Lyu Jinhang
Verified Expert in Engineering
Full-stack Engineer and Developer
Shenyang, Liaoning, China
Toptal member since May 21, 2026
Lyu is a senior AI and full-stack engineer with 8+ years of experience building AI-powered applications, automation, and scalable software. He specializes in LLM integrations, RAG pipelines, AI APIs, embeddings, intelligent workflows, and AI-driven business operations, backed by strong expertise in Python, TypeScript, Node.js, React, and cloud technologies.
Portfolio
Experience
- Artificial Intelligence (AI) - 9 years
- MySQL - 8 years
- JavaScript - 8 years
- Full-stack - 7 years
- WordPress - 7 years
- React - 7 years
- Large Language Models (LLMs) - 5 years
- AI Tools - 4 years
Work Experience
Senior Software Engineer
Self-employed
- Built AI-powered features and back-end systems using JavaScript, Java, C#, ASP.NET, Python, Rust, MongoDB, and MySQL, enabling intelligent automation, real-time analytics, and seamless user experiences across mobile and web platforms.
- Built LLM-based application workflows using OpenAI APIs, prompt engineering, structured outputs, and back-end orchestration to support intelligent product features and automation use cases.
- Designed and implemented RAG pipelines using document ingestion, embeddings, vector search, context retrieval, and response generation to improve accuracy and relevance in AI-assisted workflows.
- Designed and optimized full-stack applications using Angular, PHP, Laravel, and WordPress, leading software architecture decisions, improving application performance, and implementing secure, scalable APIs for business-critical systems.
- Developed and maintained cross-platform mobile applications using React Native, TypeScript, and Node.js, integrating RESTful APIs and cloud services on AWS and Azure to deliver scalable, high-performance solutions for enterprise clients.
Senior Software Engineer
Dalian Jiejing Tech
- Developed scalable web applications and internal business systems using React, TypeScript, Node.js, Java, and cloud services.
- Designed back-end APIs and distributed services supporting enterprise automation workflows and real-time communication systems.
- Developed scalable blockchain-related web3 applications like decentralized finance and DEX.
Full-stack Web Developer
CodersClan
- Developed different custom WordPress themes and plugins.
- Implemented pixel-perfect and responsive front-end design.
- Collaborated with cross-functional teams in Agile development environments.
Junior Software Developer
Jinhu Tech
- Developed interactive web applications using JavaScript, React, HTML5, CSS3, and Angular, building responsive user interfaces and improving overall user experience across desktop and mobile platforms.
- Worked in 3D and graphics-based applications with WebGL and Three.js, creating real-time visualizations, animations, and immersive browser experiences optimized for scalability and performance.
- Built software using C++, Java, and C#, implementing back-end logic, object-oriented architectures, and cross-platform applications while collaborating in agile development environments.
Project History
JACO Hardware | Digital Marketplace App
SpiritSwap
https://spiritswap.finance/I played a full-stack web developer role on this project, working on both the front end and back end.
Kaltura Video Platform Website
https://corp.kaltura.comIn this project, I played a full-stack WordPress developer role, from building highly responsive and pixel-perfect front-end UI to developing/customizing a WordPress theme.
Lyu's Games
https://lyu-games.netlify.app/Property Cube Hub
https://admin-hk.propertycube.asia/I played a back-end developer role with some front-end contributions: I built the ASP.NET back end and some front-end components with Angular.
Education
Bachelor's Degree in Computer Science
Tsinghua University - Beijing, China
Skills
Libraries/APIs
Node.js, React, REST APIs, OpenGL, Vue, jQuery, React Query, WordPress API, WooCommerce API, Chart.js, OpenCV, Liquid, Shopify API, OpenAI API, Playwright, WebGL, Three.js, Recharts, Stripe, Amazon Marketplace Web Service (MWS), HubSpot API, GraphQL API, Babylon.js, Google Maps, Google Calendar API, Lodash, D3.js, HTML5 Canvas, Mobile HTML5, Socket.IO
Tools
Git, Figma, ChatGPT, Claude Code, Blender, GitHub, Claude, Advanced Custom Fields (ACF), Google Analytics, Gutenberg Editor, Jira, Expo, GitHub Copilot, Apache, Visual Studio, NPM, Gulp, Canvas
Languages
PHP, JavaScript, TypeScript, Java, GraphQL, HTML5, Python, HTML, CSS, C#, C++, C, Python Script, SQL, Bash, Shopify Liquid, Solidity, CSS3, C#.NET, Sass
Frameworks
Tailwind CSS, React Native, Next.js, JSON Web Tokens (JWT), Angular, Qt, .NET, Laravel, Bootstrap, CodeIgniter, Redux, Divi, Electron, Selenium, Spring Boot, PassKit, OAuth 2, NestJS, LangGraph, Symfony, Django, Laravel 5, ASP.NET, Material UI, Phaser.io, PixiJS, Express.js
Paradigms
API Architecture, Microservices, Object-oriented Programming (OOP), Database Design, Responsive Web Design (RWD), Search Engine Optimization (SEO), Automation, Event-driven Architecture, Microservices Architecture, REST, DevOps, Agile, Mobile Development, UI Design
Platforms
WordPress, Azure, HubSpot, WooCommerce, Shopify, Google Cloud Platform (GCP), Netlify, AWS IoT, Azure Functions, Visual Studio Code (VS Code), Ubuntu, Blockchain, AWS Lambda, Amazon Web Services (AWS), Apache Kafka, Vercel, Android, iOS, Linux, Docker, Calendly
Storage
MySQL, Database Management, Google Cloud, Data Pipelines, MongoDB, Amazon DynamoDB, PostgreSQL, WP Engine, NoSQL, Databases
Industry Expertise
Web Design, Project Management, Healthcare
Other
Software Architecture, RESTFul APIs, Architecture, Full-stack Development, Full-stack, CTO, APIs, Artificial Intelligence (AI), OpenAI, Workflow Automation, 2D to 3D, 3D, API Integration, Front-end, Back-end, Progressive Web Applications (PWAs), AI to WordPress, Communication, Tailwind UI, WordPress Themes, WordPress Design, WordPress Plugins, User Interface (UI), Design, Elementor, WordPress SEO, Ad Optimization, Core Web Vitals, Performance Optimization, Site Speed Optimization, Headless WordPress, UI Development, AI Agents, Anthropic, Minimum Viable Product (MVP), 3D Rendering, Integration, Charts, Data Engineering, Data Visualization, Data Analytics, Lovable, Computer Vision, CMS, WordPress Security, Front-end Architecture, Software Design, SEO Tools, Event Streaming, Shopify Theme, User Experience (UX), Front-end Development, Web Scraping, Custom WordPress, Video Streaming, AI-assisted Development, AI-generated Code, Internet of Things (IoT), Legacy Code, Event-driven Systems, AI Model Integration, AI Model Training, Image Processing, Web Applications, Shopify Customizations, Agentic Coding, Ajax, Caching, Custom Themes, Web Performance Optimization, Windows 10, Cursor AI, Software Development, Web3, Smart Contracts, Supabase Auth, Supabase, Technical Leadership, HIPAA, Casino Games, WebSockets, Amazon MSK, Apollo, CRM, LLM Integration, AI Tools, Large Language Models (LLMs), AI Integration, Agentic AI, Prompt Engineering, HubSpot CRM, CI/CD Pipelines, Performance, eCommerce, Agentic Workflow Design, Vite, Google SEO, Technical SEO, Performance Tuning, Staging, Yoast SEO, Booking Systems, OAuth, Workflows, Data Aggregation, Marketplaces, Mobile UX, Analytics, LiteSpeed Cache, IT Project Management, Cryptocurrency, Pixel Perfect, Payment APIs, Web Hosting, SAP ERP, Zone.js, Content Delivery Networks (CDN), Cloudflare, HTML5 Video, HTML5 Audio, CSS Animations, Version Control, Graphics, 3D Modeling, Game Development, Game AI, Multiplayer, Multiprocessing
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