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 …
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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…
Most developers think an API Gateway is just a reverse proxy.
It's much more than that. An API Gateway sits between clients and your backend services, acting as a single entry point for your entire system. Client…
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…
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-…
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…
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…
Kafka в проде: как встроенное сжатие спасло кластер, когда retention не успевал чистить диск
Привет, Хабр! Меня зовут Павел, я ведущий разработчик. В этой статье расскажу про Kafka, consumer groups, lag, offset commit и встроенное сжатие сообщ…
Building a Metadata-Driven Runtime API Platform for Analytics Systems
Building a Metadata-Driven Runtime API Platform for Analytics Systems 1. Business Problem When I joined this project as a consultant, I almost said no…
Real-Time Notification Systems Are Harder Than Most Teams Expect
If you’ve ever thought, “It’s just a WebSocket event,” this article is for you. Notification systems look simple on the surface, but in production the…
The Hidden Machinery Behind Background Jobs
This will be a boring article today, but I wanted to write it after talking to a developer who genuinely believed background jobs are the key to faste…
Defend External APIs: Redis Token Bucket in Laravel
The Silent Vendor Ban Danger When architecting a high-performance B2B SaaS platform at Smart Tech Devs, your system frequently depends on external thi…
Classes, Enums, and Records Look Like Simple Language Features — Until You Realize They Define Your Entire Domain Model
Classes, Enums, and Records Look Like Simple Language Features — Until You Realize They Define Your Entire Domain Model Why Senior .NET Engineers Spen…
Error Handling in Node.js: Beyond Try/Catch (2026)
Error Handling in Node.js: Beyond Try/Catch (2026) Try/catch is just the beginning. Real-world error handling is about resilience, observability, and …
32/60 Days System Design Questions!
Your startup just got its first SOC 2 audit. The auditor asks: "Where are your database passwords, API keys, and service tokens stored?" Your senior e…
Beyond CRUD: 9 Backend Concepts Every Engineer Should Know to Build Scalable and Reliable Systems
When I started learning backend development, I thought the job was pretty straightforward. Build an API. Connect a database. Add authentication. Deplo…
Architecting Strict Sequential Ordering in a Concurrent World
Imagine you are building a cloud-native backend for a high-frequency trading platform or a core banking ledger. To ensure mathematical immutability an…
API Design for High-Throughput Systems: Rate Limiting, Versioning, Idempotency
Originally published at spectredev.xyz . Cross-posted here for the Dev.to community. Building APIs that hold up under real traffic takes more than fas…
Building a Real‑Time Notification System: Why a Simple Token Bucket Beats Fancy Alternatives
Building a Real‑Time Notification System: Why a Simple Token Bucket Beats Fancy Alternatives Quick context (why you're writing this) Honestly, I still…