Practical notes on frontend engineering, AWS deployment, CI/CD, product development, and design from the workbench.
Understand AWS Load Balancers from scratch. Learn how ALB and NLB work, why applications need load balancing, and how listeners, target groups, health checks, and traffic routing fit together.
Read featured article →Learn how AWS CloudWatch monitors EC2 instances and applications. Understand metrics, logs, alarms, dashboards, the CloudWatch agent, and troubleshooting with beginner-friendly examples and diagrams.
Read articleLearn how AWS EC2 Auto Scaling works with beginner-friendly examples. Understand Auto Scaling Groups, minimum and desired capacity, scaling policies, launch templates, health checks, and high availability.
Read articleUnderstand AWS Load Balancers from scratch. Learn how ALB and NLB work, why applications need load balancing, and how listeners, target groups, health checks, and traffic routing fit together.
Read articleLearn how AWS VPC route tables work with beginner-friendly examples. Understand local routes, default routes, packet routing, Internet Gateways, NAT Gateways, and why connections fail.
Read articleUnderstand AWS Security Groups and Network ACLs with simple examples. Learn inbound and outbound rules, stateful vs stateless firewalls, rule priority, and how AWS controls network traffic.
Read articleLearn how AWS EC2 networking works, including private and public IP addresses, Elastic IPs, network interfaces, and Security Groups, with beginner-friendly examples.
Read articleUnderstand AWS VPC networking from the beginning. Learn how IP addresses, CIDR blocks, subnets, route tables, Internet Gateways, and NAT Gateways work together, with clear examples.
Read articleLearn how optimistic UI works in React, how the useOptimistic Hook simplifies temporary form updates, and how to handle success, failure, and real server state correctly.
Read articleLearn how React 19's use() API lets components read Promises and Context directly during render. This practical guide explains how it works with Suspense, data fetching, Context, and real-world use cases.
Read articleLearn how React 19's useFormStatus hook helps you track form submission state inside child components, disable buttons, show loading indicators, and build reusable form UI without passing pending state through props.
Read articleLearn how React 19's useActionState hook simplifies form submissions, async actions, loading states, validation errors, and server mutations with practical examples you can test yourself.
Read articleLearn how to design and build a scalable notification system using Node.js, PostgreSQL, Redis, BullMQ, queues, retries, workers, email, SMS, push notifications, and in-app notifications. Every step includes implementation and local testing so you can simulate the complete system yourself.
Read articleLearn how to design a scalable URL shortener like Bitly by exploring requirements, API design, database structure, caching, short-code generation, redirection, scalability, and system architecture.
Read articleLearn the fundamentals of system design by understanding how users, web applications, load balancers, API gateways, backend services, caches, message queues, and databases work together to build scalable applications.
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