Interesting case Studies
How Duolingo Saved Millions in AWS Cloud Costs How Canva Saved Millions in AWS S3 Costs Resources
Puneet Verma
Exploring the Power of AWS
Amazon Web Services (AWS) has revolutionised the way developers build, deploy, and scale applications. Whether you’re a startup building your MVP or an enterprise running mission-critical systems, AWS offers powerful services to meet every need. Among its vast suite of cloud offerings, Amazon EC2, AWS Lambda, Amazon S3, and Amazon DynamoDB stand out as foundational … Read more
Mastering Low-Level Design (LLD): A Step-by-Step Guide
Low-Level Design (LLD) plays a critical role in software engineering. It transforms high-level requirements into detailed class structures, object interactions, and method signatures. Whether you’re preparing for system design interviews or working on real-world applications, understanding how to approach LLD effectively can set you apart. Topics to Master To tackle LLD problems confidently, make sure … Read more
LLD Parking Lot
Designing a Parking Lot System involves the use of various design patterns to structure the system in a way that is flexible, scalable, and easy to maintain. In this case, the Parking Lot System is built to manage parking spots, vehicles, parking tickets, and payment modes. Requirment 1 Solution Identify key objects/classes in the system. … Read more
Class Diagram: A Complete Guide
Class Diagram is widely used in object-oriented programming to visualize and design the structure of software systems before writing any code. What is a Class Diagram? A Class Diagram is a type of static structure diagram in the Unified Modeling Language (UML) that describes the structure of a system by showing its classes, attributes, methods, … Read more
Good Code Practices
Exception Bad Practice Recommended (Good Practice) Way 1 Way 2 Catching a too general Exception is generally considered a bad practice because: Idea Doc String format
API Authentication: A Complete Guide
APIs are the backbone of modern web and mobile applications. But with great power comes great responsibility — especially when it comes to securing your APIs. That’s where authentication comes in. What is API Authentication? API authentication is the process of verifying the identity of the client or user who is trying to access an … Read more
Understanding Cross-Site Scripting (XSS)
Cross-Site Scripting (XSS) is one of the most common and dangerous security vulnerabilities found in web applications. It allows attackers to inject malicious scripts into otherwise benign and trusted websites. When unsuspecting users visit these sites, the malicious scripts execute in their browsers, potentially compromising sensitive data or hijacking user sessions. What is XSS? XSS … Read more
A Complete Guide to GraphQL for Backend Developers
GraphQL is a query language and runtime for APIs developed by Facebook in 2012 and open-sourced in 2015. It provides a more efficient, flexible, and powerful alternative to REST. Instead of multiple endpoints, clients access all data through a single endpoint and explicitly define what data they need. This article offers a complete overview of … Read more
Understanding gRPC: A Modern Framework for High-Performance Communication
In an era where microservices dominate modern application architecture, efficient communication between services is more important than ever. gRPC, short for google Remote Procedure Call, is a high-performance, open-source universal RPC framework developed by Google. It facilitates client-server communication with features that make it ideal for building distributed systems. What is gRPC? gRPC is a … Read more