The Production Leap: Scaling Agent Workflows Globally on thingd.cloud (Part 4)
Over the last three posts, we explored the concept of "Zero-UI" software, deep-dived into our high-performance Rust core engine, and wrote local agent…
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Four Ways a Refresh Token Request Fails — Only One Means Trouble
A refresh token exists for one reason: exchange itself for a new access token, once, and then stop being useful. Everything about a good implementatio…
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…
NestJS Zero-Downtime Deployment on DigitalOcean with GitLab CI/CD and PM2
Deploying a NestJS backend to production with true zero downtime is more involved than most guides suggest. This is a complete, battle-tested walkthro…
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…
How I Built a Production Ready Microservice Notification System with NestJS, Redis, Bull Queues, and Docker
I built a real time notification microservice with NestJS, Redis, PostgreSQL, and Docker. When you are building a system that needs to deliver notific…
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…
How to share Supabase auth between Next.js and Expo (one client, both platforms)
Most teams building a web + mobile product end up with two auth integrations that slowly drift apart. You don't need that. Here's how to run a single …
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…
How we built multi-tenant isolation in NestJS that even a junior dev can't break
About a year ago, a junior dev on our team wrote a cleanup job that nuked records without a tenant filter. In staging, thankfully — but it wiped out a…
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…
Nestjs — Stop burning AI credits to write Swagger docs, let the CLI do it!
Last Sunday I shared nestjs-docfy, a small library to move Swagger decorators out of NestJS controllers into companion *.controller.docs.ts files. The…
Rate Limiting in NestJS with GraphQL
Rate limiting is a critical security mechanism that protects your APIs from brute-force attacks, DDoS (Distributed Denial of Service) attempts, and ab…
What Happens When a Database Operation Fails Midway? NestJS Transactions to the Rescue
Imagine a simple money transfer scenario. John sends money to his friend Sarah. The system successfully deducts money from John's account, but before …
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…
Integrating Webpay Plus into a modern stack
If you've ever worked on an e-commerce project in Chile, sooner or later you bump into Transbank. There's no avoiding it. I built a reference template…
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…
NestJS vs Express: Which One Should You Choose in 2025?
NestJS vs Express: Which One Should You Choose in 2025? Node.js gives you two wildly different starting points when building a backend: the minimal, u…
Production Ready NestJS Microservice Setup with Candy-Nest-CLI 🍬
If you build microservices with NestJS, you already know how powerful and structured the framework is. However, starting a new project often involves …
How I Stopped Writing the Same 5 Methods in Every NestJS Repository
If you use NestJS with Prisma, you've probably had this moment: you open a new module, look at the previous one, and copy-paste the same methods you a…
How I Built an AI Tools Directory in an Internet Café — Next.js + Tailwind + Vercel
I spent the last few days building useaitools.me from scratch in an internet café in China. Here's the tech stack and what I learned along the way. St…
Feature Based Clean Architecture. Part 4: FBCA: Formalizing Responsibility Boundaries in a NestJS Module
An architectural doctrine for NestJS projects: a breakdown of typical codebase degradation scenarios and the structural constraints that keep them fro…
Feature Based Clean Architecture. Part 3: The Architectural Risk of Cycles in NestJS: ROI of Decisions on a Five-Year Horizon
An architectural doctrine for NestJS projects: a breakdown of typical codebase degradation scenarios and the structural constraints that keep them fro…
Feature Based Clean Architecture. Part 2: Decomposition into Services: An Analysis of the Approach's Limits
An architectural doctrine for NestJS projects: a breakdown of typical codebase degradation scenarios and the structural constraints that keep them fro…
Feature Based Clean Architecture. Part 1: How a NestJS Application Evolves Into an Unmaintainable State
An architectural doctrine for NestJS projects: a breakdown of typical codebase degradation scenarios and the structural constraints that keep them fro…