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I write about what I ship in production: NestJS, AWS, and distributed systems.
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Six boxes on the diagram. Six microservice temptations. I almost fell for it again — until I got that the full map doesn't mean shipping it all in week one, and splitting repos doesn't split the domain
3 articles
Rebuilding a banking core phase by phase — accounts, transfers, ledger, and events with open source NestJS code and articles that explain why, not just how.
4 articles
Production NestJS patterns — modular architecture, testing, observability, and AWS from real backends, one article at a time.
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Three seconds on the spinner. Timeout on screen. Did the money move? I reopened my Arkano challenge next to a fintech architecture map — and understood why POST /transfer was never just an endpoint.
A LinkedIn post on fintech architecture, a recent technical challenge, and a decision to rebuild a banking core from scratch — slower this time, to actually learn.
If onboarding a new customer requires deploying a new application or duplicating an entire database, your SaaS architecture probably isn't ready to scale. Learn how to implement multi-tenancy in NestJS in a clean and maintainable way.
If every new feature forces you to modify five different services, you probably have a coupling problem. Learn how Event-Driven Architecture helps decouple modules and scale NestJS applications.
When your UserService handles POST and GET, optimizations on one side break the other. Learn commands, queries, and handlers with @nestjs/cqrs.
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