Building Dhrishti - Part 3: Testing on a Production Grade System
I was now done with the basic setup. However, during my time working at my startup, I have learnt to think about a project wearing multiple caps. One …
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Redis's Event-Driven Architecture and the ae Event Loop
One of the most common questions about Redis is: "Redis is single-threaded, so how can it handle thousands of concurrent connections?". But the more i…
When Kubernetes Isn't the Problem: Debugging External Dependencies in AKS
Introduction One of the most common mistakes during incident response is assuming Kubernetes is the problem simply because the application runs on Kub…
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…
Mitigating Race Conditions in Distributed Inventory Ledgers
When building a system that tracks highly volatile, mutable data across multiple distinct endpoints, data integrity becomes your highest priority. If …
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…
Как мы автоматизировали отдел продаж в Bitrix24 с помощью ИИ
Привет! Я Влад Вандер, контент-маркетолог в Velmi. Ребята из команды рассказали мне, как автоматизировали отдел продаж и научили ИИ-бота квалифицирова…
We Replaced Redis with MySQL SKIP LOCKED for Inventory Reservation — Oversells Went to Zero
For two years, our Sponsored Placements service booked limited ad inventory through Redis: a counter in Redis, a Redlock around the decrement, and a T…
Under the Hood: Redis Enterprise Cluster
Welcome to another post in the "Under the Hood" series. The power of Redis lies in its simplicity. One thread, one event loop, zero locks . Single-thr…
How to Build a PostgreSQL Backed Job Queue in Go
When you build a web application, not every task should happen inside the user's request. Some work is slow. Some work can fail. Some work should happ…
Session Management, Rate Limiting & Caching using Redis
Modern distributed systems — whether fintech APIs, e-commerce platforms, or AI-powered services — share a fundamental challenge: every replica, micros…
Парсил zakupki.gov.ru без API — расскажу что узнал
Месяц назад я начал делать pet-приложение для государственных закупок: свайпай тендеры как в Tinder, видишь AI-скоринг заказчика — стоит ли вообще лез…
Why We Accidentally Blocked Our Users: A Deep Dive into Idempotency in Distributed Systems
I learned one of my most important distributed-systems lessons the hard way. We were working on a payment flow connected to an external payment gatewa…
How to Handle Telegram Albums in Telegraf
When building Telegram bots with Telegraf, it is easy to expect that a media album arrives as a single message. In reality, Telegram sends every media…
Building a Redis Clone in Go
1. Introduction To better understand how databases and network servers work internally, I built a Redis-inspired in-memory database in Go. This projec…
Why your .NET 8 API needs a cache layer — and how to build it right with Redis/Valkey and tag invalidation
Caching is one of those things that sounds optional until your database starts getting hammered at scale, your response times creep up, and you realis…
Real-Time APIs Are Simpler Than You Think: Redis, Lua, and 4k Updates/sec
1. Intro — The Problem We Actually Had Building real-time systems is often presented as a distributed systems problem. Kafka, stream processors, event…
Scaling WebSocket
WebSocket provides low-latency, bidirectional communication between clients and servers. It is a widely used solution for building real-time systems. …
From Piper to Polly: How I Built a Production-Ready Text-to-Speech API (and Everything That Broke Along the Way)
A walkthrough of building a voice AI backend — through three TTS providers, a chunking problem, Redis caching, distributed locks, and a thundering her…
I Built an Online Multiplayer Ludo Game
So, this year I made a few resolutions — and sure, no one keeps to resolutions, but I decided to at least keep these two: first was no more tutorials,…
Filling a maintainer's "Help needed": shipping a Next.js 16 Redis cache handler
Filling a maintainer's "Help needed": shipping a Next.js 16 Redis cache handler Next.js 16 split caching into two distinct handler interfaces: cacheHa…
A Framework Is Not a Platform
For most of the time we have been writing web applications, two different teams answered two different questions. The framework team decided what the …
Making It Fast: Caching, Hot Paths, and Avoiding DB Calls
The Auth Gateway sits in front of every authenticated request in the platform. Its latency isn't just its own latency — it's the floor for every servi…
Token Revocation Without Killing Performance
JWTs have a hard problem hiding inside them: they're stateless. The whole point of a JWT is that the verifier can check a signature and make a decisio…
5-Minute AI Jobs and Closed Tabs — Why We Built Replay-Then-Tail SSE
We had a feature in production where a single user request could run for five-plus minutes — fetch documents, chunk them, hit an LLM per chunk, synthe…