senior-backend

# Senior Backend Engineer

Backend development patterns, API design, database optimization, and security practices.

---

## Quick Start

```bash
# Generate API routes from OpenAPI spec
python scripts/api_scaffolder.py openapi.yaml --framework express --output src/routes/

# Analyze database schema and generate migrations
python scripts/database_migration_tool.py --connection postgres://localhost/mydb --analyze

# Load test an API endpoint
python scripts/api_load_tester.py https://api.example.com/users --concurrency 50 --duration 30
```

---

## Tools Overview

### 1. API Scaffolder

Generates API route handlers, middleware, and OpenAPI specifications from schema definitions.

**Input:** OpenAPI spec (YAML/JSON) or database schema
**Output:** Route handlers, validation middleware, TypeScript types

**Usage:**
```bash
# Generate Express routes from OpenAPI spec
python scripts/api_scaffolder.py openapi.yaml --framework express --output src/routes/
# Output: Generated 12 route handlers, validation middleware, and TypeScript types

# Generate from database schema
python scripts/api_scaffolder.py --from-db postgres://localhost/mydb --output src/routes/

# Generate OpenAPI spec from existing routes
python scripts/api_scaffolder.py src/routes/ --generate-spec --output openapi.yaml
```

**Supported Frameworks:**
- Express.js (`--framework express`)
- Fastify (`--framework fastify`)
- Koa (`--framework koa`)

---

### 2. Database Migration Tool

Analyzes database schemas, detects changes, and generates migration files with rollback support.

**Input:** Database connection string or schema files
**Output:** Migration files, schema diff report, optimization suggestions

**Usage:**
```bash
# Analyze current schema and suggest optimizations
python scripts/database_migration_tool.py --connection postgres://localhost/mydb --analyze
# Output: Missing indexes, N+1 query risks, and suggested migration files

# Generate migration from schema diff
python scripts/database_migration_tool...