---
title: "design service"
description: "Design a backend service architecture with clear boundaries, data models, and API contracts."
type: skill
canonical_url: https://claudary.paisolsolutions.com/skills/design-service
source: "Claudary"
difficulty: intermediate
author: "Claude Code Knowledge Pack"
date: 2026-07-10T11:19:43.515Z
license: CC-BY-4.0
attribution: "design service — Claudary (https://claudary.paisolsolutions.com/skills/design-service)"
---

# design service
Design a backend service architecture with clear boundaries, data models, and API contracts.

## Overview

Design a backend service architecture with clear boundaries, data models, and API contracts.

## Steps


1. Define the service scope:
2. Design the data model:
3. Design the API layer:
4. Plan the service internals:
5. Design inter-service communication:
6. Plan for observability:
7. Document the service contract.

## Format


```
Service: <name>
Domain: <what it owns>
Entities: <data model summary>
API Endpoints: <list>
```


## Rules

- Each service should own its data; no shared databases.
- Design for failure: every external call can fail.
- Use interface segregation; expose only what consumers need.

---

Source: [Claudary](https://claudary.paisolsolutions.com/skills/design-service) · https://claudary.paisolsolutions.com