8 min read Full-text search is a core feature of most applications — from e-commerce product search to log analysis to knowledge base […] Read article
6 min read Capacity planning and back-of-envelope estimation are essential skills for system design interviews. Every design decision — whether to use a Read article
7 min read Data serialization determines how structured data is encoded for storage and transmission. The choice between JSON, Protocol Buffers, Avro, and Read article
8 min read Probabilistic data structures trade perfect accuracy for dramatic space savings. A Bloom filter can test membership in a set of Read article
8 min read Concurrency questions test your understanding of parallel execution, synchronization, and the subtle bugs that arise when multiple threads share state. Read article
8 min read Continuous Integration and Continuous Delivery (CI/CD) pipelines automate the path from code commit to production deployment. A well-designed CI/CD pipeline Read article
9 min read Web security is a core competency for every backend and full-stack engineer. Security vulnerabilities are consistently the most expensive bugs Read article
9 min read Message queues are the backbone of asynchronous communication in distributed systems. Choosing the right message queue and understanding its guarantees Read article
9 min read Understanding network protocols is fundamental to designing performant distributed systems. Every API call, database query, and cache lookup traverses the Read article
8 min read Generating unique identifiers in a distributed system is a surprisingly complex problem. A simple auto-incrementing integer does not work when Read article
9 min read Containers are the building blocks of modern cloud-native applications. Understanding how Docker works internally — Linux namespaces, cgroups, layered filesystems, Read article
9 min read SQL query optimization is a critical skill for backend engineers and appears frequently in database-focused interviews. Understanding how the query Read article
9 min read Load balancers distribute incoming traffic across multiple servers to ensure no single server becomes a bottleneck. They are a fundamental Read article
9 min read Object-oriented design questions test your ability to model real-world systems using classes, interfaces, and design patterns. These questions appear frequently Read article
10 min read Caching is the single most impactful performance optimization in distributed systems. A well-designed caching layer can reduce database load by Read article
