Solidity Jobs & Projects

36 jobs found

We found 36 Solidity jobs that paid in cryptocurrency. Search for work, find a remote job that suits your needs, and apply now!

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Smart Contract Developer Needed (ERC-20 Reflectionary Token)

Posted by Natalia Tucker

Required skills

Hi,
Looking to hire a developer to work on an ERC-20 smart contract. The token is reflectionary and must have no inflation problem like this.
Deliverable timeline within 24 hours. 
https://etherscan.io/token/tokenholderchart/0x1a7981D87E3b6a95c1516EB820E223fE979896b3
Please apply if you are capable to code such contract.

Budget

$200
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Need a developer to code NFT contract

Posted by Zel Os

Required skills

Our company is going to implement a simple NFT mint.
The artwork is ready. The website is available, with only basic web3 integration.
Your job is to create / provide a smart contract and plug it to the front-end. It is on an ethereum layer 2, so the contract will be in solidity.
There is no element of randomness, it's a single picture. There is a finite amount of mint, after which no NFT can be minted again. Also needs to be transferable.

Budget

$300
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NFT Game

Posted by Bluestar Super

Required skills

Hi there
We are looking for a developer to write a smart contract on polygon network for nft game.
To get more detail about the game, consult more detail.
And please introduce your simple bio in your proposal.
This will be salary contract for 2~3 months.
Regards.

Budget

$4,500
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NFT Marketplace MVP

Posted by Terrance Porter

Required skills

We're looking to bring in a Principal Engineer to provide thought leadership for our project. We're a startup looking to release our Marketplace that has a twist to it. We have the front-end development covered but need to have our backend developed. 
We have a configurator we've built and the next step is to build a secondary marketplace around it & on chain. 

Budget

$5,000
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Calling Eth contract withdraw function

Posted by hello

Required skills

Our last dev screwed us. We have some money in a smart contract that we want to receive. I have the admin wallet and the last version of the withdraw function before the last dev deleted the code on github. The contract is unverified on the Eth mainnet. I don't think it will be hard to withdraw but I just want to make sure it's not screwed up. 

Budget

$100
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Smart Contract Consultation and Code Review

Posted by Dragon Baby LLC

Required skills

We're about 4-5 weeks into building a blockchain-based game (about which we can provide more detail).
We need a developer with great blockchain experience who can help us with the following 2 things:
1. Periodic consultation (via chat, call, or email) to answer questions and help us or our devs solve certain problems;
2. Ongoing code review (likely 1-2 times per week) of smart contracts and related code, to ensure accuracy, security, etc.
There's also some potential for doing some collab development with our current devs, but that's not what we're primarily looking for at the moment.
This will likely be a 2-3 month project, since all of the smart contract work will be finalized within that period, and would likely be around 5 hours per week.
We're open to either project-based pricing or hourly pricing, although the latter would be easier.

Budget

$5,000
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Build a DeFi Wallet Tracking Website

Posted by Chris Nolan

Required skills

Hi,
Need a capable web developer to build a DeFi wallet tracking website tracking a specific portfolio wallet's assets across EVM chains with live charts. 
An example will be 
https://mcc.holdings/dashboard
You can use existing APIs such as Debank and Zerion:
https://openapi.debank.com/docs
https://docs.zerion.io
https://www.fohmo.io
I will need from UI/UX to front end and back end, also you must be familiar with building crypto websites and calling necessary APIs.
Site style I like will be these ones, simple and get the necessary data:
https://spartacus.finance
https://www.metaverse.pro
Please let me know if you are available and can get this site done with speed in next 1-3 days. 
If so you can apply to this job, thanks.
 

Budget

$1,000
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Dapp frontend and contracts integration

Posted by Joop Jo

Required skills

We are looking for a freelancer who is able to setup the following in our DApp
- integration of the contracts on the front-end
- Tweak existing the front-end to suit our project 
- review and provide deploy script for existing staking contract
brief-overview is attached for more details or at
https://docs.google.com/document/d/1yJYLRzCpERzi1m90qDI3OuAVRhYBeivZ03wpwV8qlNM/edit?usp=sharing
I'll pay you on polygon
all above on polygon chain

Budget

$100
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Develop a token bridge like TIME Bridge

Posted by Nate Green

Required skills

Hi,
I'm looking to hire a developer to build an ERC-20 token bridge like TIME Bridge, allowing an existing ERC-20 token to be able to bridge across chains while keeping the existing token supply. 
The token needs to be able to bridge between ETH, BSC and FTM.
https://timebridge.org
Will need both front end (minimal & simple) & back end work, please apply if you are familiar with token bridge building. 
 

Budget

$1,000
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Blockchain Developer

Posted by olena

Required skills

Building the future of Decentralized Finance, deep expertise in cryptoeconomics, decentralized finance, and blockchain.
Opportunity to work on some of the most incredible ideas in DeFi and crypto. You will be responsible for guiding multiple startups from 0 to 1.
What you will do:
- Write state-of-the-art smart contracts on Ethereum, Solana, Cosmos, Polkadot, Binance Smart Chain (roughly in that order), or any other chain we work on. Must have the ability to pick up on new smart contract platforms quickly and work with the bridges between chains.
- Ensure that dapps are tested thoroughly via e2e tests
- Contribute to other open-source projects that we integrate with
- Work in close collaboration with several teams on product architecture and design
What you bring:
- Expertise in Solidity, EVM, and smart contract design (or equivalent experience in any other smart contract platform)
- Strong desire to build decentralized and open source software
- Passion for learning new technology and tackling novel technical problems
As Advance :
- React (or another front-end library) development experience. Familiarity with databases and full-stack frameworks.
- General knowledge of DeFi protocols. Have used several DeFi products (Uniswap, Compound, etc.)
Existing contributions to open-source software products

Budget

$50
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GoodDollar Bounties

Posted by GoodDollar

Required skills

GoodDollar is a non profit organization which has launched a blockchain protocol over Etherem and Fuse.io to generate and distribute free crypto universal basic income.
We have multiple bounties both for the development of the wallet (react) and of the protocol (solidity)
Some bounties are defined and has a tag price in GoodDollars.
If the bounty is not defined contact us for scope of work and bounty amount.
https://github.com/GoodDollar/bounties
for help and onboarding https://t.me/gooddollarbounties

Budget

$10,000
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