Open to opportunities

GuiYing Li

@kernanmk

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Blockchain full-stack developer specializing in smart contracts, web3, and scalable scraping systems.

China

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What I'm looking for

I seek roles building production-ready web3 and full-stack systems—smart contracts, scalable backends, responsive frontends, and secure data pipelines, with a collaborative team focused on quality and growth.

I am a blockchain full-stack developer with over seven years of experience building smart contracts, DApps, and robust scraping systems. I combine backend, frontend, and blockchain expertise to deliver end-to-end decentralized solutions and data pipelines.

I have hands-on experience creating multi-chain Solidity contracts, Merkle-tree whitelist presales, vesting schedules, staking and NFT marketplaces, and subgraph-based analytics. I implemented encrypted messaging, IPFS storage, and zero-gas lazy mint systems across multiple projects.

On the backend I design scalable services with Node.js/Express, Django, Laravel and data layers using MongoDB, PostgreSQL, and MySQL, and I deploy and maintain environments on AWS and Docker. I also build responsive frontends with React, Redux, Next.js, TailwindCSS and Material UI.

I enjoy solving anti-blocking and scraping challenges using Selenium, BeautifulSoup and custom crawlers, and I continuously contribute side projects while learning new tools. I communicate in English and Japanese and focus on secure, production-ready implementations.

Experience

Work history, roles, and key accomplishments

Scraping Developer

Re.Co. Ltd

Oct 2024 - Jul 2025 (9 months)

Configured a Django+React Docker development environment and developed scraping modules to extract company, profile, article, and post data from Facebook, Twitter, LinkedIn and other platforms, improving data capture reliability.

Python Django React Docker Selenium BeautifulSoup Web Scraping

Blockchain Fullstack Developer

myMessage Foundation Pte. Ltd

Oct 2022 - Sep 2024 (1 year 11 months)

Developed multi-chain Solidity contracts for token presale/vesting and built React/TypeScript frontends, Node.js/Express backends and PostgreSQL admin dashboards to monitor presale and manage decentralized social features.

NodeJS Solidity React TypeScript Express PostgreSQL Web3.js TailwindCSS

Blockchain Developer

CASPER-PAD.Co, LTD

Feb 2022 - Sep 2022 (7 months)

Designed token presale, vesting and airdrop contracts with Merkle-tree whitelist and implemented anti-blocking scraping mechanisms; maintained staging and production servers on AWS EC2.

Solidity Smart Contracts Web3.js AWS EC2 CAPTCHA Mitigation

Web and Blockchain Developer

Self Employed

May 2021 - Aug 2022 (1 year 3 months)

Built decentralized social media, NFT marketplaces, staking/farming systems and P2E game frontends; implemented IPFS storage, encrypted messaging, Merkle whitelist airdrops, and Subgraph/Moralis integrations for blockchain data.

Web3.js Moralis IPFS Solidity MongoDB Redux

Full Stack Developer

Self Employed

Nov 2018 - Mar 2020 (1 year 4 months)

Delivered full-stack projects using React, Node.js, Express and Laravel; implemented JWT/Passport authentication, social logins and integrated third-party APIs while managing front-end state with Redux.

NodeJS React Express Laravel JWT Passport.Js Redux MySQL Vue.Js

PHP Web Developer

Winlight.co, Ltd

Jan 2018 - Oct 2018 (9 months)

Developed full-stack LAMP applications using PHP (OOP), Laravel and WordPress, implemented real-time database updates with Firebase and deployed scalable infrastructure on AWS EC2.