Building an AI Automation Pipeline in Node.js with BullMQ: Queues, Retries and Rate Limits
Most AI automation demos are one await away from breaking. A webhook comes in, the handler calls a model, the response gets written to the database,…
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Redis vs Dragonfly: A Hands-On Comparison
I have used Redis on almost every backend project I can remember. Caching, sessions, rate limiting, queues, the occasional bit of temporary state th…
Asynchronous ERP Sync Engine: High-Throughput Webhook Ingestion & Durable Queue Orchestration
Processing inbound e-commerce order webhooks directly against downstream ERP systems (such as Odoo or SAP) exposes core applications to third-party…
Caching from Zero to Production
Every backend eventually hits the same wall: the database cannot keep up, but the data barely changes. That is the moment caching stops being an opt…
When Redis goes down, does your app die?
The Problem: The App Dies There was an incident that caused our application to fail because our Redis cache went down. It was in the middle of movin…
How hot do you like it?
The real economics of Redis tiered storage, and why you might be paying too much for hot data The concept of splitting data resident in a Redis™ clu…
Redis vs Memcached: Complete Comparison
Redis vs Memcached: Complete Comparison In the high-stakes world of modern application development, performance and scalability are paramount. Devel…
Building a Temporary Message Sharing API with NestJS, PostgreSQL, Prisma & Redis
I recently built a temporary message-sharing API from scratch using NestJS, PostgreSQL, Prisma and Redis . The idea is simple: Create a message, gen…
Ten Million Keys, One Missing Index
This article explores how a per-entity index improves Redis cache invalidation by replacing repeated full-keyspace scans with targeted lookups. All…
Agent-Cache: Multi-Tier LLM Caching for Valkey and Redis
Agent loops burn tokens and clock cycles on repeated work. The same LLM prompt fires twice, the same tool call fetches identical data, and session s…
Redis Is Not Your Database: Designing Cache Failures, Fallbacks, and Resilient Backends
Redis can make a backend dramatically faster. It can also make a backend dramatically more fragile if the architecture treats the cache as a depende…
WebSocket Telemetry at Scale: When One Process Isn't Enough
[ EXECUTIVE TEARDOWN // TL;DR ] In-memory broadcast only reaches the local process — multi-instance real-time needs a shared backplane (Redis pub/su…
Memory efficiency: bytes per key
Part 5 of 7 · ← Latency under load · Next: Operational simplicity → Part 5. The shortest post in the series, and the least arguable number in it — b…
Nexus Core v1.7.0: Moving from MongoDB-Centric to Multi-Database Architecture
Nexus Core v1.7.0: Moving from MongoDB-Centric to Multi-Database Architecture Today I released Nexus Core v1.7.0 , and this is one of the most impor…
I was tired of heavy cache systems, so I built my own open-source KV-Storage🚀
A few weeks ago, I ran into a frustrating problem. Every time I needed a fast standalone Key-Value cache for my pet projects or microservices, I had…
Fluent Swap: как я вышел за пределы CRUD и начал разрабатывать matchmaking на Go
Большинство backend‑проектов начинаются предсказуемо: HTTP‑запрос, бизнес‑логика, SQL и ответ клиенту. Но что изменится, если вместо очере…
What Database Race Conditions Taught Me About Distributed Locks
What 3 Database Race Conditions Taught Me About Distributed Locks When you start building backend systems with asynchronous workflows, everyone tell…
Creating an AI Streamer That Remembers Previous Visits — Designing Memory and Multi-Streaming States
📝 Originally published (in Japanese) at forge.workstyle.tech . I'm building an AI avatar stream that runs unattended. No human broadcaster — the ava…
Redora 0.3.1 — Redis for NestJS
There are already good Redis tools for NestJS. Most of them mainly help you connect NestJS to Redis and use the Redis client. That's useful, but as…
System Design: A popular cache key expires and 40,000 requests hit your database. How do you fix it?
You are in a Staff Engineer system design interview. The interviewer draws a simple architecture on the whiteboard: an API, a Redis cache, and a Pos…
Shopify Replaced Redis With MySQL for Inventory Reservations — and It Scaled Better
Shopify just did something that would make most engineers do a double-take: they replaced Redis with MySQL for their inventory reservation system, a…
Caching: How Backend Systems Get Faster with Redis
Analogy Imagine you have built a backend API that works perfectly. You deploy it. Users start coming in. At first, everything feels fast. Then the t…
The Redis & Kafka Interview Questions I Got Asked 23 Times (And How I Finally Answered Them)
Every senior backend interview I've done in the last 18 months asked at least one Redis question and one Kafka question. Below are the 10 that came…
Directus + Coolify: Should You Decouple Postgres & Redis?
This is Part 2 of the Directus + Coolify series. If you're new here, start with "Secure Your VPS Before Hackers Do" and the first Directus + Coolify…
Correctness Has a Price: We Benchmarked Fair Leaderboards
Engineering posts often end with: The new design is correct, scalable, and fast. Fast compared with what? When we changed Podium so tied players ran…
Redis Cluster Won't Shard Your Hot Leaderboard
"We use Redis Cluster" can mean two very different things: Our dataset is distributed across Redis nodes. Every individual data structure is distrib…
Your Redis Leaderboard Is Probably Breaking Ties Wrong
A leaderboard looks like a one-command problem: ZADD weekly 100 alice ZADD weekly 100 bob ZREVRANGE weekly 0 -1 WITHSCORES While building Podium , a…
Celery + Redis: Background Tasks Made Simple
Celery + Redis: Background Tasks Made Simple tags: python, celery, redis, tutorial tags: python, celery, redis, tutorial Celery + Redis: Background…
Four Vectors, One Record: How I Split Embeddings Before They Hit Search
The failure that pushed me into this design was not subtle. I had a blended embedding that kept returning candidate matches that looked reasonable a…
RockPlayer: Building a Modern Music Player with Angular, ASP.NET Core, Redis, and YouTube
Hello everyone! After publishing my Machine Learning with ML.NET series, I decided to turn the recommendation model into a complete application. In…