A Flutter application can be functionally correct and still feel slow. You might notice: These problems are commonly described as jank. However, not all jank has the same cause. Two important categories Flutter developers should understand are: UI jank and raster jank. At a high level: Understanding the difference matters because optimizing the wrong part […]
Streams are one of the most important asynchronous programming concepts in Dart. While a Future produces a single asynchronous result, a Stream can deliver multiple values over time. For example: Whereas: Streams are commonly used in Flutter and Dart for: However, not every Dart stream behaves the same way. Two important types are: Single-subscription streams […]
Navigation is a fundamental part of almost every Flutter application. Even a relatively small app usually needs to move between screens such as: Flutter provides the built-in Navigator API for managing navigation. However, as applications become larger and require deep linking, authentication redirects, nested navigation, or web URL support, manually managing routes can become increasingly […]
Most Flutter applications are built around a simple assumption: The internet is available. A typical application works like this: This architecture works until the user’s network becomes slow, unstable, or completely unavailable. Then the application starts showing: An offline-first architecture approaches the problem differently. Instead of treating local storage as a temporary backup, the application […]
Most Flutter applications depend on APIs to load products, profiles, posts, categories, settings, dashboards, or other dynamic data. Calling the server every time a screen opens works, but it can create several problems: API caching solves many of these problems by temporarily storing previously fetched data and reusing it when appropriate. A well-designed Flutter application […]
Software as a Service (SaaS) applications often serve many organizations from a single application. For example, imagine a project-management platform used by: All of these organizations use the same application, but their users, projects, billing information, and business data must remain isolated. This architecture is known as multi-tenancy. Designing a multi-tenant SaaS application requires more […]
Most modern Flutter applications use token-based authentication to communicate securely with backend APIs. After a user logs in, the server commonly returns two tokens: The problem is that access tokens eventually expire. If your Flutter app does not handle expiration correctly, users may suddenly receive 401 Unauthorized errors and be forced to log in again. […]
When building a small Flutter application, you might use a single Dart class to represent data everywhere in the app. That approach can work perfectly well at first. However, as the application grows and starts using REST APIs, Firebase, Supabase, local databases, caching, repositories, and Clean Architecture, using the same class everywhere can create unnecessary […]
When building backend applications with Node.js and MongoDB, many operations involve more than one database write. For example, imagine an e-commerce application where placing an order requires you to: What happens if the order is created successfully but updating the inventory fails? You could end up with inconsistent data. This is where MongoDB transactions become […]
Page 34 of 109