Radu Catalin-Andrei’s Post

We gave developers an SDK. They didn't use it. We gave them clean API docs. They still didn't use it. Not because the product was bad, but because developers are busy, and "two API calls" still means opening a file, reading docs, writing code, and wiring it into a form. That's friction. Real friction. So we asked ourselves: what's the laziest possible way a developer should be able to add multi-tenant file uploads to their app? The answer was obvious once we said it out loud. Copy a component. Drop it in your form. Done. We're building ready-made upload components for React, Next.js, Nuxt, and Vue. You copy the component, drop it where your file input lives, pass your tenant ID, and your files are isolated, quota-enforced, and tracked in Tenantbox storage without writing a single line of upload logic. No SDK to install. No docs to read. No presigned URL logic to understand. Just a component that works. I came to realize that this is what building in public actually means you ship something, watch how real users interact with it, and rebuild the experience around how they actually behave, not how you assumed they would. If you're a developer building a SaaS product with file uploads on the roadmap, the components are coming soon and they will save you a week of work, you can bet on that!

Most developers “know” GraphQL… but very few can actually use it effectively in real-world frontend apps. I’ve decided to fix that — starting now. Over the next few days, I’m going back to basics and rebuilding my understanding of GraphQL from the ground up, with one clear goal: 👉 Apply it properly in a Next.js frontend. Here’s what I’ll be focusing on: • Understanding core GraphQL concepts (queries, mutations, schemas) — not just syntax, but why they matter • Replacing REST thinking with GraphQL thinking • Integrating GraphQL into a Next.js app (App Router + modern patterns) • Managing data fetching efficiently (no over-fetching, no under-fetching) • Exploring tools like Apollo Client / urql and when to use each I’m not aiming to “learn another tool.” I’m aiming to build better data-driven frontends. If you’ve been putting off GraphQL or only scratched the surface, feel free to join me on this journey. I’ll be sharing what actually works (and what doesn’t). Let’s stop consuming tutorials and start building with intent. #GraphQL #NextJS #FrontendDevelopment #WebDevelopment #LearningInPublic

Most developers can build features. Few can build systems that don’t break in production. Here’s what changes everything In real-world apps: - APIs fail - Users spam actions - Payments get duplicated - Data goes out of sync -> Clean code is NOT enough. You need: - Error handling strategy - Idempotency - Logging & monitoring - Defensive backend logic If you’re not thinking about edge cases, you’re still in “tutorial mode”. Real dev starts when things break. #backend #webdevelopment #softwareengineering #nodejs

HOW I STRUCTURE SCALABLE APPS IN NEXT.js Most developers don’t have a scaling problem. They have a structure problem. I’ve seen “slow” apps magically become fast… just by fixing how the codebase was organized. Here’s how I structure scalable apps in Next.js after building real production systems: 1. I don’t start with pages — I start with features Instead of dumping everything into /components, I group by domain: /features/auth /features/dashboard /features/payments Each feature contains: UI components hooks services (API calls) types This keeps logic close to where it’s used and prevents chaos as the app grows. 2. I separate server and client responsibilities early With modern Next.js, this is non-negotiable. Server: data fetching, heavy logic Client: interactivity, state, UI behavior If everything becomes a client component, your performance is already gone. 3. I centralize API logic (no scattered fetch calls) I never fetch directly inside random components. Instead: /lib/api → base config /features/*/services → feature-specific calls This makes it easier to: swap APIs handle errors globally add caching later 4. I design layouts like a system, not a page Layouts are not just wrappers. I use them to: control access (auth, roles) share UI (navbars, sidebars) manage page structure consistency Bad layout structure = duplicated logic everywhere. 5. I keep components “dumb” and predictable My rule: If a component is hard to reuse, it’s badly designed. UI components → pure + reusable Logic → extracted into hooks/services 6. I optimize for growth, not just today Early decisions that save you later: clear folder structure consistent naming strict typing modular features Because rewriting structure at scale is painful. 7. I treat performance as architecture, not a fix Things I bake in from the start: server components where possible lazy loading for heavy UI minimal client-side state proper caching strategy Performance is not something you “add later.” After working on multiple real-world products, one thing is clear: Clean structure scales. Mess doesn’t. You don’t need more libraries. You need better decisions. If you’re building with Next.js, what’s one structure mistake you’ve made before? Let’s talk 👇 #frontenddev #nextjs #webdeveloper

I’m excited to share my latest project—a comprehensive, end-to-end food delivery platform called Claude-Kitchen. This wasn’t just about building a pretty interface,it was about managing complex state, securing payments, and creating a seamless flow between customers and business owners. The Tech Stack Frontend: React.js for a dynamic, responsive user experience. Backend: Node.js & Express.js for a robust RESTful API. Database: MongoDB for flexible, scalable data management. Payments: Stripe API integration for secure, real-time transactions. Key Features Customer App: Intuitive menu browsing, real-time cart updates, and a secure multi-step checkout process. Admin Dashboard: A dedicated portal to manage the menu—add/remove items, update pricing, and track orders in real-time. Secure Authentication: User login and persistent sessions to keep customer data safe. State Management: Handled complex UI logic to ensure a bug-free ordering experience. What I Learned Building this project pushed me to think like a product owner. I focused heavily on UX/UI best practices, ensuring the transition from "Add to Cart" to "Payment Successful" was as smooth as possible. Tackling the Stripe integration also deepened my understanding of handling webhooks and sensitive financial data. Check out the demo below! #MERNStack #WebDevelopment #ReactJS #FullStack #Stripe #Coding

"Full-stack TypeScript with tRPC is the new gold standard for building scalable web apps. Many teams are still catching up." 1. Embrace type safety across your entire stack. With tRPC, you get TypeScript's strong type-checking from front to back, minimizing runtime errors dramatically. 2. Optimize your API development process. With tRPC, there's no need to manually maintain API contracts—TypeScript handles it for you. 3. Build faster with real-time TypeScript feedback. As you code, get instant insights from your IDE, reducing debugging time significantly. 4. Experiment with vibe coding to quickly prototype your endpoints. I've had a working demo ready in just 20 minutes thanks to this approach. 5. Streamline your codebase with shared types. tRPC lets you define and use the same types across client and server seamlessly. 6. Scale your applications confidently. Enjoy the peace of mind that comes with knowing your end-to-end types are solid and reliable. 7. Integrate AI-assisted development to boost your velocity. I've noticed a tangible speed-up in converting ideas to features. Here's a quick TypeScript example to illustrate: ```typescript const createContext =

🚀 From Managing State to Engineering Scalable Mobile Systems When I started building apps in React Native, most of my focus was on UI, navigation, and basic API integration. But as I worked on more production-level applications, I realized something critical: 👉 The real challenge is not fetching data… 👉 It’s managing server state efficiently at scale. That’s where TanStack Query completely changed my approach. Instead of writing repetitive logic for: • API calls • Caching • Loading & error states • Retry mechanisms • Data synchronization I started thinking in terms of server-state architecture. 💡 What changed for me: • Clean separation between client state & server state • Automatic caching → faster apps, fewer API calls • Background updates → always fresh data without manual effort • Resilient apps → handles poor network & failures gracefully • Better UX → with optimistic updates and instant feedback ⚡ The impact: I moved from “just building features” → to engineering scalable, production-ready mobile systems And that’s the shift every serious developer should aim for. --- 📱 Currently, I’m focused on: • Building high-performance React Native applications • Designing scalable frontend architecture • Secure API integration (JWT, interceptors, retry flows) • Handling real-world edge cases (offline mode, failures, recovery) #ReactNative #JavaScript #TanStackQuery #SystemDesign #MobileArchitecture #SoftwareEngineering #Developer

Why most web applications slow down after 6 months — and how to prevent it. Not because of bad developers. Because of decisions that made sense at the start but weren't built to scale. After 8+ years building full-stack systems, here's what I see breaking production apps repeatedly: ❌ No separation between business logic and framework code When Laravel controllers hold everything, one requirement change breaks three features. ❌ Database queries written for convenience, not performance N+1 problems don't show up in development. They show up when 10,000 users hit your app at once. ❌ Frontend state managed as an afterthought React and Vue.js are powerful — but unstructured state management turns a fast app into an unmaintainable one fast. ❌ Payment flows with no failure handling Stripe and PayPal will fail. Webhooks will retry. If your system isn't idempotent, you will charge customers twice. ❌ No CI/CD means every deployment is a gamble Manual deploys on AWS or GCP introduce human error at the worst possible moment. The fix isn't always a rewrite. It's engineering discipline applied early. This is what separates systems that survive growth from ones that collapse under it. What's the biggest technical debt issue you've faced in a production system? Drop it in the comments 👇 #SoftwareEngineering #FullStackDevelopment #Laravel #React #WebDevelopment #BackendDevelopment #TechLeadership #PHP #AWS

Day 4 - Global State Management Systems How do you manage the state of your application? 🤔 As applications grow, handling state efficiently becomes very important for performance and scalability. Here are some popular approaches 👇 📌 Redux – Powerful and widely used, great for large-scale apps 📌 Context API – Simple and built into React, best for smaller use cases 📌 Apollo Client – Modern solution that works seamlessly with GraphQL and also helps in managing both remote & local state 💡 Key Insight: Choosing the right state management depends on your app complexity and data flow. 👉 In the next post, I’ll go deeper into Apollo Client and how it simplifies state management with real examples. #Day4 #StateManagement #Redux #ApolloClient #ReactJS #WebDevelopment #Frontend #Developers #Tech #LearningInPublic

🚀 Exploring the Power of REST APIs Diving into the world of REST APIs has been a game-changer in my backend journey! From understanding HTTP methods like GET, POST, PUT, DELETE to building scalable and efficient communication between client and server — it's all about simplicity and performance. REST APIs follow a stateless architecture, making them lightweight, flexible, and easy to integrate with modern applications. Whether you're building web apps or mobile apps, mastering REST is a must-have skill for every developer. 💡 Key Takeaways: ✔ Stateless communication ✔ Resource-based architecture ✔ Uses standard HTTP methods ✔ Scalable and easy to maintain Still learning, still growing — one API at a time! 🔥 #BackendDevelopment #RESTAPI #WebDevelopment #NodeJS #LearningJourney #Developers