Programming Languages & Software Craftsmanship

Next.js 15 App Router architecture diagram with Server Components

Next.js 15 App Router: The Complete Guide to Server Components, Actions & Caching

Next.js 15 is not just another incremental update — it rewrites the mental model for how React applications fetch data, handle mutations, and cache responses. In this deep-dive guide, we'll walk through Server Components, Server Actions, the new Partial Prerendering (PPR) strategy, React's concurrent features, and the overhauled caching primitives that shipped in Next.js 15. By the end, you'll understand when to use each rendering strategy, how to avoid the common pitfalls that trip up even experienced engineers, and how to build apps that are fast by default.

18 min readJul 5, 20264821

TypeScript advanced type system with generics and conditional types

programming

TypeScript Advanced Types: Generics, Conditional Types, Template Literals & the Infer Keyword

Most developers use TypeScript as 'JavaScript with type hints.' But the real power of TypeScript lives in its Turing-complete type system — a meta-language that lets you write logic that runs at compile time, not runtime. In this guide, we explore mapped types, conditional types, template literal types, the infer keyword, and how to build utility types that catch entire categories of bugs before your code ever runs.

20 min readJul 15, 20263940

React performance profiler flame chart and optimization diagram

programming

React Performance Optimization: Memoization, Code Splitting, Virtual Lists & Profiling

A React app that starts fast can become slow as it grows. Unnecessary re-renders, large bundle sizes, and rendering thousands of DOM nodes are the silent killers of React performance. This guide covers the complete toolkit for diagnosing and fixing React performance issues: React.memo, useMemo, useCallback, lazy loading, Suspense boundaries, virtual scrolling with react-window, and profiling with React DevTools.

17 min readAug 10, 20263218

Clean Architecture layer diagram with TypeScript

programming

Clean Architecture in TypeScript: Separating Business Logic from Infrastructure

Your application's business logic should not know about Express routes, PostgreSQL tables, or Redis cache keys. Clean Architecture (by Robert C. Martin) enforces this separation through dependency inversion — the database depends on your business rules, never the other way around. This guide shows how to implement Clean Architecture in TypeScript projects, making your core logic testable without spinning up a database or HTTP server.

18 min readAug 19, 20262512

Published Engineering Guides

Next.js 15 App Router: The Complete Guide to Server Components, Actions & Caching

TypeScript Advanced Types: Generics, Conditional Types, Template Literals & the Infer Keyword

React Performance Optimization: Memoization, Code Splitting, Virtual Lists & Profiling

Clean Architecture in TypeScript: Separating Business Logic from Infrastructure

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