Sunny (Shenzhen)

Senior .NET engineer and open-source contributor with over ten years of hands-on engineering experience. Specialized in C# backend architecture, NuGet SDK development, and distributed system design, with broad experience across big-data ingestion and retrieval, AI/LLM integration, IoT device orchestration, and 3D scene delivery. Led provincial key projects and million-scale data platforms, maintains 70+ public GitHub repositories, and publishes open-source SDKs for the global .NET community.

• Deep .NET ecosystem practice: Expert in .NET 6/7/8/9/10, ABP Framework (DDD layering, multi-tenancy, permission systems), and EF Core; led microservice architectures and modular application development.
• NuGet SDK development: Independently designed and published production-grade .NET SDKs for cloud services, AI models, and big-data parsing, following dependency injection, async-first APIs, multi-target frameworks, and multilingual documentation standards.
• AI & LLM integration: Authored DashScope.Net and CloudflareAI.DotNet SDKs; integrated dify and Ollama local LLMs for intelligent unattended live-streaming interaction, content generation, and bullet-chat semantic understanding.
• Distributed & high-concurrency processing: Large-scale data ingestion, high-concurrency distributed crawling, Common Crawl parsing, MongoDB/Elasticsearch million-scale search, async pipelines, ETL, and aggregate analysis.
• Industrial-grade device orchestration: Architected central control for 10,000+ square meter exhibition spaces and 100+ devices, covering clock synchronization, TCP/IP and serial communication, synchronized scheduling, and disaster recovery.
• Frontend & cross-platform development: Skilled with JavaScript/TypeScript, Vue 3, Blazor Server/WASM, THREE.JS 3D scene rendering, UNI-APP mini programs, and MAUI cross-platform desktop applications.
• Embedded & robotics systems: Arduino/ESP32 hardware drivers, 3D printing, and microcomputer control for distributed modular collaboration and automation.
• DevOps & continuous delivery: GitHub Actions CI/CD, Docker/Kubernetes deployments, Selenium WebDriver E2E testing, and automated NuGet publishing pipelines.

• Backend/Distributed: C#/.NET 6+, ABP Framework, Dapr, Quartz.NET, EF Core, SignalR, HangFire
• SDK/NuGet Libraries: CommonCrawl.Net, DigitalOcean.Net, DashScope.Net, CloudflareAI.DotNet, MusicBrainz.Net
• Big Data/AI: MongoDB, Elasticsearch, Common Crawl, dify, Ollama, ML.NET, OpenCV/Emgu CV, Tesseract OCR
• Frontend/Cross-platform: JavaScript, TypeScript, Vue 3, Blazor Server/WASM, Ant Design Vue, Element UI, ECharts/Chart.js, THREE.JS, UNI-APP, MAUI
• IoT/Embedded: Arduino, ESP32, TCP/IP, serial communication, clock synchronization (NTP)
• DevOps/Testing: GitHub Actions, Azure DevOps, Docker, Kubernetes, Selenium WebDriver, Allure
• Other: Redis, IdentityServer, RESTful API, JWT, OAuth2.0, SourceLink, Agile development

Open-Source .NET SDK Libraries

Independently designed and maintained multiple open-source SDK libraries for the .NET ecosystem, consistently following dependency injection, async-first APIs, multi-target framework compilation, and multilingual documentation standards.

SDK Library	Description	Technical Highlights
CommonCrawl.Net	Common Crawl web archive parsing library	WARC parsing, Parquet index reading, resume support, IAsyncEnumerable<T> streaming
DigitalOcean.Net	DigitalOcean cloud API client	40+ resource categories, OpenAPI code generation, strongly typed DTOs
DashScope.Net	Alibaba Cloud DashScope/Tongyi Qianwen LLM SDK	Chat/video generation APIs, function calling, SSE streaming
CloudflareAI.DotNet	Lightweight SDK for Cloudflare Workers AI	SSE streaming output, model discovery and metadata mapping, environment-based configuration
MusicBrainz.Net	MusicBrainz music metadata client	Media information retrieval, video download, metadata parsing

ExchangeRates — Automated International Exchange Rate Service ⭐5

• Fully automated international exchange rate data service built with GitHub Actions, syncing every hour with continuous stable operation.
• Covers major global currencies, outputting both full and compact JSON formats with ISO 4217 compliance.
• Earned 5 GitHub stars as the highest-starred personal project and has been adopted by external developers.

ExchangeRates project repo

Provincial Key Exhibition Hall System — Large-Scale Device Orchestration & 3D Scene Display

• Led architecture and implementation for a provincial key exhibition hall spanning over 10,000 square meters, integrating 100+ screens, projectors, AV systems, lighting, and automated mechanical devices.
• Built C#/.NET central-control backend and scheduling services, managing hardware by zones through TCP/IP and serial protocols with grouped synchronization and show-mode switching.
• Developed NTP/private clock synchronization mechanisms with millisecond-level trigger precision across all terminals.
• Implemented distributed fault diagnosis, disaster recovery scheduling, device health monitoring, and remote abnormal alerts.
• Delivered multi-screen 3D scene rendering and visual-effect orchestration with THREE.JS, including virtual roaming, holographic projection, and dynamic particles.
• Led stable delivery of health monitoring and automated scheduling systems, earning strong stakeholder recognition.

Global-sites — Distributed Big Data Collection & Million-Scale Search

• Led high-concurrency data collection and content analytics supporting real-time processing and retrieval of millions of web records.
• Built a .NET distributed scheduling architecture, using the self-developed CommonCrawl.Net SDK to ingest Common Crawl datasets, batch parse WARC files, and extract page structure and metadata.
• MongoDB sharded clusters + Elasticsearch full-text indexing for querying and aggregating hundreds of GB of data.
• Designed deduplication and cleansing pipelines to improve statistical and analytical accuracy.
• Built extensible batch ETL pipelines as a reusable high-quality data foundation.

Global-sites project repo

Smart Beauty Management Platform (beauty)

• Delivered modular backend development with .NET Core + Dapr microservices, EF Core modeling, and efficient querying.
• Implemented real-time logging and operational analytics with Elasticsearch.
• Built Vue.js + TypeScript + Ant Design Vue frontend experiences with unified APIs and decoupled business modules.
• Launched UNI-APP mini programs for WeChat, Alipay, Douyin, and other mainstream platforms.
• Unified API gateway across mobile, web, and mini programs with automated deployment, role-based permissions, push messaging, and third-party payment integration.

beauty project repo

Unattended Matrix Live Streaming Platform (mt)

• Built a matrix-style unattended live-streaming platform with automated recovery, remote streaming, bullet-chat interaction, and audience behavior analytics.
• .NET Core + SignalR for real-time interaction, Quartz.NET for automated live scheduling, and Docker for elastic deployments.
• AI integration: authored DashScope.Net SDK for Tongyi Qianwen models and integrated dify and Ollama for automatic bullet-chat replies, content generation, and business script planning.
• Multi-platform, multi-account automated operations with containerized high-concurrency processing.

mt project repo

Vision Recognition Platform (Vision)

• Applied OpenCV for .NET/Emgu CV image processing, Tesseract OCR, and ML.NET machine-learning model integration.
• ABP microservice architecture with multi-tenancy, fine-grained permissions, and modular DDD layering.
• Decoupled Blazor/Vue frontend design with Docker-based automated testing and deployment.

Vision project repo

Embedded Robotics & IoT Assembly

• Controlled servos, robotic arms, and sensors on Arduino platforms, combined with open-source 3D printing for modular assembly.
• Connected multiple microcontroller modules for simple voice interaction, robot action decisions, online upgrades, and multitask collaboration.
• Applied in educational scenarios and intelligent exhibition displays.

ABP Enterprise Business Systems

• Deep ABP Framework practice across GuorunAbp, OpenHub, Soobn.Music, and related projects.
• Modular domain-driven design with full Application/Core/EntityFrameworkCore/Web layering.
• Multi-database support, IdentityServer authentication, fine-grained permissions, and multi-tenancy.
• HangFire background jobs, Redis distributed caching, and SignalR real-time push.
• Complex Vue 3/Blazor frontend development supporting multiple business domains.

Selenium WebDriver Automated Testing Platform

• End-to-end UI automation testing with Allure reports, integrated with GitHub Actions CI/CD for efficient acceptance.
• Browser automation with Puppeteer/Selenium applied to regression testing and data collection scenarios.

China National Open University
Major: Computer Information Management

• Foundational C# with Microsoft
  freeCodeCamp · Issued: Oct 2025
  Certificate ID: sunny-dotnet-fcswm

• Multi-domain hands-on experience across big data, IoT, AI/LLM, exhibition device orchestration, embedded robotics, and 3D/mini-program delivery.
• Proven ability to independently design and publish production-grade NuGet SDK libraries following industry-standard open-source practices.
• Strong complex-system integration capability, especially in high-concurrency and multi-protocol hardware scenarios.
• Passionate about open source and knowledge sharing, with strong communication and coordination skills.

• 70+ public GitHub repositories covering SDK libraries, big data, AI, IoT, automation, 3D, mini programs, and more.
• Published multiple NuGet open-source packages with multilingual documentation (Chinese/English/Japanese/French) for global .NET developers.
• Continuously participates in technical communities and industry exchanges.

• Chinese (native)
• English (able to read technical documentation and resources)