This chapter is the gatekeeper. It exists to answer one question only: “Is this nanoservice correctly designed, or are we about to encode future problems?” If any item in this checklist cannot be answered confidently, implementation must stop. 1. ...
Mobile clients are the fastest way to accidentally destroy a clean backend design. They bring: unreliable connectivity background execution limits push notifications retries and duplicates UX pressure for “real-time” behavior If nanoservices r...
At this point, we have: clean nanoservice boundaries disciplined internal structure strict communication rules What remains is the most common place where systems collapse: Deciding what runs synchronously and what must be executed in the backg...
Once nanoservices are defined and internally disciplined, the next danger is not boundaries — it is communication. In OTP systems, communication is cheap, fast, and tempting.That temptation must be controlled. This chapter defines how nanoservices ar...
After defining domain logic correctly, the next temptation is immediate: “Let’s design the database now.” This temptation has destroyed more systems than bad algorithms ever have. In this architecture, persistence is deliberately the last concern, ...
After locking REST down as a thin entry point, we arrive at the most misunderstood part of backend systems: Where do business rules actually belong? Most systems answer this poorly.They scatter rules across controllers, services, database constrain...