Applying Design Patterns and SOLID Principles in Real-World Projects

Welcome to the first episode of our "Design Patterns" series! In this tutorial, we dive deep into the Factory Method pattern—one of the most essential creational design patterns in software architecture. What you'll learn in this video: ✅ The core problem of tight coupling and why direct object instantiation (the "new" keyword) can be problematic. ✅ A real-world analogy (The Restaurant Analogy) to help you visualize the pattern. ✅ Step-by-step implementation in TypeScript: from defining the Product interface to creating Concrete Creators. ✅ When to use the Factory Method in your own projects to improve maintainability and extensibility. Whether you're a beginner or an experienced developer looking to sharpen your architectural skills, this guide will provide you with a solid foundation for building scalable applications. 🔔 Don't forget to subscribe to follow the rest of the Design Patterns series! In the next episode, we'll explore the Abstract Factory pattern. #TypeScript #DesignPatterns #SoftwareArchitecture #CodingTutorial #FactoryMethod #WebDevelopment #Programming #SoftwareEngineering https://lnkd.in/dzmaRr_J Factory Method Pattern, TypeScript Tutorial, Design Patterns, Creational Design Patterns, Software Architecture, Clean Code, TypeScript Programming, Logistics App Example, Factory Method TypeScript, Programming for Beginners, Advanced TypeScript, Coding Patterns.

Every senior dev thinks in patterns. Every junior dev should, too. 📖 Just dropped Series 1: Creational Design Patterns — the 5 patterns that control how objects are born in your code. Written with diagrams, code & zero fluff. Article: https://lnkd.in/gbXJbEhT Code Repo: https://lnkd.in/gpccrayu #Programming #SoftwareArchitecture #DesignPatterns

🚀 Day 24 of 100 Days LeetCode Challenge Problem: Construct Product Matrix Today’s problem is a 2D extension of a classic concept: 👉 “Product of Array Except Self” 🔥 💡 Key Insight: For each cell (i, j), we need: Product of all elements except grid[i][j] Without using division (important!) 🔍 Core Approach: 1️⃣ Flatten the Matrix Treat the matrix like a 1D array 2️⃣ Prefix Product Store product of elements before index 3️⃣ Suffix Product Store product of elements after index 4️⃣ Final Value: p[i][j] = prefix * suffix % 12345 👉 This avoids division and works efficiently 💡 Optimization: Use modulo at every step to prevent overflow Space can be optimized by reusing arrays 🔥 What I Learned Today: Classic problems can appear in different forms (1D → 2D) Prefix & suffix patterns are extremely reusable Avoiding division is a common constraint in interviews 📈 Challenge Progress: Day 24/100 ✅ Almost 25 days strong! LeetCode, Prefix Product, Suffix Product, Matrix, Arrays, Optimization, Modular Arithmetic, DSA Practice, Problem Solving #100DaysOfCode #LeetCode #DSA #CodingChallenge #Matrix #PrefixSum #Optimization #ProblemSolving #TechJourney #ProgrammerLife #SoftwareDeveloper #CodingLife #LearnToCode #Developers #Consistency #GrowthMindset #InterviewPrep

Look at components as real assets, not abstractions. Pages, hooks, and functions are more than just code blocks. They are assets requiring your attention and expertise. Treat them with the respect they deserve and watch your productivity soar. Real builders need this mindset. Shift your perspective on code assets today! #CodeQuality #RealBuilders #SoftwareDevelopment

I could define design patterns… but I couldn’t recognize them in my own code 🤔 Factory, Strategy, Adapter… I knew what they meant. But when it came to real systems, it didn’t always click. That changed when I stopped recalling definitions and started asking: → Am I converting one format into another? 🔌 probably an Adapter → Am I switching behavior based on input without changing the main flow? 🔄 that’s Strategy (sometimes with a Factory deciding which one) → Am I hiding a lot of complexity behind a simple interface? 🧩 that’s a Facade → Am I executing independent tasks/handlers as part of a flow? ⚙️ feels like a Command → Am I storing instances based on keys instead of one global object? 🗂️ closer to a Multiton → Is my flow fixed and controlled in one place? 🧵 more of a Pipeline than a Chain That’s when it clicked: memorizing patterns and actually recognizing them in code are very different things 💡 I’ll be sharing more of these as I keep learning 😄 just small, practical pieces that actually make sense in real systems. What pattern made more sense to you in practice than in theory? #SoftwareEngineering #SystemDesign #DesignPatterns #BackendDevelopment #CodingJourney #LearningInPublic #TechLearning #DeveloperMindset #CleanCode #ProgrammingLife

If you have ideas sitting in your notes for weeks. Not because they were bad, but because building them felt like a completely different skill set. Writing code, debugging, deploying, fixing random errors. That loop kills momentum before you even get started. PrettiFlow is what changes that. You describe what you want, it handles the heavy lifting from building to shipping to iteration. Less time stuck in setup. More time on the parts that actually matter: shaping the idea, designing the experience, talking to users. It is not about replacing builders. It is about removing the friction that slows them down. Big respect to Suhana Rastogi, Amit Dey and Hania Khan for building this. Join here: https://lnkd.in/eiRv_Vry

LeetCode grinding is becoming the new "memorize the textbook." You solve 500 problems. You can reverse a linked list in your sleep. You walk into the on-site. Round 1: System design. You freeze. You've never thought about how Netflix actually serves video to 200 million users. Round 2: Behavioral. "Tell me about a time you disagreed with a teammate." You stare blankly because you spent 6 months alone on LeetCode instead of building anything real. Round 3: LLD. "Design an elevator system." You reach for dynamic programming. It doesn't help. Here's what's actually happening in 2026: Most companies now weigh system design and behavioral rounds EQUAL to or MORE than coding rounds. Some have dropped LeetCode-style rounds entirely. The engineers getting multiple offers right now aren't the ones with 1,000 LC problems solved. They're the ones who can design a system on a whiteboard, explain their trade-offs clearly, and have real stories about building things. LC is not useless. But if it's the only thing you're doing, you're training for the wrong test. What's your split? How much time do you spend on LC vs system design prep? #interviewprep #systemdesign #leetcode #softwareengineering #codinginterview

Have you ever noticed that you might be limiting advanced models by over-guiding them for vibe coding? 🤔 Quick Tip First, build a basic version of your application that covers only the core functionality. At this stage, focus strictly on the essential requirements and avoid unnecessary complexity. You can use any model to create this initial version. Then, give your codebase to Claude 4.7 and ask it to analyze and understand your intent. After that, guide it with something like this: “I’m giving you full freedom to improve this. Make it more performant, more effective, and more engaging. You can add any features or enhancements you want, as long as they serve the original purpose.” At this point, you’ll start seeing highly creative and often unexpected improvements tailored specifically to your project. Finally, keep what you like, remove what you don’t, and refine your application accordingly.

Building Software That Lasts: The SOLID Principles 🚀 Writing code is one thing; maintaining it for years is another. If you want to avoid "spaghetti code" and build scalable projects, the SOLID principles are your best friends. Here is a simple breakdown: 🔹 S – Single Responsibility One class, one job. A policeman shouldn't be your structural engineer. Keep your modules focused to keep them organized. 🔹 O – Open-Closed Your code should be open for extension but closed for modification. You should be able to add a new wheel to a car without cutting the entire body open. 🔹 L – Liskov Substitution Subclasses must be able to replace their parent classes without breaking anything. If a "Lion" eats meat, a "Lion Cub" should too—not suddenly switch to grass. 🔹 I – Interface Segregation Don't force a client to use methods they don't need. If someone just wants a coffee, don’t make them sign a contract for the entire bakery. 🔹 D – Dependency Inversion Depend on abstractions, not concretions. High-level logic shouldn't be "married" to a specific database or language. Stay flexible. 📌 The Takeaway: SOLID isn't just theory; it’s the art of building clean, elastic architecture that survives the test of time. #coding #programming #webdev #softwareengineering #solid #cleancode

I just finished Advent of Code 2023, and it shifted my perspective on what we actually do for a living. In day-to-day "real-world" engineering, we are often plumbers. We construct solutions out of prefabricated parts and are mostly responsible for ensuring the plumbing between them works. It's very top-down and effective, but usually quite formulaic and predictable. Advent of Code gives you the joy of being an inventor again. Advent of Code's problems are usually difficult/impossible to decompose into parts existing libraries can cleanly solve. It forces you to get out of the mindset of a plumber and back into the mindset of an inventor. It really re-captures the joy I felt when I first discovered programming, when everything was new and exciting. If you're looking from a change of pace, I'd highly recommend diving into these puzzles. They ramp you up gradually, with Day 1 being very approachable and days 20-24 being worthy of inclusion in a competitive programming event. My favorite puzzles from this set were Day 20 (a reverse engineering problem), Day 24 (a linear algebra problem) and Day 21 (a geometric pattern extrapolation problem) Check out my solutions here:  https://lnkd.in/eunfq9Hk #AdventOfCode #SoftwareEngineering