Miguel Garcia @MLinesCodes
Software Engineer | IA | Graphic Designer | Technology Lover 404 Joined February 2025-
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Outbox pattern explained 👇
Indexes are one of the most critical concepts for databases. But to use them effectively, you need to know how they work under the hood. Here are the fundamental concepts that every backend engineer should know: ↓
𝗛𝗼𝘄 𝗱𝗼𝗲𝘀 𝗦𝗽𝗼𝘁𝗶𝗳𝘆 𝘀𝘁𝗿𝗲𝗮𝗺 𝗺𝗶𝗹𝗹𝗶𝗼𝗻𝘀 𝗼𝗳 𝘀𝗼𝗻𝗴𝘀 𝘀𝗶𝗺𝘂𝗹𝘁𝗮𝗻𝗲𝗼𝘂𝘀𝗹𝘆 𝘄𝗶𝘁𝗵𝗼𝘂𝘁 𝗯𝘂𝗳𝗳𝗲𝗿𝗶𝗻𝗴? Spotify relies on a 𝗺𝗶𝗰𝗿𝗼𝘀𝗲𝗿𝘃𝗶𝗰𝗲𝘀 𝗮𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁𝘂𝗿𝗲 hosted primarily on Google Cloud Platform (GCP), where hundreds of…
How do you draw architectural diagrams? One of the most popular approaches is using UML diagrams. However, there's also the C4 model. C4 stands for: - (System) Context Diagram - Container Diagram - Component Diagram - Code Diagram It's a lightweight model to describe your…
Queues in System Design ➤ Role of Queues → Enable asynchronous communication between services → Decouple producers and consumers → Improve scalability, reliability, and fault tolerance → Handle spikes in traffic by buffering requests ➤ Apache Kafka → Definition: A…
SQL, NoSQL, or something else — how do you decide which database? Going back on a bad database choice can be time-consuming and expensive. Before we dive into the factors to take into account when choosing an appropriate database, let’s examine the characteristics of the most…
𝗛𝗼𝘄 𝘁𝗼 𝘀𝗰𝗮𝗹𝗲 𝗮𝗻 𝗮𝗽𝗽 𝘂𝗽 𝘁𝗼 𝟭𝟬 𝗺𝗶𝗹𝗹𝗶𝗼𝗻 𝘂𝘀𝗲𝗿𝘀 𝗼𝗻 𝗔𝘇𝘂𝗿𝗲 I've just released the new issue of my 𝗻𝗲𝘄𝘀𝗹𝗲𝘁𝘁𝗲𝗿 to more than 47,000 addresses, where we break down the exact steps to grow from one user to planetary scale. Most engineers…
Model Evaluation in LLMs Perplexity → Measures how “confused” the model is when predicting the next word → Lower perplexity = better (the model is less surprised by the data) → Think of it like a teacher checking if a student consistently “guesses” the next sentence…
modern dashboard for managing and monitoring Kubernetes clusters
At some point, every programmer needs to work with code that makes them cringe. The urge to make code better is normal and often right. But poorly planned refactoring can make your code worse than it was. Here are 7 things to keep in mind before your next refactoring: 1.…
At some point, every programmer needs to work with code that makes them cringe. The urge to make code better is normal and often right. But poorly planned refactoring can make your code worse than it was. Here are 7 things to keep in mind before your next refactoring: 1.…
If I had to load balance traffic, here are 6 algorithms I'd consider:
Types of Database
Testing (Unit, Integration, End-to-End) Why Testing Matters → Testing ensures backend applications are reliable, secure, and maintainable. → It reduces production bugs, improves developer confidence, and speeds up deployment cycles. → Without testing, small errors can grow…
6 Steps to Create a New AI Model
𝗛𝗼𝘄 𝗱𝗼𝗲𝘀 𝗗𝗶𝘀𝗰𝗼𝗿𝗱 𝗵𝗮𝗻𝗱𝗹𝗲 𝗮 𝗺𝗶𝗹𝗹𝗶𝗼𝗻 𝗼𝗻𝗹𝗶𝗻𝗲 𝘂𝘀𝗲𝗿𝘀 𝗶𝗻 𝗮 𝘀𝗶𝗻𝗴𝗹𝗲 𝘀𝗲𝗿𝘃𝗲𝗿? As time passed, the overall size of Discord's user base, including its most prominent communities, has grown massively. This affected servers, which started…
DevOps vs SRE vs Platform Engineering 👇 𝘿𝙚𝙫𝙊𝙥𝙨 𝙀𝙣𝙜𝙞𝙣𝙚𝙚𝙧𝙨 drive efficient and reliable software delivery by bridging the gap between development and operations teams 𝙎𝙞𝙩𝙚 𝙍𝙚𝙡𝙞𝙖𝙗𝙞𝙡𝙞𝙩𝙮 𝙀𝙣𝙜𝙞𝙣𝙚𝙚𝙧𝙨 concentrate on optimizing the reliability,…
I made a magic quadrant about how to choose your tech stack Seriously, DYOR: no one will do it for you. Try out stuff. See what works. Ignore reports from people who don't do the work and are pay-to-play anyway
AI is making code reviews faster (and better). Here’s how: Without AI, by the time a PR is reviewed, the engineer has often moved on. Context is cold. Iteration is slow. That's why CodeRabbit provided not just code reviews in pull requests, but in the IDE. They've just taken…
How Java Works
𝗛𝗼𝘄 𝗱𝗼𝗲𝘀 𝗪𝗵𝗮𝘁𝘀𝗔𝗽𝗽 𝗵𝗮𝗻𝗱𝗹𝗲 𝗯𝗶𝗹𝗹𝗶𝗼𝗻𝘀 𝗼𝗳 𝗺𝗲𝘀𝘀𝗮𝗴𝗲𝘀 𝗲𝘃𝗲𝗿𝘆 𝗱𝗮𝘆? WhatsApp is built on a 𝗵𝗶𝗴𝗵𝗹𝘆 𝗼𝗽𝘁𝗶𝗺𝗶𝘇𝗲𝗱 𝗲𝘃𝗲𝗻𝘁-𝗱𝗿𝗶𝘃𝗲𝗻 𝗮𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁𝘂𝗿𝗲, where services for messaging, calls, media sharing, status, and…
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