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Yunfeng W
@yunfeng_java
Java Backend Developer for RAG AI Agents and Workflows
China
Chinês
Sobre mim
I build Java backends and AI applications that connect your documents, data, and business systems. With 10 years in Java development and experience as a technical lead and team leader, I deliver APIs, microservices, RAG knowledge bases, AI agents, and automated workflows. I work with Spring Boot/Cloud, Dify, RAGFlow, and GPUStack, covering development, integration, deployment, and performance tuning. I collaborate through written messages and clear project documentation.
Habilidades
Yunfeng W
offline •
Conheça meus serviços
Integrações de IA
I will build a dify rag chatbot and integrate your business apis
Correções de bugs
I will fix a java spring boot bug or rest API error
Experiência profissional
Java Engineer - Alibaba Cloud City Brain via Beyondsoft
Beyondsoft
Sep 2019 - Oct 2022 • 3 yrs 1 mo
ALIBABA CLOUD CITY BRAIN PROJECT | Sep 2019-Oct 2022 Assigned to Alibaba Cloud's City Brain department through my employer, Hangzhou Beyondsoft Information Technology Co., Ltd. Built Java backends for public-sector applications, smart-campus systems, video-processing services, and shared infrastructure. Designed and deployed selected systems; implemented microservices, Elasticsearch storage, distributed transactions, Kubernetes deployment, logging, and tracing. Mentored developers and supported technical interviews. OTHER EMPLOYERS - SEPARATE CAREER HISTORY The following roles were with different employers, outside the Alibaba Cloud assignment and Beyondsoft employment. 杭州九域信云科技有限公司 | Jul 2025-Present Own Java backend and AI development across 星桥, 星御, 星问, 星听, and 星练. Build APIs, RAG knowledge bases, AI agents, workflows, real-time transcription, and meeting assistants. Integrate Dify, RAGFlow, and GPUStack in 星练 for workflow orchestration, knowledge retrieval, and model serving. 杭州云象网络技术有限公司 (Yunphant) | Nov 2022-Jul 2025 Built Java systems for recruitment, education administration, and LLM applications. Technical lead on an education management project and managed a technical team. Designed microservices, tuned performance, connected knowledge bases to LLMs, and built approval workflows and resume-screening features. 上海票据交易所股份有限公司 | Apr 2018-Sep 2019 Developed Java business systems and technical designs, resolved production issues, and helped troubleshoot Oracle SQL. 集时科技有限公司 | Nov 2016-Mar 2018 Built bank-security backend features, delivered client changes and releases, implemented e-commerce promotions, and independently developed an application backend and management system. 浙江鸿程计算机系统有限公司 | Sep 2015-Jun 2016 Contributed to Java product development, system operations, and testing support.
