Julian Cislo, Developer in Oshawa, Canada
Julian is available for hire
Hire Julian

Julian Cislo

Verified Expert  in Engineering

Blockchain Developer

Location
Oshawa, Canada
Toptal Member Since
October 6, 2022

Julian is a full-stack Web 3.0 developer and consultant. 他专注于可靠智能合约的设计、开发和安全考虑. He has founded QuantDeFi, 这是一家在区块链领域提供解决所有Web 3问题的咨询公司.为希望集成区块链解决方案的客户提供零相关问题. Julian还擅长交易自动化, 利用闪贷技术构建套利和清算机器人.

CryptocurrencyFull-stackSecurityWindowsBlockchainPythonGanacheSolidityEthereumMetaMaskProject ManagementGitNPMNode.jsOracle

Portfolio

QuantDEFI consulting
JavaScript, TypeScript, Bots，复杂问题解决，Solidity，松露...
UE Games
区块链，智能合约，Solidity，以太坊，JavaScript，加密货币...
Freelance Client
JavaScript, Node.js, Python, Cryptocurrency, Blockchain, Binance API...

Experience

Blockchain - 7 yearsERC-721 - 5 yearsERC-20 - 5 yearsERC-1155 - 5 yearsSolidity - 5 yearsSmart Contracts - 4 yearsFull-stack Development - 3 yearsWeb3.js - 3 years

Availability

Part-time

Preferred Environment

Windows, Ubuntu, MacOS, TypeScript, Solidity, Truffle, Hardhat, NPM, JavaScript, Non-fungible Tokens (NFT), Blockchain, MetaMask

The most amazing...

...我建立的协议是一个P2P NFT借贷服务，具有可交易的NFT衍生品.

Work Experience

CEO

2021 - PRESENT
QuantDEFI consulting
  • 为各种项目开发全栈区块链应用程序.
  • 为区块链交易自动化创建bot系统, including trading bots, arbitrage, and liquidations.
  • Audited smart contract code for various clients, 寻找常见和不常见的潜在安全漏洞和气体优化.
Technologies: JavaScript, TypeScript, Bots，复杂问题解决，Solidity，松露, Hardhat, Non-fungible Tokens (NFT), Blockchain, Smart Contracts, MetaMask, Full-stack Development, Management, Uniswap, Lending, Windows, Arbitrage, Blockchain & Cryptocurrency, Python, Full-stack, Tokenomics, ERC-721, ERC-1155, ERC-20, Project Management, Oracle, Foundry, Git, APIs, Utility Tokens, Web3, Token Design, Ganache, Ganache CLI, Writing & Editing

Web3.js Engineer

2020 - PRESENT
UE Games
  • 开发和部署NFT解决方案，并将其分发给数百名玩家.
  • 为各种可替换的令牌设计并实现了令牌学系统.
  • Consulted and advised about several scaling options, including Polygon and ImmutableX, to improve transaction speeds and costs.
Technologies: 区块链，智能合约，Solidity，以太坊，JavaScript，加密货币, Software Architecture, Bots, Decentralized Finance (DeFi), Crypto, Node.js, Security, Solana, Non-fungible Tokens (NFT), MetaMask, Full-stack Development, HTML, CSS, Windows, Blockchain & Cryptocurrency, Full-stack, Tokenomics, ERC-721, ERC-20, TypeScript, Project Management, SQL, Oracle, Foundry, Git, APIs, Utility Tokens, Web3, Token Design, Ganache, Ganache CLI, Writing & Editing

Trading Bot Developer

2022 - 2022
Freelance Client
  • 开发链上交易业务逻辑，并将其实现到Node中.js back end paired with a MySQL database.
  • 为实时数据馈送和直接连接到前端创建API和WebSocket端点.
  • 将系统扩展为商业用途，使多个用户同时访问.
  • 利用各种分散的金融流动性池协议，如Uniswap.
Technologies: JavaScript, Node.js, Python, Cryptocurrency, Blockchain, Binance API, Full-stack, ERC-20, SQL, Git, APIs, Utility Tokens, Web3, Token Design, Ganache, Ganache CLI

Senior Full-stack Developer

2021 - 2022
PAWNSPACE
  • 创建了点对点NFT抵押协议.
  • 集成了先进的Solidity概念，包括在线组装和可升级的合同.
  • 管理一个小型开发团队，创建促销nft和挖矿UI.
Technologies: Full-stack Development, Solidity, JavaScript, Truffle, Creative Problem Solving, Management, Web Marketing, Twitter, Blockchain, Smart Contracts, Cryptocurrency, Software Architecture, Trading, Decentralized Finance (DeFi), Crypto, Node.. js，安全性，不可替代令牌(NFT)，元掩码，HTML, CSS, Windows，区块链 & Cryptocurrency, Full-stack, ERC-721, ERC-20, Project Management, SQL, Oracle, Git, APIs, Utility Tokens, Web3, Token Design, Ganache, Ganache CLI

Smart Contract Engineer

2020 - 2021
Freelance Client
  • 开发了一个由流动性池代币支持的实验性稳定币，包括uniswap和balancer.
  • 利用Chainlink Oracle feed对流动性代币进行估值，并确定稳定币的发行.
  • 预期在不需要清算机制的情况下实现稳定.
  • 面临着在极度背离的情况下保持联系汇率制的挑战.
Technologies: Blockchain, JavaScript, Solidity, Truffle, Hardhat, Uniswap, Smart Contracts, Ethereum Smart Contracts, Ethereum, MetaMask, Full-stack Development, Management, Lending, Windows, Blockchain & Cryptocurrency, Python, Full-stack, Tokenomics, ERC-1155, ERC-20, Project Management, Oracle, Foundry, Git, APIs, Utility Tokens, Web3, Token Design, Ganache, Ganache CLI, Writing & Editing

Lotto Balls

Lotto Balls是一款智能合约老虎机和彩票游戏，利用Chainlink VRF在我设计的地方提供安全随机数, developed, tested, 前端使用React，后端使用Solidity智能合约.

游戏的目标是从1到8中选择8个数字，然后尝试将它们与随机生成的数字组合相匹配. The more digits match, the greater the prize. 该协议还包含一个本地可替代的令牌，该令牌作为奖品铸造，并支持另一种玩游戏的方式. 游戏在Polygon上运行，需要MetaMask指向Polygon网络来访问应用程序.

套利，清算和其他杂项交易自动化工具

As a hobby, 我喜欢开发各种机器人来执行链上套利, liquidations, 和其他潜在的有利可图的任务，我的首选开发工具集是Node.js for monitoring scripts, Web3.js用于连接到区块链，而Truffle和Solidity用于满足所有智能合约需求.

Some bots, 例如单协议套利或nft游戏自动化, 是否简单，因为它们只需要监视脚本和与现有协议的直接交互. In other cases, like multi-protocol arbitrage and liquidations, 我已经编写了自定义智能合约，将多个链上操作合并到单个交易中. 常见的设计模式包括使用flash借用或类似flash的设计将各种函数调用集成到单个原子操作中. For most automation tasks, fast and reliable access to a node is necessary; therefore, 我选择在本地运行区块链节点，以绕过公共RPC速率限制.

I have experience operating nodes on Ethereum, Avalanche, Harmony, Polygon, Optimism, Binance Smart Chain, and Fantom.

Rentable

http://github.com/Rentable-EthToronto/rentable-contracts
Rentable是一个NFT租赁平台，用户可以将他们的NFT出租给借款人，并收取费用. To rent an available NFT, 借款人必须先缴付担保物，并向业主缴付费用，才可获得免贷款. 如果代币没有按时返回，则抵押品将返回给NFT所有者. 这个项目是在ETHToronto黑客马拉松上开发的，并在24小时内建成.

Caesar's Temple

Caesar's Temple is a Web 3.0 game universe based on Greek and Roman mythology. It features role-playing elements, including combat, resource gathering, and crafting, among other things. 这个游戏完全是由智能合约构建的，并利用VRF在分散的系统中带来安全的随机化. 它还具有我独特的实验代币组系统，并将遵循模块化发布时间表.

Languages

TypeScript, Solidity, JavaScript, Python, HTML, CSS, SQL, Python 3, Java, c++

Frameworks

Truffle

Libraries/APIs

Web3.js, React, Node.js, Binance API

Tools

NPM, MetaMask, Git, Ganache, Ganache CLI

Platforms

Windows，区块链，以太坊，Oracle, Ubuntu, MacOS, Hyperledger, Twitter

Industry Expertise

Project Management

Other

Complex Problem Solving, Creative Problem Solving, Ethereum Smart Contracts, Smart Contracts, Cryptocurrency, Bots, Decentralized Finance (DeFi), Crypto, Lending, Security, Non-fungible Tokens (NFT), Uniswap, Arbitrage, Blockchain & Cryptocurrency, Full-stack, Tokenomics, ERC-721, ERC-1155, ERC-20, APIs, Utility Tokens, Polygon, Web3, Token Design, Hardhat, Full-stack Development, Software Architecture, Trading, Solana, Foundry, Writing & Editing, Web Marketing, User Experience (UX), Physics, Mathematics, Computer Science, Education, Training

Paradigms

Management

2010 - 2015

Bachelor of Science in Physics

University of Guelph - Guelph, Ontario, Canada

JUNE 2020 - PRESENT

Blockchain Development

George Brown College

Collaboration That Works

How to Work with Toptal

在数小时内，而不是数周或数月，我们的网络将为您直接匹配全球行业专家.

1

Share your needs

在与Toptal领域专家的电话中讨论您的需求并细化您的范围.
2

Choose your talent

在24小时内获得专业匹配人才的简短列表，以进行审查，面试和选择.
3

Start your risk-free talent trial

与你选择的人才一起工作，试用最多两周. Pay only if you decide to hire them.

Top talent is in high demand.

Start hiring