Grade Release System

About

A 2-week project for the Cloud Engineering course (Prof. Dr. İlker Bekmezci): a grade release REST API deployed on AWS in three stages, with DynamoDB-backed idempotency and k6 load benchmarks.

Architecture

flowchart LR
  subgraph S1[Stage 1]
    A1[Client] --> B1[Single EC2]
  end
  subgraph S2[Stage 2]
    A2[Client] --> L2[ALB] --> G2[EC2 Auto Scaling group]
  end
  subgraph S3[Stage 3]
    A3[Client] --> P3[API Gateway] --> F3[Lambda]
  end
  B1 --> D[(DynamoDB)]
  G2 --> D
  F3 --> D

Results

• k6 load benchmarks up to 1,650 req/min
• 156 ms average latency on the serverless stage
• Automatic scale-out from 1 → 4 instances under burst load