Hey, I’m Sanfu Yee (Pengfei Li)
A software engineer based in Beijing with 10+ years of experience in backend development, distributed systems, and AI infrastructure. I specialize in building scalable, high-availability platforms that bridge the gap between cutting-edge AI models and production-ready services.
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Education
| Degree | University | Major | Period |
|---|---|---|---|
| M.S. | University of Science and Technology of China | Computer Applied Technology | 2013 โ 2016 |
| B.S. | Wuhan University | Computer Science and Technology | 2009 โ 2013 |
Core Competencies
- Backend & Architecture โ 10+ years across fintech, e-commerce, and AI; building high-availability systems with K8s, Istio, and Prometheus
- Distributed Systems โ Golang / Java / Python; microservices, DDD, TiDB, Kafka, gRPC
- AI Engineering โ MaaS platform for DeepSeek-V3/R1 and text-to-video models; inference optimization with vLLM and TensorRT-LLM; RAG/Agent deployment
- CS Fundamentals โ Strong foundation in algorithms, networking, and systems; first-principles debugging
Work Experience
| Company | Role | Highlights | |
|---|---|---|---|
| ๐ฅ | HPC-AI Tech | MLOps Engineer, 2024 โ Present | GPU cloud platform with Karmada multi-cluster K8s; MaaS platform for DeepSeek-V3/R1 and text-to-video/image models; billing, rate limiting, and multi-tenant auth |
| ๐ | WPS | Expert Engineer, 2023 โ 2024 | Productionized LLM features (intent recognition, RAG, PPT-Agent); inference acceleration with TensorRT-LLM and vLLM |
| ๐ฌ | IDEA Institute | AI Full Stack Engineer, 2021 โ 2023 | GTSFactory framework for generative AI research |
| ๐ | Shopee | Senior Software Engineer, 2018 โ 2021 | CRM push platform serving 600K+ sellers / 30M+ daily pushes; membership system; real-time WebChat |
| ๐ฆ | WeBank | Software Engineer, 2016 โ 2018 | Mobile banking authentication and KYC compliance |
Tech Stack
Languages: Golang, Java, Python
Frameworks: Go-Zero, EntGo, Gin, gRPC, Spring Boot, Spring Cloud, FastAPI, Django, Celery
Infrastructure: Kubernetes, Docker, Helm, Istio, Prometheus, Alertmanager, CI/CD
Databases & Storage: PostgreSQL, MySQL, TiDB, Redis Cluster, etcd, Elasticsearch, Milvus
Messaging: Kafka, RabbitMQ
AI/ML: vLLM, SGLang, TensorRT-LLM, Kubeflow, RAG, LLM, VLM
Get in Touch
- Email โ sanfuyee@gmail.com
- WeChat โ
sanfuyeeisme