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The first decentralized exchange (DEX) on Chia blockchain.

Hashgreen Dex

Senior Frontend Developer at Hashgreen Labs

Yu Lin Cheng

HashgreenSwap

A web3 cryptocurrency extension wallet on Google Chrome

Hoogii Wallet

My Flutter-built personal website from 2020

Personal Website 2020

My personal website built with Astro in 2025.

Personal Website 2025

<html><head></head><body><div class="row general general-profile-12"><div class="col-sm-8"><h1>Yu Lin Cheng</h1><h4 style="color: #333333;">Senior Frontend Developer at Hashgreen Labs</h4><p>Frontend Developer, Specialize in Vue, React, and Flutter</p></div><div class="col-sm-4"><p style="text-align: right;"><span style="font-size: 13.36px;">Tainan, Taiwan<br>+886981352355<br>contact@rainforest.tools<br><a href="https://www.linkedin.com/in/yulin-cheng" style="color: #555555;" target="_blank" rel="nofollow noopener">https://www.linkedin.com/in/yulin-cheng</a><br></span><a href="https://rainforest.tools" style="color: #555555;" target="_blank" rel="nofollow noopener"><span style="font-size: 13.36px;">https://rainforest.tools</span></a></p></div></div><div class="row heading heading-work-experience-11"><div class="col-sm-12"><h2 style="color: #333333;">Work Experience</h2><hr style="border-color: #333333;"></div></div><div class="row repeater repeater-work-experience-11"><div class="col-sm-3"><p><span style="color: #888;">July 2022 - November 2024</span><br><span style="color: #888;">Taipei, Taiwan</span></p></div><div class="col-sm-9"><h3>Senior Frontend Developer</h3><h4 style="color: #555555;">Hashgreen Labs</h4><p><span style=" color: rgb(22, 29, 29);">Worked at a startup from the ground up, developing multiple frontend projects and selecting appropriate technologies to drive successful implementations.</span></p><ul><li><h4 style=" font-weight: inherit; color: rgb(25, 28, 28);"><span style="font-size: 16.7px;">OpenCGT</span></h4><ul><li><span style="font-size: 13.36px;">Led the frontend development for a B2B product built with Next.js, collaborating closely with designers and backend engineers to deliver a seamless user experience.</span></li><li><span style="font-size: 13.36px;">Designed and implemented social logins using Auth.js and Auth0, ensuring secure and efficient user authentication.</span></li><li><span style="font-size: 13.36px;">Implemented role-based authorizations using Casbin.js, providing fine-grained control over user access and permissions.</span></li><li><span style="font-size: 13.36px;">Set up an automated Continuous Integration/Continuous Deployment pipeline utilizing NX, streamlining the product release process and minimizing manual effort.</span></li></ul></li><li><h4 style=" font-weight: inherit; color: rgb(25, 28, 28);"><span style="font-size: 16.7px;">HashgreenSwap</span></h4><ul><li><span style="font-size: 13.36px;">Led the frontend development effort for the first Automated Market Maker (AMM) on Chia blockchain, collaborating with designers and backend engineers to deliver a seamless user experience.</span></li><li><span style="font-size: 13.36px;">Successfully introduced Nx, a monorepo tool, to streamline and maintain various aspects of our product, including unit tests, end-to-end tests, loading tests, and UI libraries.</span></li></ul></li><li><h4 style=" font-weight: inherit; color: rgb(25, 28, 28);"><span style="font-size: 16.7px;">Hoogii Wallet</span></h4><ul><li><span style="font-size: 13.36px;">As part of a collaborative effort with another frontend engineer, was responsible for designing and implementing the core functionality for app-to-extension interactions, including exposing APIs to browsers and ensuring seamless communication between our web3 cryptocurrency wallet extension and external applications.</span></li></ul></li><li><h4 style=" font-weight: inherit; color: rgb(25, 28, 28);"><span style="font-size: 16.7px;">Hashgreen Dex</span></h4><ul><li><span style="font-size: 13.36px;">Led the frontend development team in building the industry-first decentralized exchange (DEX) on the Chia blockchain.</span></li><li><span style="font-size: 13.36px;">Collaborated closely with designers and backend engineers to design, develop, and launch a seamless user experience that enabled secure and efficient trading of digital assets.</span></li><li><span style="font-size: 13.36px;">Utilized cutting-edge technologies like Next.js and Styled Components in conjunction with TailwindCSS.</span></li><li><span style="font-size: 13.36px;">Focusing on SEO and performance optimization, I successfully optimized the display of 500+ unique cryptocurrency assets, ensuring a seamless user experience for traders.</span></li></ul></li></ul></div></div><div class="row repeater repeater-work-experience-11 repeater-end"><div class="col-sm-3"><p><span style="color: #888;">Dec 2020 - June 2021</span><br><span style="color: #888;">Taipei, Taiwan</span></p></div><div class="col-sm-9"><h3>Software Intern</h3><h4 style="color: #555555;">Jubo Health</h4><ul><li><span style="color: rgb(25, 28, 28); font-size: 13.36px;">Maintain and develop applications for long-term care facilities.</span></li></ul></div></div><div class="row heading heading-education-8"><div class="col-sm-12"><h2 style="color: #333333;">Education</h2><hr style="border-color: #333333;"></div></div><div class="row repeater repeater-education-8"><div class="col-sm-3 col-xs-12"><p><span style="color: #888;">2019 - 2021</span></p></div><div class="col-sm-9 col-xs-12"><h3>National Taiwan University</h3><h4 style="color: #555555;">Computer Aided Engineering</h4></div></div><div class="row repeater repeater-education-8 repeater-end"><div class="col-sm-3 col-xs-12"><p><span style="color: #888;">2015 - 2019</span></p></div><div class="col-sm-9 col-xs-12"><h3>National Taiwan University</h3><h4 style="color: #555555;">Civil Engineering</h4></div></div><div class="row general general-skills-9"><div class="col-sm-3"><h2 style="color: #333333;">Frontend</h2><hr style="border-color: #333333;"><ul><li>Next.js</li><li>Vue.js</li><li>Flutter</li><li>TypeScript</li><li>JavaScript</li></ul></div><div class="col-sm-3"><h2 style="color: #333333;">Backend</h2><hr style="border-color: #333333;"><ul><li>Express</li><li>FastAPI</li><li>Node.js</li><li>Python</li></ul></div><div class="col-sm-3"><h2 style="color: #333333;">Tools</h2><hr style="border-color: #333333;"><ul><li>Nx (monorepo)</li><li>Vite</li><li>Docker</li><li>GitHub Actions</li><li>Terraform</li></ul></div><div class="col-sm-3"><h2 style="color: #333333;">Languages</h2><hr style="border-color: #333333;"><ul><li>Chinese — Native or Bilingual</li><li>English — Intermediate</li></ul></div></div></body></html>

Yu Lin Cheng Senior Frontend Developer at Hashgreen Labs Frontend Developer, Specialize in Vue, React, and Flutter Tainan, Taiwancontact@rainforest...

My Cake Resume

Frontend Developer, Specialize in Vuejs, Reactjs, and Flutter

National Taiwan University

Hashgreen Labs

Senior Frontend Developer

Senior Frontend Engineer

<h1>Yu Lin Cheng</h1><h4 style="color: #333333;">Senior Frontend Developer at Hashgreen Labs</h4><p>Frontend Developer, Specialize in Vue, React, and Flutter</p>

<p style="text-align: right;"><span style="font-size: 13.36px;">Tainan, Taiwan<br>+886981352355<br>contact@rainforest.tools<br><a href="https://www.linkedin.com/in/yulin-cheng" style="color: #555555;" target="_blank">https://www.linkedin.com/in/yulin-cheng</a><br></span><a href="https://rainforest.tools" style="color: #555555;" target="_blank"><span style="font-size: 13.36px;">https://rainforest.tools</span></a></p>

<h2 style="color: #333333;">Work Experience</h2><hr style="border-color: #333333;" />

<p><span style="color: #888;">July 2022 - November 2024</span><br /><span style="color: #888;">Taipei, Taiwan</span></p>

<h3>Senior Frontend Developer</h3><h4 style="color: #555555;">Hashgreen Labs</h4><p><span style=" color: rgb(22, 29, 29);">Worked at a startup from the ground up, developing multiple frontend projects and selecting appropriate technologies to drive successful implementations.</span></p><ul><li><h4 style=" font-weight: inherit; color: rgb(25, 28, 28);"><span style="font-size: 16.7px;">OpenCGT</span></h4><ul><li><span style="font-size: 13.36px;">Led the frontend development for a B2B product built with Next.js, collaborating closely with designers and backend engineers to deliver a seamless user experience.</span></li><li><span style="font-size: 13.36px;">Designed and implemented social logins using Auth.js and Auth0, ensuring secure and efficient user authentication.</span></li><li><span style="font-size: 13.36px;">Implemented role-based authorizations using Casbin.js, providing fine-grained control over user access and permissions.</span></li><li><span style="font-size: 13.36px;">Set up an automated Continuous Integration/Continuous Deployment pipeline utilizing NX, streamlining the product release process and minimizing manual effort.</span></li></ul></li><li><h4 style=" font-weight: inherit; color: rgb(25, 28, 28);"><span style="font-size: 16.7px;">HashgreenSwap</span></h4><ul><li><span style="font-size: 13.36px;">Led the frontend development effort for the first Automated Market Maker (AMM) on Chia blockchain, collaborating with designers and backend engineers to deliver a seamless user experience.</span></li><li><span style="font-size: 13.36px;">Successfully introduced Nx, a monorepo tool, to streamline and maintain various aspects of our product, including unit tests, end-to-end tests, loading tests, and UI libraries.</span></li></ul></li><li><h4 style=" font-weight: inherit; color: rgb(25, 28, 28);"><span style="font-size: 16.7px;">Hoogii Wallet</span></h4><ul><li><span style="font-size: 13.36px;">As part of a collaborative effort with another frontend engineer, was responsible for designing and implementing the core functionality for app-to-extension interactions, including exposing APIs to browsers and ensuring seamless communication between our web3 cryptocurrency wallet extension and external applications.</span></li></ul></li><li><h4 style=" font-weight: inherit; color: rgb(25, 28, 28);"><span style="font-size: 16.7px;">Hashgreen Dex</span></h4><ul><li><span style="font-size: 13.36px;">Led the frontend development team in building the industry-first decentralized exchange (DEX) on the Chia blockchain.</span></li><li><span style="font-size: 13.36px;">Collaborated closely with designers and backend engineers to design, develop, and launch a seamless user experience that enabled secure and efficient trading of digital assets.</span></li><li><span style="font-size: 13.36px;">Utilized cutting-edge technologies like Next.js and Styled Components in conjunction with TailwindCSS.</span></li><li><span style="font-size: 13.36px;">Focusing on SEO and performance optimization, I successfully optimized the display of 500+ unique cryptocurrency assets, ensuring a seamless user experience for traders.</span></li></ul></li></ul>

<p><span style="color: #888;">Dec 2020 - June 2021</span><br><span style="color: #888;">Taipei, Taiwan</span></p>

<h3>Software Intern</h3><h4 style="color: #555555;">Jubo Health</h4><ul><li><span style="color: rgb(25, 28, 28); font-size: 13.36px;">Maintain and develop applications for long-term care facilities.</span></li></ul>

<h2 style="color: #333333;">Education</h2><hr style="border-color: #333333;" />

<h3>National Taiwan University</h3><h4 style="color: #555555;">Computer Aided Engineering</h4>

<h3>National Taiwan University</h3><h4 style="color: #555555;">Civil Engineering</h4>

<h2 style="color: #333333;">Frontend</h2><hr style="border-color: #333333;"><ul><li>Next.js</li><li>Vue.js</li><li>Flutter</li><li>TypeScript</li><li>JavaScript</li></ul>

<h2 style="color: #333333;">Languages</h2><hr style="border-color: #333333;" /><ul><li>Chinese — Native or Bilingual</li><li>English — Intermediate</li></ul>

<h2 style="color: #333333;">Tools</h2><hr style="border-color: #333333;"><ul><li>Nx (monorepo)</li><li>Vite</li><li>Docker</li><li>GitHub Actions</li><li>Terraform</li></ul>

<h2 style="color: #333333;">Backend</h2><hr style="border-color: #333333;"><ul><li>Express</li><li>FastAPI</li><li>Node.js</li><li>Python</li></ul>