# **Leo Ji（季 立豪）** --- **Full-stack Engineer (Frontend-focused)** 📍 **Santiago, Chile** 📞 **+56 929596839** ✉️ [cybermanhao@gmail.com](mailto:cybermanhao@gmail.com) 🔗 **LinkedIn:** [linkedin.com/in/leo-ji-966923393](https://linkedin.com/in/leo-ji-966923393/) 🇨🇱 **Work Authorization:** Valid 2-year Chile Work Visa --- ## 📝 **Professional Summary** Frontend-leaning full-stack engineer with 6 years of experience in building **data-heavy web applications**, large-scale **React** projects, and **Node/Python** backends. Strong background in **dashboards**, **analytics systems**, and **industrial business tools**. Experienced in cross-stack development, **RAG-based AI integration**, and independent project delivery. Currently seeking opportunities in international or Chile-based teams. --- ## 🛠️ **Technical Skills** - **Frontend:** React,Vue3,TypeScript,Pixi.js (WebGL), **SSR/SSG frameworks** (Next.js or ext), Less/Sass/TailwindCss - **Backend & AI:** Node.js,nest.js, Python (**Django**, **FastAPI**), **RAG**, WebSocket, REST APIs - **Data & Performance:** Pandas, Web Workers, large table processing, analytics integration - **Engineering:** Git, Linux, Basic Cloud & Docker --- ## 💼 **Work Experience** ### **Full-stack Engineer** **MCP-based AI Project (Private Company)** Hangzhou, China May 2025 – Sep 2025 (Relocated to Chile) - Developed a **Node.js server** for an MCP (Model Context Protocol) based AI customer service system. - Designed and implemented a **Node + Python hybrid backend architecture**, utilizing WebSocket for real-time communication. - Conducted **vectorization (for RAG)** and performance benchmarking on low-performance servers, optimizing response time under limited hardware conditions. - Built a **web demo interface** to help non-technical staff integrate legacy systems with the new AI workflow. - Independently developed a general-purpose **MCP client** (similar to Cherry Studio/Chatbox) for AI interaction and experimentation. Evaluated commercialization feasibility; provided strategic insights on usability and scaling cost considerations which led to the project's tactical pause. --- ### **Frontend Engineer** **Advanced Institute of Information Technology, Peking University** [aiit.org.cn](https://aiit.org.cn) Hangzhou, China Oct 2022 – Oct 2023 (Employment-based engineering role at a top-tier research institute) - Designed and implemented **dashboard-style web applications** for government-related engineering and public information projects. - Built **data visualization interfaces** based on aggregated public bidding and tender announcement data. - Developed **data ingestion and processing logic** (using Pandas) to collect and structure public-sector information for frontend consumption. - Built an **SEO-optimized information service website** using Gatsby, significantly improving content discoverability and performance. --- ### **Frontend Engineer** **Zhiyi Technology** Hangzhou, China Jul 2020 – Apr 2022 - Developed and maintained large-scale **React** and **TypeScript** applications for e-commerce data analysis and business intelligence tools. - Built complex **data-driven interfaces**, including waterfall-style content displays, dynamic dashboards, and high-performance charts using Pixi.js. - Integrated **Sensors Analytics (Shence) APIs** for deep user behavior tracking and event-driven analysis. - Improved performance of data-heavy features by using **Web Workers** for large table exports and long-running computations. - Collaborated closely with product and backend teams to support long-term iteration in a high-pressure production environment. --- ### **Junior Frontend Engineer** **Hanze Network Technology Co., Ltd.** China Apr 2019 – Apr 2020 - Worked on a well-known public-facing government platform supporting complex complaint and reporting workflows. - Implemented **UI components** and form-based interactions for data submission and review processes. - Collaborated with backend engineers to integrate APIs and ensure stability in a high-concurrency production environment. --- ### **Structural Engineer** **[Hangzhou Honyar Electrical Co., Ltd.]** China Jul 2018 – Apr 2019 - Responsible for structural design and mechanical analysis of industrial components. - Managed **Manufacturing BOM (Bill of Materials)**, ensuring high precision in material requirements and supply chain data. --- ## 🎓 **Education** **Bachelor of Engineering (B.Eng.) in Mechanical Engineering & Automation** Zhejiang University of Technology (ZJUT) Hangzhou, China | 2017 --- ## 🌐 **Languages** - **English:** Professional Working Proficiency (Confident in technical reading/writing) - **Mandarin Chinese:** Native - **Spanish:** Beginner (Currently enrolled in intensive learning) ---