System Design ‐ Landscape

Technologies

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• GraphQL
• HashiCorp Vault

✅ EC2, VPC, EBS, and Load Balancers ✅ RDS, Aurora, and DynamoDB ✅ Route 53, CloudFront, and Global Accelerator ✅ Architecting for resilience, high availability, and disaster recovery ✅ Security best practices and cost optimization

Key Components

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• High level components

Principles

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• GraphQL

Patterns

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Software Architectural Pattern

Solution Design Patterns

• Backends for frontend
• CQRS - Best matched with GraphQL

Security

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• GraphQL

Best Practices

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• GraphQL

Reference Architecture Design

AWS EC2 - Auto Scaling Reference

Infra Setup

1. Create VPC

2. Create Internet Gateway (IG) to enable the VPC resources accessible via internet (option available under VPC) 2.1 Attach the newly created internet gateway (IG) to the VPC (option available under Actions menu)

3. Create Public Subnet - atleast 2 subnets in each availability zone to ensure maximum availability of the services (under the desired VPC) 3.1 Configure 2 different IP ranges in IPv$ subnet CIDR block to differentiate (ex: subnet1: 10.0.1.0/24, subnet2: 10.0.2.0/24)

4. Create Route Table (under VPC)

AWS Disaster Recovery (DR) Plan