LLLeandro Limainblog.lls-software.com·Nov 2, 2025 · 23 min readReading through the US-EAST-1 Service Disruption Summary ReportOn October 19 and 20, 2025, the AWS North Virginia (us-east-1) region faced a disruption that took down services worldwide, from small websites to large e-commerce sites (including Amazon itself), banks and government services. According to AWS, the ...00
LLLeandro Limainblog.lls-software.com·Sep 11, 2025 · 10 min readIt's Time to Write TestsIntroduction I've been working on a reminder assistant that operates through WhatsApp. Essentially, you ask to be reminded of something at a certain point in time, and you receive a message when that time arrives. There are other features like recurr...00
LLLeandro Limainblog.lls-software.com·Sep 9, 2025 · 5 min readA path for improving LLM coding toolsIntroduction One thing you might notice when working with LLM-based coding tools is how much they struggle to get the right information into their context windows. LLMs usually know almost everything there is to know about libraries, code patterns, a...00
LLLeandro Limainblog.lls-software.com·Jun 7, 2025 · 5 min readAWS Lambda Cold Starts: Real-World Cost OptimizationNote on AI usage: this blog post was initially sent in a conversation format to a friend through Signal and converted into a blog post by Claude Opus 4. The content of it was created by myself, though the wording and the blog post format is by Claude...00
LLLeandro Limainblog.lls-software.com·Dec 15, 2024 · 10 min readMaking Error Paths Visible: Learning from Rust's Type SystemIntroduction Back when I first started with Python, my first web framework wasn’t Django or Flask — it was Tornado Web. I’m not sure of all the exact reasons why I started with it, but I’m thankful to this day that I did.. Tornado had this unique way...00