Stop Writing Boilerplate API Responses: Meet BaR-js
We've all been there: you’re building an endpoint, and for the hundredth time, you’re typing out res.status(200).json({ success: true, data: ... }) . …
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Indexing: The Force Awakens in My Rate Limiter Quest
The Quest Begins (The "Why") Ever had one of those days where your API feels like it’s stuck in quicksand? I was building a simple rate‑limiter for a …
UUID vs ULID vs NanoID: Which Identifier Should You Use in 2026?
A few years ago, choosing an ID format was easy. Most of us generated a UUID, stored it in the database, and moved on. Today things are different. Mod…
Event-Driven Architecture: Uncle Explains Like You're Five 👦👨🦳
A conversation between Uncle (a backend architect) and Nephew (a curious developer) about events, publishers, subscribers, Redis Pub/Sub, RabbitMQ, an…
Not Every Lint Warning Is Cosmetic
How old tools improve the work of new (non)humans. I noticed this pattern while working through a series of backend cleanup tasks in pylint , flake8 ,…
I Built a Consistent Hashing Ring in Pure Python and Finally Understood How Cassandra Distributes Data
I Built a Consistent Hashing Ring in Pure Python and Finally Understood How Cassandra Distributes Data I've been using Cassandra and Redis Cluster for…
Admin Panels Are Not Configuration Systems
I learned this the annoying way: admin panels are not configuration systems. They can become one, but not by accident. Early on, it feels harmless. So…
Securing Financial APIs in 2026: Implementing Global Request Interceptors and Automated Audit Trails in Spring Boot
With the recent surge in security vulnerabilities across the Spring ecosystem in the first half of 2026, relying on scattered security validation insi…
Struct Embedding in Go: Composition That Bites When You Reach for Inheritance
Book: The Complete Guide to Go Programming Also by me: Thinking in Go (2-book series) — Complete Guide to Go Programming + Hexagonal Architecture in G…
Translate Infrastructure Errors at the Adapter, Not in Your Domain
Book: Decoupled PHP — Clean and Hexagonal Architecture for Applications That Outlive the Framework Also by me: Thinking in Go (2-book series) — Comple…
A Meal Planner & Grocery Shopping Agent in Typescript with HazelJS
In this post, we'll build a practical AI-powered meal planning agent using HazelJS. This agent helps users create personalized meal plans, discover re…
Beyond the Happy Path: Lessons in Resilience and Distributed State
Reflecting on two major technical challenges from my backend engineering internship, focusing on fault tolerance, infrastructure, and distributed arch…
Encrypt your .env with AWS KMS: Secrets that never touch process.env
A year ago I'd have told you a .env file was fine. Then we patched a CVSS 10.0 RCE in Next.js ( CVE-2025-66478 ) and spent the next two days rotating …
When you just need to inspect a webhook before writing code
Webhooks are usually discussed as something your application should process automatically. A payment provider sends an event. A Git hosting service no…
FastAPI for AI Engineers - Part 5: Authentication vs Authorization (And Why Most Beginners Confuse Them)
In the previous article, we explored how Pydantic validates data before it enters our application. For example, if an API expects a temperature value,…
Не давайте ИИ-агенту прямой доступ к базе. Как я проектировал безопасный контур действий на FastAPI и PostgreSQL
Последнее время я всё чаще встречаю одну и ту же мысль: бизнес никогда не даст ИИ‑агенту доступ к базе клиентов, заявкам, платежам, CRM…
Prevent Cache Stampedes: Atomic Locks in Laravel 🛡️
The Cache Stampede Avalanche When engineering high-traffic applications at Smart Tech Devs, caching heavy database responses is your first line of def…
Event-Driven Algos: Mastering Webhooks and Order Lifecycle Event Triggers
In our previous article, we tackled low-latency data ingestion by architecting high-performance WebSocket streaming clients. Sockets are perfect for c…
The Freebuff Paradox: Elite Code Critic, Terrible Laravel Programmer
When you're building a complex backend system—like an enterprise-grade Point of Sales (POS) API using Laravel with a Modular Monolith architecture and…
REST API Design: Building APIs That Developers Love (2026)
REST API Design: Building APIs That Developers Love (2026) A great API is one that developers enjoy using. It's intuitive, consistent, well-documented…
System Design - 13. Message Queues Explained: Why LinkedIn Built Kafka and Changed Async Communication Forever
Message Queues Explained: Why LinkedIn Built Kafka and Changed Async Communication Forever Covers: Point-to-Point vs Pub-Sub, Kafka Internals, Deliver…
Building Adal: predictable webhook delivery without black boxes
Hi DEV community, I'm Yuriy, a fullstack developer and DevOps engineer with 10+ years of experience. I'm currently building Adal — a webhook delivery …
How Database Inserts Work: WAL and Buffer Pools
Quick Answer: When you insert data into a database, it doesn't immediately write to the main data table on disk. Instead, it caches the data in a RAM-…
Day 35/60 System Design Questions
This article was written with the assistance of AI tooling for structure and syntax. The concepts, tradeoffs, and production context are based on my o…
I Built My Own API Gateway in Rust — Here's What I Learned
Every backend project I've worked on eventually hits the same wall. You start clean — one service, simple routes, everything works. Then slowly the re…
Inngest + Next.js: The Complete Guide (2026)
Serverless functions have a time limit. Vercel gives you 60 seconds on Pro. None of that is enough to send a welcome email sequence, process an upload…
Integrating Payments in Indonesia: Midtrans vs Xendit (and When to Pick Which)
If you're shipping anything that takes money in Indonesia, two names come up before all others: Midtrans and Xendit. They're both solid, both support …
Why I Stopped Using reset() and end() in PHP (And What I Use Now)
If you have been writing PHP for a year or two, you have almost certainly written something like this: $items = getFilteredOrders (); $first = reset (…
Debugging and Eliminating Invisible Memory Leaks in Node.js Event Loops
When building microservices or background worker processes that are meant to run continuously for months at a time, memory management becomes critical…
Stop Fake Webhooks: Master HMAC Signatures in Laravel 🛡️
The Webhook Spoofing Vulnerability When engineering a B2B SaaS platform at Smart Tech Devs, relying on external services like Stripe, Shopify, or GitH…