Dev.to·Friday, January 16, 2026

Dev.to - Friday, January 16, 2026

10 stories~15 min

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Stories Covered

V-Order optimization

V-Order optimize parquet file through sorting, row group distribution, encoding and compression. Disadvantage of V-order optimization is that it increase the write time by up to 15 but positive side is that it boost the data compression by 50% and data read time improve by 10% and also in some cases read time improve up to 50% as well. parquet engine can read it as a regular parquet file. V-Order is disabled by default In Fabric runtime 1.3 and higher versions, the spark.sql.parquet.vorder.enab

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From Chaos to Clarity: Building a Robust Log Aggregation Pipeline with Kafka (KRaft) and ELK

From Chaos to Clarity: Building a Robust Log Aggregation Pipeline with Kafka (KRaft) and ELK As systems grow into microservices, logs become fragmented. Debugging an issue often means SSH-ing into multiple containers or Grepping through scattered files. This is where Centralized Log Aggregation becomes non-negotiable. In this guide, we are going to build a production-grade logging pipeline from scratch. We will decouple log shipping from log indexing using Apache Kafka (running in the modern,

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Level 0 of my DevOps journey

Level 0 DevOps Summary: What I’ve Done 1 Created and Connected to an EC2 Instance You launched an AWS EC2 instance (Linux-based). Connected to it successfully using WSL on your local machine. Verified that you can log in and run commands on the server. 2 Configured SSH for Easy Access Updated your SSH config on WSL (~/.ssh/config) to simplify connections. Corrected HostName usage (only hostname/IP, not username). Verified key permissions (chmod 600) to ensure secure SSH access. Cr

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❌ Stop Using Singleton. You Don’t Need It (And It’s Quietly Hurting Your Code)

Stop Using the Singleton Pattern The Singleton pattern looks simple and useful. It is also one of the most common causes of hidden design problems in software systems. Singleton ensures that a class has only one instance and that this instance can be accessed globally. Logger.getInstance().log("Hello"); One instance. Global access. Singleton is just global state. Any part of the code can access it, change it, and depend on it without being explicit. This makes systems harder to understand, t

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The Ultimate Python Roadmap: Learn Step by Step

Python is one of the most beginner-friendly and versatile programming languages. You can use it for many things like building websites, working with data, automating tasks, creating backend systems, or even getting started with AI. To learn Python, there’s a lot to cover: basics, data types, loops, functions, OOP, and more. But don’t worry, you’re in the right place. I’ve put together a step-by-step Python roadmap to guide you through everything in a clear and logical order. Let’s jump right int

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🧱 Building QRForge PRO with PySide6 (Beginner-Friendly Guide)

This tutorial is a Dev.to–style, step-by-step walkthrough of the QRForge PRO v2.0.0 desktop application. We’ll progressively build a professional QR code design studio using: 🐍 Python 🖼 PySide6 (Qt for Python) 🔳 qrcode 🧠 GraphicsScene / GraphicsView 📤 PNG, SVG, and PDF exports 👉 Full source code: https://github.com/rogers-cyber/QRForgePRO 0️⃣ What You’ll Build By the end, you’ll have an app that can: Generate QR codes from Text, URLs, and Wi‑Fi credentials Customize colors, backgrounds, tr

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I built a lightning-fast statistics platform for Poland

I needed Polish demographic data for a project and kept running into the same problem. The official statistics site (GUS) was slow, confusing, and the language they use is pretty hard to parse even if you speak Polish. And ChatGPT kept giving me different numbers every time I asked. So I thought, why not just build something better? You click on any region in Poland and you get the stats. Thats it. No loading, no waiting, no confusing navigation. You can go from the whole country down to voivode

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Did you know?

The cloud isn’t just about speed and flexibility, it can also help businesses go green. By using shared resources instead of running their own servers, companies reduce energy use and cut down on waste. Cloud sustainability means designing systems that are efficient, cost-effective, and environmentally friendly. Do you think businesses care more about saving costs when moving to the cloud?

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Implement Enter/Exit Animations with Angular CDK Overlay

Angular CDK's Overlay module provides a powerful way to create floating panels that appear over your application's content. These overlays are commonly used for dropdowns, tooltips, modals, and context menus. While overlays work great out of the box, adding smooth enter and exit animations can significantly enhance the user experience. In this article, we'll explore how to implement sophisticated enter/exit animations with Angular CDK Overlay using signals, dynamic animation classes and understa

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Developer? Or Just a Toolor?

I started my career as a frontend developer. Write a few lines of code, something appears on the screen. Create a button, it actually clicks. What I built actually worked. It was simple. The output was tangible. The program existed. Back then, I thought that was "development." As my corporate tenure extended, something felt off. Am I actually developing? Or am I just grinding through tasks like some glorified day laborer? JavaScript. TypeScript. React. Vue. I wasn't leveraging these tools to arc

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