AWS Developer case studies
AWS Developer · Put your knowledge to work in context.
The AWS Certified Developer – Associate (DVA-C02) is an intermediate-level credential for people who build and maintain applications on AWS. It suits developers with roughly a year of hands-on experience writing code that talks to AWS services, plus a working feel for the console, the CLI, and infrastructure-as-code tooling. Unlike the Solutions Architect track, this exam stays close to the code: how your application authenticates, stores state, handles asynchronous work, and ships to production. The content splits into four weighted areas. The AWS Developer case studies are 5 cases and about 4,181 words.
1Duplicated Orders in an SQS-Driven Importer
An order service runs a Node.js Lambda behind an SQS standard queue. The event source mapping uses batch size 10, the queue's visibility timeout is 30 seconds, and the function timeout is 120 seconds.
814 words, about 4 min2Cross-Account Downloads and Failing Large Uploads
A fintech platform lets users upload a 400 MB monthly statement through a web front end. The front end calls an API Gateway endpoint backed by Lambda, which returns a presigned S3 URL; the browser then PUTs the file directly to a bucket in account A.
832 words, about 4 min3Canary Deployment That Never Canaries
A team deploys a Lambda-backed REST API with AWS SAM. Production serves roughly 300 requests per second.
824 words, about 4 min4Throttling at 40% of Provisioned Capacity
A telemetry pipeline writes to a DynamoDB table events with partition key deviceId and sort key ts . Provisioned capacity is 2,000 WCU with auto scaling set to a 2,000–8,000 range.
929 words, about 5 min5A Fulfillment Pipeline That Loses State at the Worst Moment
Order fulfillment is one Lambda function invoked synchronously by API Gateway. It calls reserveInventory , chargePayment (up to 8 seconds), then createShipment (up to 45 seconds), and finally polls a DynamoDB flag waiting for a warehouse operator to approve large orders - an approval that can take up to three days.
782 words, about 4 min