate will be awarded 50$, this should be an easy 2 hours job if you know your stuff, people who ask for unrealistic high prices after bidding will be reported to freelancer, so bid accurately

    €80 (Avg Bid)
    €80 Oferta promedio
    13 ofertas

    I need auditor who work with our lots of projects

    €521 (Avg Bid)
    €521 Oferta promedio
    8 ofertas

    Hi I'm looking for someone to collaborate with for my blockchain project. I would need olympus dao bonding mechanism hybrid with pancakeswap staking pools (syrup pool). Send message for more info.

    €1268 (Avg Bid)
    €1268 Oferta promedio
    21 ofertas

    Hi. I need a blockhain dev that can create a stop loss smart contract for lp yield farming. The bot / smart contract has to monitor the value of the lp (like yieldwatch or apeboard) every minute (as often as possible) and liquidate positions depending on the % loss factor of the position. Turn lp back to stables. On every blockhain like yieldshield Thanks

    €540 (Avg Bid)
    €540 Oferta promedio
    37 ofertas
    Blockchain - Website 2 días left

    Need a good developer for website.

    €48095 (Avg Bid)
    €48095 Oferta promedio
    33 ofertas
    Blockchain engineer 2 días left

    Hello We are looking for an individual Blockchain developer. Please don't bid if you don't have portfolios. Required skills and experience - Solidity, , React, Node, CSS, HTML, JavaScript - Database architecture - Token development, Smart contract development, NFT marketplace or mint site development, DeFi Dapp - Teamwork - Clear communication (Zoom call) - Attention to detail Bonus skills and experience - Python, Rust, C#, Vue, Angluar, PHP - Design - NFT game development(3D framework) We hope you send us your past projects if you are a senior developer. If you don't have you can save your proposal. And we will read all proposals from the start to the end carefully. So you can write as well as you can without hurrying. Plus, we have our development team and will check...

    €39 / hr (Avg Bid)
    €39 / hr Oferta promedio
    64 ofertas
    Blockchain project ($1000) 2 días left

    Need a reliable developer for this project.

    €895 (Avg Bid)
    €895 Oferta promedio
    59 ofertas

    High level description: We have: 10,000 NFTs with metdata We need (high level): -Someone with experience of launching an NFT on ETH and Opensea, and a good understanding of Web 3.0 and Smart Contract Development. You will have to guide me on some aspects too, on the best way to mint etc. -A NFT Wesbite -A login for NFT holders (maybe metamask) Functions for NFT Holders: - Accept an Agreement after login and enter their name and address (only need to do this once, unless the NFT holder changes), date timestamp must also be stored for acceptance of agreement. - Ability to Submit a Proposal - Ability vote on proprosal - Ability to view table/rankings for proposals - Admin should be able to view and accept proposals amongst other functions Good english speaker required and you will need to ...

    €1511 (Avg Bid)
    €1511 Oferta promedio
    44 ofertas
    Urgent blockchain website 2 días left

    Need an individual who is competent.

    €728 (Avg Bid)
    €728 Oferta promedio
    53 ofertas
    Build a blockchain website ASAP 2 días left

    Need a competent individual for this project.

    €767 (Avg Bid)
    €767 Oferta promedio
    58 ofertas
    Need someone Solidity developer 2 días left

    I am looking for expert Solidity with over 2 years of professional experience.

    €1261 (Avg Bid)
    €1261 Oferta promedio
    40 ofertas

    We are looking for a Senior Smart-Contract Engineer to take ownership over the development of the most innovative DeFi yield aggregator. The ideal candidate will have solid smart contract proficiency, strong technical leadership, a keen understanding of financial concepts, and a consistent track record of solving critical engineering problems.

    €779 (Avg Bid)
    €779 Oferta promedio
    50 ofertas
    Cronos blockchain expert -- 2 2 días left

    looking for a experienced cronos blockchain developer who can also build dapp and wallet integration (metamask and defiwallet) I want to launch NFT project on Cronos chain asap please share your past works and github profile

    €35 / hr (Avg Bid)
    €35 / hr Oferta promedio
    55 ofertas
    Ico smart contract 2 días left

    I need an Ico contract that works as escrow for holding and distributing tokens to the proper said people. Must be fore multiple escrows at a time handling different projects,

    €28 - €237
    €28 - €237
    33 ofertas

    Need a competent individual to make this.

    €685 (Avg Bid)
    €685 Oferta promedio
    64 ofertas
    NFT factory. Spanish dev needed 1 día left

    We need a Spanish dev experienced in Solidity. Only Spanish devs, preferably from Barcelona.

    €2332 (Avg Bid)
    €2332 Oferta promedio
    31 ofertas

    create staking smart contract for bep20 token staking Rewards 6 Months 5% 9 Months 10% 12 Months 20% 1- UI/UX for staking 2- Web 3 connectivity 3- Testing on testnet and mainnet deployment 4- Deployment on aws of all above work

    €592 (Avg Bid)
    €592 Oferta promedio
    16 ofertas

    NFT social media like marketplace

    €643 / hr (Avg Bid)
    €643 / hr Oferta promedio
    28 ofertas

    I have a website and Solidity Contract ready and I want someone to integrate them using or

    €42 (Avg Bid)
    €42 Oferta promedio
    4 ofertas
    Blockchain Solidity Developer 1 día left

    Hi I need Blockchain Solidity developer who can help me create a smart contract for NFT project similar to: If you can connect it to front end of our web site it'll be huge so React/Javascript knowledge is a plus.

    €323 (Avg Bid)
    €323 Oferta promedio
    53 ofertas

    Smart contract Developer - Solidity, Solana, Rust, Ethereum - Crypto Wallet integration - NFT

    €13 / hr (Avg Bid)
    €13 / hr Oferta promedio
    14 ofertas

    Hi devs. My previous developer has an personal issue so I am going to hire other dev who can handle his stuff as a blockchain developer. The details will be provided to the candidate. I need a long term developer. I have too much stuff for my business. Please submit a proposal on this job post seriously!. scammer not accepted!

    €1499 (Avg Bid)
    €1499 Oferta promedio
    60 ofertas
    Fix some bugs 11 horas left

    Hi, freelancers I have smart contract. That has some bugs. I find someone to fix it. Requirements - solidity - hardhat If you are right person, I will give you some works.

    €27 / hr (Avg Bid)
    €27 / hr Oferta promedio
    10 ofertas

    Por favor, regístrate o inicia sesión para ver los detalles.

    Sellado Acuerdo de Confidencialidad