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US5 - 100 Days In America - San Francisco
Finally, I got the opportunity to visit Silicon Valley - the high-tech haven where Google, Apple, and the headquarters of major tech giants are situated.
US4 - 100 Days In America - New Discoveries Amidst Melancholy
I'm sick - homesick. This place is pretty bland. I ain't in the mood to blog, but lemme give a brief update on my current life in Arizona.
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
Spilling the tea on my first US trip - from visa chaos to touchdown - so I stop retyping the same story to curious friends 10 times.
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.