Systems Design & Architecture

A real-world Rust performance story about heap allocation, small arrays, CPU cache, and why insertion sort sometimes beats a default sort.

Your team just shipped "offline mode" for your field-service app. Technicians work in basements,...

When you build a marketplace that connects two sides, manufacturers on one side and distributors on...

In the previous post, I wrote about RESP — the protocol layer that lets a Redis server understand...

Durante mucho tiempo asocié el desarrollo de software con programar funcionalidades: crear entidades,...

Sit in the protocol's seat during an incident. The job is clear and brutal: pause the contracts,...

The Three‑File Architecture The Foundation of the Entire System 1....

Step-by-step guide to wiring Sanity CMS role-based access control with document-level permissions in a Next.js project. Covers custom roles, GROQ filters, and S

A founder asked me last year to review the architecture his agency had pitched. Eleven services. A...

Our workflow engine is designed to be more than just a pre-defined set of nodes. We recognize that...

By Faiz Ullah — Android Developer & Founder of DG Technology A wallpaper app sounds simple:...

Stop Spatially Disoriented Traces: Mapping JEP 480 Structured Concurrency Topologies in...

Go's Type System — Structs, Interfaces, and Life Without Inheritance In part 1 of this...

Series context: This is Part 7 of the E-commerce Order Allocation series. The distance matrix built...

Users hit "ChunkLoadError: Loading chunk failed" after you deploy. It is a version-skew problem, not a code bug. Here are the real causes and the official Next.

My first on-call rotation was a chaotic experience that taught me the value of documentation in system design. I learned more about it in one week than in years

I started wanting to write Haskell in TypeScript and ended up with three helpers and a lesson. An honest breakdown of which functional patterns survive in a rea

At first, age calculation looks like one of the easiest problems in programming. You take today’s...

Every non-trivial business operation touches more than one system. An e-commerce order reserves...

There are basically 2 types of architectures in software development: Microservice...

How I built SnapShelf, an always-on-top staging shelf for Windows, and the WebView2, OLE drag-and-drop, and MSIX rabbit holes I fell into along the way.

Until now, you picked a programming language based on what you knew, what your team knew, or what the...

A founder told me last year: "We need admin features shipped by Friday. Can we just hardcode the...

If you play D&D or tabletop RPGs, you know the map problem: either you spend hours drawing maps...

The Problem: Pushing Instant Notifications to Millions of Devices Answer-first: Uber's...

By RUGERO Tesla (@404Saint). Industrial protocols always felt like an intentional black box to...

What Are the Career Opportunities in SAP ABAP RAP? Introduction Many SAP professionals are looking...

Every architecture conversation starts the same way. Someone asks "what if we need to scale?" and...

Geospatial Indexing: How Uber Finds the Nearest Driver Among Millions in...

Stop modeling API responses with nullable fields and boolean flags. Discriminated unions turn runtime errors into compile-time guarantees.

When I first started building signal-kernel, I thought I was simply writing a signal library—a...

I Built a B-Tree in Pure Python and Finally Understood Why Postgres Uses It for Every...

Temporal has emerged as a powerful workflow orchestration engine that helps developers build...

This is Part 3 of my series building Loom. 👉 Missed Part 2? Read it here Today: Building the...

TimingLyzer Static timing analysis visualizer. A static timing analysis visualizer built...

Go Bulkhead Pattern — Complete Reference Table of Contents What is the...

As applications grow, one of the biggest architectural decisions is whether to keep everything in a...

Many developers learn programming by focusing on functions, classes, frameworks, and algorithms....

The problem I kept running into Every time I practiced system design, I'd hit the same...

Introduction If you have been building applications using Vite and standard React for the...

In System Design, there is rarely a "perfect" solution. Every architecture decision involves...

I Built a Consistent Hashing Ring in Pure Python and Finally Understood How Cassandra...

When I started building Levelo JS, one of the most interesting challenges was creating a reactive...

I learned this the annoying way: admin panels are not configuration systems. They can become one,...

When you store data in a distributed system, you face a fundamental choice. Do you require that all...

Java wildcards map to TypeScript's structural typing in ways that surprise JVM developers. Here is what extends and super become, and the new in/out keywords.

Embedding promotes methods, it does not give you inheritance. Here is where the method-set rules and accidental interfaces bite Go developers.

Introdução Classes abstratas são contratos parcialmente implementados. Você define o que...