US3 - 100 Days In America - The Beginning Of An Epic Journey
The stars have aligned, and HoangYell's dream is finally coming true! It's a journey through stars and stripes to reach Lady Gaga's sky.
US2 - Experiencing The US Visa Interview In Hanoi
Conquering the US visa in less than 24 hours. The step-by-step process from preparation to interview, and the happy ending for the first time in the capital.
US1 - Opportunity And Preparation For The First US Trip
In this blog series, I'll spill the tea on my journey, from start to end, just to satisfy my taste for flexing and to avoid annoying my Facebook friends with too many ostentatious posts.
AI Agents & Multi-Agent Systems: The 'Company of Robots' Mental Model
What's the difference between ChatGPT and an AI Agent? A mastery guide to tool calling, LangGraph orchestration, and why multi-agent is the architecture of 2026.
Caching & Redis: The 'Sticky Note' Mental Model
Why does Redis make everything faster? A mastery guide to cache invalidation (the hardest problem in CS), eviction strategies, and Redis data types.
CDN: The 'Local Convenience Store' Mental Model
Why does your image load instantly for users in the US but crawls in Vietnam? A mastery guide to CDN Edge Nodes, Cache-Control headers, and cache busting.
CI/CD Pipeline: The 'Factory Assembly Line' Mental Model
Why does 'works on my machine' still happen with Docker? A mastery guide to CI/CD pipelines, GitHub Actions, and zero-downtime Blue/Green deployments.
Database Indexing: The 'Library Card Catalog' Mental Model
Why does adding an index make a query 100x faster? A mastery guide to B-Trees, compound indexes, covering indexes, and the queries that kill your database.
