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KEkingsley ebube onohkingsleyonoh.hashnode.devApr 26 · 7 min read

The Per-Tenant Rate Limit That Wasn't Per-Tenant

Tenant A blocked correctly at request 11. Tenant B also blocked at request 11. Phase 7 added a rate limit on POST /api/events that reads from tenants.config.rate_limits.events_per_minute. The default cap is 200 requests per minute. A tenant who needs...

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DGDomenico Giordanorollgate-blog.hashnode.devApr 22 · 4 min read

Feature Flags in Node.js: Express and Fastify Guide

Originally published on rollgate.io/blog/feature-flags-nodejs. Why Feature Flags in Node.js? Node.js powers a huge slice of production backends — REST APIs, GraphQL gateways, background workers, BFF layers, real-time services. All of them share the ...

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KEkingsley ebube onohkingsleyonoh.hashnode.devApr 18 · 7 min read

Why I Designed the Whole System Around Kafka and Then Deployed Without It

The Redpanda container was configured for 256MB of RAM. On a local dev machine with 32GB, that's nothing. On the production VPS with 1GB total, it was a quarter of the entire budget before the notification service had processed a single event. I had ...

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HRHarun R Rayhanblog.harun.devApr 11 · 14 min read

Building a Multi-Tenant SaaS Auth Layer on AWS Lambda with Fastify

I have a production SaaS running on AWS Lambda with Fastify. Single tenant, single customer, everything working great. Then the second customer signed up. That's when things got interesting. Suddenly

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HRHarun R Rayhanblog.harun.devMar 18 · 18 min read

How I Architected a Fully Serverless SaaS on AWS Lambda with Fastify

I recently built a multi-tenant SaaS API from scratch. The product uses AI models under the hood and re-trains them regularly on new data. The requirements were pretty clear: low operational overhead,

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MSManuel Spigolonbackend.cafeMar 16 · 4 min read

React Server-Side Streaming with Fastify

React 18+ introduced renderToPipeableStream, a powerful API for streaming server-rendered HTML to the browser. Instead of waiting for the entire page to render before sending it to the client, you can

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AJArihant Jainarihantjain916.hashnode.devMar 9 · 6 min read

Migrating Fastify to NestJS With 1,000 Users in Production

Not a toy project — a real production app with 1,000+ users. This is a step-by-step breakdown of how I planned and executed a full Fastify to NestJS migration without breaking anything. Introduction

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DGDevTools Guidedevtoolsguide.hashnode.devMar 3 · 12 min read

Backend Framework Comparison: Express vs Fastify vs Hono vs Elysia

Backend Framework Comparison: Express vs Fastify vs Hono vs Elysia The JavaScript backend framework landscape has fragmented. Express dominated for a decade, but newer frameworks offer significantly better performance, TypeScript support, and develop...

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RRoycepkgpulse.hashnode.devFeb 28 · 6 min read

Express vs Fastify: Which Node.js Framework Should You Choose?

Fastify handles 80,000 requests per second. Express handles 25,000. That's a consistent 3x performance gap across every major benchmark. But Express still has 76 million weekly downloads — 14x more than Fastify. If raw speed were all that mattered, t...

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JSJakob Stanleyjakobstanley.hashnode.devFeb 9 · 4 min read

Automating Repetitive Backend Tasks with Fastify Boilerplate Templates

In modern backend development, time is a valuable commodity. As applications grow and requirements evolve, developers often find themselves rewriting the same boilerplate code: authentication, routing setup, error handling, logging, validation layers...

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Trending tags this week

The Per-Tenant Rate Limit That Wasn't Per-Tenant

Feature Flags in Node.js: Express and Fastify Guide

Why I Designed the Whole System Around Kafka and Then Deployed Without It

Building a Multi-Tenant SaaS Auth Layer on AWS Lambda with Fastify

How I Architected a Fully Serverless SaaS on AWS Lambda with Fastify

React Server-Side Streaming with Fastify

Migrating Fastify to NestJS With 1,000 Users in Production

Backend Framework Comparison: Express vs Fastify vs Hono vs Elysia

Express vs Fastify: Which Node.js Framework Should You Choose?

Automating Repetitive Backend Tasks with Fastify Boilerplate Templates