AWS Lambda and NestJS: Communication between services
Originally published on Medium on November 11, 2023. In this guide, we’ll speak about communication in a distributed system using AWS Lambda and NestJ…
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NestJS v12.0 vs. Ditsmod v3.0: A Deep Dive into Node.js Framework Architectures (Part 1)
If you are building enterprise-grade Node.js applications with TypeScript, chances are you are already deeply familiar with NestJS . It has become the…
Structured Logging for Node.js
In Monitoring a SaaS in Production we wired up metrics and alerts so the team knows something is wrong within minutes of it happening. Metrics tell yo…
Audit Logs You Can Trust
In Structured Logging for Node.js , I covered how to turn scattered console.log calls into structured, queryable events. That solves the "what happene…
Scaling a SaaS Beyond One Server
In Deploying a Full Stack SaaS , I got the app running in production on a single instance: Docker images, a CI/CD pipeline, one NestJS container and o…
Monitoring a SaaS in Production
In the last article , I set up a pipeline that builds, tests, and deploys the monorepo automatically. That solves getting code out safely and repeatab…
Organizations, Teams, and Invitations
In Subscription Billing and Plans we wired up the part of the product that collects money. This article covers the part that gets people into the prod…
Subscription Billing and Plans
Last time, in Accepting Payments with Stripe , I covered the part everyone assumes is the hard bit: taking a card and moving money. It isn't, really. …
A Production Security Checklist
We spent the last article making the app fast. This one is about making sure it's still standing when someone tries to break it. That's the uncomforta…
The Quiet Risk in How Most Banks Store Customer Documents, and How NestJS Handles It Properly
A compliance officer at a bank was preparing for an upcoming audit when she asked a question nobody on the engineering team had a clean answer to. Eve…
A Bank Wanted to Use AI to Approve Loans Faster, Here Is What I Would Build Around It in NestJS
A loan officer at a small digital bank was excited about the new model the data team had built. It could score a loan application in under a second, b…
The First Question I Would Ask a Bank Before Using NestJS to Make Sure Their Money Is Always Accounted For
A finance officer at a mid sized bank was closing out the month when the numbers refused to line up. Customer accounts held a few cents more, in total…
A Folder Structure That Scales for Full Stack SaaS
Your .env files are validated and out of Git by now, thanks to the last article on managing environment variables and secrets . The app boots with the…
Building Production-Ready AI Features in Next.js: Beyond the Chatbot
Most AI tutorials teach you how to send a prompt to an LLM and display the response. That's enough for a demo. But building AI features that are relia…
A founder once asked me why refunds kept disappearing, here is what NestJS was actually doing
A founder once messaged me with a problem that sounded almost too simple to be real. Customers were saying they never received their refund. Support w…
Here is how I would use NestJS to stop one fraud check from freezing an entire fintech platform
Picture this. A fintech company processes thousands of transactions a day. Every single one of them has to pass through a fraud check before it goes t…
Idempotency in NestJS, and Why Your Transaction ID Is Not Always Enough
Picture a customer tapping send on a payment, the app freezes for a second, and out of habit they tap it again. If your backend is not built to handle…
How NestJS Handles Ingestion Boundaries When Transaction Data Comes From an External Bank API
Most banking backend tutorials focus on transactions your own system creates. A user taps a button, your service writes a record, and you control ever…
How NestJS Handles Secure Transactions in Banking Applications
Banking software cannot afford to be casual about anything. Every transaction needs to be verified, logged, protected from tampering, and traceable if…
CQRS in NestJS: When It's Worth the Complexity
The person most responsible for the industry-standard explanation of CQRS is also the person telling you not to use it. Martin Fowler's bliki entry on…
Building a Production Grade Authentication System with NestJS
Building a Production Grade Authentication System with NestJS Security is not a feature you bolt on after the fact. It is an architectural decision th…
We Keep Our Architecture Rules in the Repo. The AI and the New Hire Read the Same File.
A few weeks ago I watched an agent build a feature beautifully. Clean code. Tests passed. Did exactly what I asked. Three sessions later, I opened the…
How I Turned My Personal Storage Accounts Into a Massive S3 Bucket for $0
As developers, we’ve all been there: you’re building a hobby project, a side hustle, or a microservice, and you need object storage. You look at AWS S…
NestJS: The Backend Framework That Makes Node.js Feel Grown-Up 🚀
If you have ever tried to build a large Node.js backend and thought, "Why does this feel like I'm making it up as I go?" — you are not alone. Express …
Boosting Observability in NestJS with RedisX Metrics
Observability isn't just a buzzword; it's a necessity, especially when diving into distributed systems. If you're using NestJS, you might want to take…
Nest.js 12 preview is here!
The next major version of NestJS is officially knocking on our doors, and it brings one of the most anticipated architectural shifts in the Node.js ec…
How to Model Teams Inside a Multi-Tenant Product
Once you have the tenant boundary, the next question is what lives inside it. This is how I modeled teams with roles, invitations, and lifecycle state…
A NestJS reference app that proves the nest-native stack under realistic backend pressure
TL;DR : nest-native/reference-app is a v0.1 reference application that demonstrates the nest-native stack end-to-end — nest-drizzle-native and nest-tr…
Feature Based Clean Architecture. Часть 2: Декомпозиция на сервисы: анализ ограниченности подхода
Стандартный ответ на god-сервис — декомпозиция: разнести логику по нескольким сервисам с чёткими зонами ответственности, оставить тонкий оркестратор. …
Подключили B2B email-платформу к голосовым ассистентам через MCP. Архитектура, код, где ломается
TL;DR. Live Direct Marketing (LDM) — B2B email-платформа с собственным MCP-сервером. Веб-интерфейс и MCP экспонируют один и тот же /api/* через Hybrid…