Backend Engineering

I used to think that adding a "paste image" feature to an upload component would be a one-liner. But...

If you’re not a medium member, you can read the full article by clicking on this link : version-for-non-member Continue reading on Medium »

A number-by-number tour of TCP/UDP ports from 0 to 65535 — why the range is split into three tiers, why so many numbers look empty, and the real stories behind

Hello Dev Community! 👋 It is officially Day 97 of my 100-day backend and frontend engineering...

A complete guide to Unix timestamps: convert seconds/milliseconds, handle timezones, common pitfalls, and one-liners for JavaScript, Python, SQL, Go, Rust, and

A practical Node.js drill for backend developers to practice production incident interview questions: detect, scope, hypothesize, test, and mitigate.

Prepare to be befuddled and bamboozled – and probably bewitched

These methods look simple, but they frequently expose gaps in understanding quantifiers, domain intent, and edge cases — especially empty… Continue reading on M

Construction builds the object. Destruction is where leaks happen — and interviews love asking why. Continue reading on Medium »

Part 2 of 2 — Why They Killed It (And Not for the Reason You Think) Continue reading on Heap & Wire »

TL;DR A gate check-in app can't depend on live Wi-Fi: scans must work offline and sync...

If you've changed a value in .env and your app keeps using the old one, this is your bug. TL;DR:...

Laravel 12 User Roles and Permissions: A Practical Guide to Building Secure Applications Continue reading on Medium »

When you type node app.js into your terminal, a complex symphony of C++, C, and JavaScript fires up. For years, the Node.js community has… Continue reading on M

One of the things I appreciate most about being at Zone01 Kisumu is the culture of continuous...

Setiap project punya kebutuhan berbeda, dan salah satu pendekatan struktur kode yang cukup fleksibel menurut saya adalah Layered… Continue reading on Medium »

Today, I attended a brilliant backend mini-conference. As someone who is relatively new to the...

The most common frontend authorization mistake isn't showing a button to the wrong user. It's...

Most Node.js apps can handle more than you think. Here's how to squeeze out real performance gains. Quick Wins First 1. Enable Compression...

Building a Real-Time Chat Application with WebSockets and Node.js Real-time communication...

Build a dependency-free Node.js CLI that turns any job description into technical questions, behavioral prompts, risk areas, and a 7-day interview practice plan

When you google "how to build a chat app in Node.js," the very first result will almost certainly...

Ever pasted a Base64 string into atob() and gotten this? Uncaught DOMException: Failed to execute...

When I first started learning programming, I hated debugging. Continue reading on Medium »

Keep HTTP status codes out of your Go domain. Typed sentinel errors, errors.As, and one translation function at the handler edge.

Somewhere in most event-driven backends, there's a method that looks like this: async...

Every Go developer has written WHERE 1=1 with string concatenation for dynamic filters. sqlc can't do dynamic queries. sqlx is abandoned. GORM hides the SQL. He

TL;DR You can record outgoing mail — sent, delivered-ish, opened, clicked — using...

Para tener un ORM tipado con migraciones automáticas en Python necesitás mantener 3 fuentes de...

The one-click gap nobody was solving: why I built HTML Deployer A few months ago I watched...

When people start programming, they often choose a path — frontend, backend, AI, mobile development, or data science. While specialization… Continue reading on

Apache Kafka has become the de facto standard for real-time data streaming and event-driven architectures. But simply adopting Kafka isn’t… Continue reading on

Two gates, two jobs: constraints check the shape of input, invariants guard the domain. Stop duplicating the same truth in both.

Status como string espalhada pelo código é bug esperando pra acontecer. Veja como Enums do PHP 8.1 e o cast do Eloquent resolvem isso de vez.

If you build backend systems, you probably test your APIs locally using standard .http files right...

Almost every tutorial on connection pooling stops at the same place. “A connection pool reuses database connections instead of opening a… Continue reading on Me

You've probably written a CommandExecutor before. Everyone who's touched Bukkit has. Declare the...

Opening a 600-line Solidity contract you have never seen is intimidating. Where do you even start?...

What is a Variable? A variable is a named container used to store data in a program. The...

I've been learning backend development and built this project to practice real production...

In the previous article, we learned how to use for loops and conditions inside loops. Continue reading on Medium »

TL;DR Public Livewire tables package: extracted a theme-class seam so Blades stop...

I’ve always thought building a mobile app required climbing a massive learning curve just to get a...

Vibe coding can ship a feature in twenty minutes or leave you debugging hallucinations for three hours — the difference is discipline, not… Continue reading on

I built my first MCP server last week and it was way simpler than I expected. Here is exactly how, no...

Day 2: Understanding HTTP, HTTPS & How Browsers Actually Talk to Servers Continue reading on Medium »

Here’s the setup that makes it actually worth the learning curve. Continue reading on Medium »

For years I copied cron expressions off Stack Overflow, pasted them into a config file, crossed my...