Yulin Deng — AI application engineer, Python backend, 8 years in.
RAG, agents, enterprise integrations. Sharing what I build, learning from what you build.
Jarvis Registry ↗ · Contributor
Enterprise MCP & agent gateway.
Contributions: embedding reindexing · tool access controls
Python · MCP · AI infrastructure
Agentic Design Patterns CN ↗ · Learning resource
Agent design patterns with implementation examples, in Chinese and English.
AI agents · Design patterns · Chinese / English
| Focus | What I do |
|---|---|
| RAG & knowledge | End-to-end RAG: parsing, chunking, embedding, vector storage, retrieval, metadata filtering and cited answers. Query rewrite, intent detection, rerank and curated QA for messy enterprise docs. Multi-source sync (S3, Google Drive, SQL Server) with incremental, scheduled and manual modes. LlamaIndex · LangChain · Weaviate · OpenAI · AWS Bedrock |
| Agents & MCP | LangGraph agents with checkpointed state and session recovery. MCP servers for Google Workspace and SQL Server. PromptOps: prompts versioned outside the app repo and loaded by release tag. LangGraph · FastMCP · MySQL checkpointer · Docker Compose |
| Backend & data | Concurrent, network-heavy Python services and async task pipelines. MySQL indexing, transactions, locks, query tuning, sharding and disaster recovery. Redis cache penetration, breakdown and avalanche. FastAPI · Django / DRF · Flask · Celery · MySQL · Redis |
| Identity & access | Domain account lifecycle across internal systems: onboarding / offboarding, AD sync, MFA, permission-change alerts, vendor accounts. Spring Boot · Django · LDAP / AD · RocketMQ |
| Workflow automation | Jira Server / Data Center administration and extension, 100+ ScriptRunner Groovy scripts, custom REST endpoints, webhook → MQ integration across 10+ internal systems. Groovy · ScriptRunner · Jira REST API · Elasticsearch |
| AI-assisted engineering | Turning AI coding from chat into repeatable workflow: repo-level skills, AGENTS.md / CLAUDE.md, review checklists, safe boundaries. Claude Code · Codex · GitHub Copilot |
| Area | Tools |
|---|---|
| Languages | Python Java Go Groovy SQL |
| LLM & AI | LlamaIndex LangChain LangGraph FastMCP Weaviate OpenAI AWS Bedrock Prompt engineering Fine-tuning (LoRA) |
| Backend | FastAPI Django DRF Flask Celery Nameko Spring Boot MyBatis-Plus |
| Data | MySQL PostgreSQL Redis MongoDB Elasticsearch |
| Messaging | RabbitMQ RocketMQ Webhooks |
| Cloud & infra | Docker Docker Compose Kubernetes AWS Alibaba Cloud Git |
| Integrations | MCP LDAP / AD Jira Confluence ScriptRunner Feishu / Lark WeCom Google Workspace REST APIs |
中文介绍 · 展开阅读
AI 应用工程师，Python 后端，8 年开发经验。关注 RAG、Agent 与企业系统集成。这里记录我参与的开源项目与整理的学习资料，欢迎交流技术思路，也期待从你的经历中学习。
开源实践
- Jarvis Registry：企业 MCP 与 Agent 网关，参与 embedding 重建索引和工具访问控制等开发。
- Agentic Design Patterns CN：整理 AI Agent 设计模式的中英文资料，结合概念与实现示例学习。
工程方向
- RAG 与知识检索：覆盖解析、分块、Embedding、向量存储、检索召回、元数据过滤、答案生成与可追溯引用的完整链路；针对“召回不准、答案无标准”的场景，结合 Query Rewrite、意图识别、Rerank 与标准 QA 库。支持 S3、Google Drive、SQL Server 等多源数据的增量、定时与手动同步。
LlamaIndex · LangChain · Weaviate · OpenAI · AWS Bedrock - Agent 与 MCP：基于 LangGraph 构建 Agent，提供状态保存与会话恢复；封装 Google Workspace、SQL Server 的 MCP Server；PromptOps 让提示词独立于应用仓库管理，按 release tag 加载。
LangGraph · FastMCP · MySQL checkpointer · Docker Compose - 后端与数据：精通 Python，掌握并发编程与网络通信；深入理解 MySQL 索引、事务、锁机制，擅长 SQL 调优、分库分表与容灾；熟悉 Redis 线程模型，解决缓存穿透、击穿、雪崩问题。
FastAPI · Django / DRF · Flask · Celery · MySQL · Redis - 身份与权限：域账号全生命周期管理，覆盖入离职、AD 同步、MFA、权限变更预警和外采系统账号，连接内部系统，减少重复操作。
Spring Boot · Django · LDAP / AD · RocketMQ - 协作流程自动化：维护与扩展 Jira Server / Data Center，基于 ScriptRunner 开发 100+ Groovy 脚本，扩展 REST Endpoints，通过 Webhook → MQ 打通 10+ 内部系统。
Groovy · ScriptRunner · Jira REST API · Elasticsearch - AI 辅助工程：把 AI Coding 从“聊天式问答”变成可复用的工程流程，沉淀仓库级 Skill、AGENTS.md / CLAUDE.md、review checklist 与安全边界。
Claude Code · Codex · GitHub Copilot
工具箱
| 领域 | 工具 |
|---|---|
| 语言 | Python Java Go Groovy SQL |
| 大模型与 AI | LlamaIndex LangChain LangGraph FastMCP Weaviate OpenAI AWS Bedrock Prompt 工程 模型微调（LoRA） |
| 后端框架 | FastAPI Django DRF Flask Celery Nameko Spring Boot MyBatis-Plus |
| 数据 | MySQL PostgreSQL Redis MongoDB Elasticsearch |
| 消息 | RabbitMQ RocketMQ Webhook |
| 云与基础设施 | Docker Docker Compose Kubernetes AWS 阿里云 Git |
| 系统集成 | MCP LDAP / AD Jira Confluence ScriptRunner 飞书 企业微信 Google Workspace REST API |
如果你也在探索这些方向，欢迎交流具体问题、讨论实现方案，一起学习进步。
Let’s exchange ideas.
RAG, backend engineering, or a problem you’re working through.
Email me · Visit my website ↗
DeepSeek-chan art: community fan art collected in deepseek-chan-meme-pack (#050 and #123 by Zhihu artist @忻致知). A new pose every hour.