When integrating multiple external systems, treat each integration as an independent strategy and use a factory to select the implementation at runtime. Differences stay isolated in their own implementations; the main flow only cares about ‘who to call’ and ‘how to orchestrate’.

A production-oriented MCP (Model Control Plane) orchestration system designed to manage agentic workflows with statefulness, extensibility, cost control, and multi-step reasoning capabilities.

A production-ready semantic search system that separates recall and precision through a multi-stage retrieval pipeline. Combines Milvus vector search, distance-based filtering, and Cross-Encoder reranking for high-quality retrieval results.

These three mechanisms solve different problems at different layers: distributed locks protect business execution, row locks protect data mutation, and transactions define lock scope and atomicity.

Treat recent search history as ephemeral user behavior, not core business data. Redis Sorted Sets provide a natural fit: O(log N) writes, automatic ordering, de-duplication, and bounded size—all without turning a lightweight behavior signal into a database concern.

Node.js achieves high concurrency not by multi-threading, but through its event-driven, non-blocking I/O model. It efficiently overlaps I/O waiting time across requests, allowing a single thread to handle thousands of connections.

OpenSearch is built for search, not for storage. Its architecture prioritizes high-performance retrieval and aggregation, not transactional integrity or consistency.

An in-depth exploration of the architecture and implementation of a group chat system, covering group creation, subscription, real-time messaging, and gRPC-based communication between microservices.

An in-depth look into the one-to-one chat architecture and its implementation for handling text and media messages.

A modular backend system for managing travel expenses, built with Node.js and Express, featuring microservices, message queues, and integration with third-party APIs.

A scalable, real-time chat platform leveraging Web3 authentication, microservices architecture, and message queuing for high concurrency and performance.