Hattie John - Full Stack Blockchain Developer

Hattie John

4.8

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Hattie John

4.8

Gender

Male

Address

Metro Manila, Philippines

Language

English - Advanced

Main expertise

Blockchain Full-stack React.js Web3.js DeFi JavaScript Front-end Back-end Next.js Ethereum Ethereum Smart Contract Web

Introduction

Hattie John is an innovative Full Stack Blockchain Developer with 7 years of experience in decentralized applications (DApps), DeFi, NFTs, smart contracts, and Web3 integration. She is skilled in frontend development with React and Next.js and proficient in integrating backend technologies. A strong advocate of Agile methodologies, she is experienced in version control using GitHub. Hattie is passionate about leveraging blockchain technology to drive business success and create impactful digital solutions.

Project list

AI and Blockchain Development Projects - Australia

2023 - 2024

Developed AI SaaS applications like Revocalize.ai, a Voice Conversion App, and Selfrepresent.ai, an AI Legal Chatbot App using Next.js and Supabase, implementing Supabase Auth.

Built AI SaaS applications, including Voice Conversion App (Revocalize.ai) and Selfrepresent.ai (AI Legal Chatbot App), using Next.js and Supabase, implementing Supabase Auth. Developed an innovative Non-KYC crypto exchange system, including a web application and Telegram bot, reaching over $100K in trading volume. Deployed multiple smart contracts and utility tokens, amassing over 10K holders. Introduced a Fair Token Offering (FTO) mechanism, replacing traditional Initial Liquidity Offerings (ILO). Collaborated with frontend developers to integrate smart contracts with React and Web3.js, delivering seamless user experiences. Crafted frontend UI using Next.js and integrated with smart contracts utilizing web3 libraries like wallet-connect, Thirdweb, and ethers.js. Engineered smart contracts for various blockchain-based applications, focusing on security and performance.

Technologies: Next.js, Supabase, Supabase Auth, HTML, CSS, JavaScript, React, Thirdweb SDK, Ethers.js, Hardhat, Mocha, Chai

Sparkblox - USA

2022 - 2023

Sparkblox is a comprehensive project focused on delivering blockchain solutions for a variety of industry clients, emphasizing secure and efficient smart contract development and seamless frontend integration.

Assisted in developing and deploying blockchain solutions for various industry clients. Leveraged UUPS protocol for complete version control of NFT proxy contracts and utilized OpenZeppelin libraries such as ERC-2771, EIP-1559, and EIP712 to secure Meta Transactions for gasless NFT minting. Developed frontend interfaces for DApps using HTML, CSS, JavaScript, and React. Worked as a Web3 and frontend developer, mentoring frontend developers and building seamless integration between frontend and smart contracts using Thirdweb SDK and Ethers.js. Conducted unit testing of smart contracts with Hardhat, Mocha, and Chai to ensure high quality for open source projects achieving 100% test coverage.

Technologies: HTML, CSS, JavaScript, React, Web3, Thirdweb SDK, Ethers.js, Hardhat, Mocha, Chai

Slamcoin Project - United Arab Emirates

2020 - 2022

Slamcoin is a decentralized finance (DeFi) project focusing on lending, borrowing, and yield farming, which includes integrations with NFTs and smart contract security.

Led the development of DeFi platforms with features like lending, borrowing, and yield farming. Created Slam NFT and minting website using Solidity and ERC-721/1155 standards. Audited and secured smart contracts using OpenZeppelin libraries. Introduced staking and governance features in DApps to enhance user engagement by 30%. Applied Agile methodologies for project management, ensuring timely delivery and iterative improvement. Managed source code using Git and GitHub, maintaining version control and facilitating collaboration.

Technologies: OpenZeppelin, Web3, Git, Github

Ayala Responsive Web and E-commerce Enhancement - United Arab Emirates

2018 - 2020

This project focused on transforming the user experience through innovative web development techniques, specifically aimed at increasing engagement and improving usability across mobile and desktop platforms.

Supported the shift to a responsive web design using HTML, CSS, and JavaScript, leading to a 15% increase in mobile user engagement for the company's primary financial product. Developed new features for the e-commerce website, resulting in an 8% increase in user session duration. Developed dynamic frontend applications with React and Next.js; boosted page load speed by 50% and achieved a 30% increase in user retention through improved usability and accessibility.

Technologies: HTML, CSS, Javascript

Project list

Education

Expertise