Azure Developer

Role Overview

Azure Developers build cloud-native applications using Azure services. They focus on APIs, serverless apps, microservices, and event-driven systems.

Core Responsibilities

1. Application Development

• Build APIs using ASP.NET / Node.js / Python
• Create Azure Functions (serverless)
• Develop microservices (Container Apps / AKS)
• Use Azure SDKs and Managed Identity

2. API Design

• Design REST APIs with versioning
• Secure APIs using OAuth2 / Entra ID
• Use API Management for gateway

3. Data & Storage

• Work with Azure SQL and Cosmos DB
• Use Redis for caching
• Store files in Blob Storage

4. Messaging

• Use Service Bus for queues/topics
• Use Event Grid for events
• Use Event Hubs for streaming

5. Testing & Quality

• Write unit and integration tests
• Use Azurite for local testing
• Perform load testing

6. DevOps

• CI/CD with GitHub Actions / Azure DevOps
• Infrastructure as Code (Bicep / Terraform)
• Deployment slots for zero downtime

Code Example: Managed Identity + Key Vault

// C#
var credential = new DefaultAzureCredential();
var client = new SecretClient(new Uri("https://myvault.vault.azure.net/"), credential);
var secret = await client.GetSecretAsync("DatabaseConnectionString");

Code Example: Blob Upload

var blobServiceClient = new BlobServiceClient(
    new Uri("https://mystorage.blob.core.windows.net"),
    new DefaultAzureCredential());

var container = blobServiceClient.GetBlobContainerClient("uploads");
await container.UploadBlobAsync("file.pdf", stream);

Key Design Patterns

App → Cache → Miss → DB → Store in Cache

Queue → Multiple workers process messages

Service1 → Service2 → Service3 → Rollback if failure

DB Write + Event → Publish later reliably

Old system → gradually replaced by new services

Azure Services Used

Certification Path

Interview Cheat Sheet

• Auth: Managed Identity + DefaultAzureCredential
• Serverless: Azure Functions triggers
• Messaging: Service Bus for reliability
• Scaling: Serverless auto-scale
• Deployment: Slots or blue/green