aws-cloud-services

Serverless architecture on AWS combines S3 for object storage, Lambda for event-driven compute, and DynamoDB for NoSQL data. Use CloudFormation to define these resources together, configure S3 event triggers to invoke Lambda functions, and store processed data in DynamoDB. This pattern scales automatically and eliminates server management overhead.

IAM security best practices include enforcing least-privilege access policies, using roles instead of long-term credentials, enabling MFA, and auditing permissions across regions. Apply consistent policies through CloudFormation templates for repeatable, multi-region deployments. Regular audits ensure compliance and prevent credential misuse.

Production-ready CloudFormation templates separate concerns into logical stacks for compute, storage, and networking. Use parameters for environment-specific values, implement security best practices in IAM policies, enable monitoring, and version control templates. Structure enables repeatable deployments, rollback capability, and compliance across environments.

Yes. Configure S3 bucket events to trigger Lambda functions that process and transform data, then store results in DynamoDB. This event-driven pattern handles asynchronous workflows, scales independently, and integrates with other AWS services. CloudFormation automates the entire pipeline setup.

AWS SDK v3 uses credential chains that automatically resolve from environment variables, instance roles, or credential files. Implement retry logic with exponential backoff for transient failures, handle service-specific exceptions, and use pagination for large result sets. Production code requires comprehensive error handling to ensure reliability.

Presigned URLs grant temporary, credential-free access to S3 objects. Generate them server-side using AWS SDK with expiration limits, share the URL with clients, and revoke access by setting object ACLs or bucket policies. This pattern protects credentials while enabling controlled file sharing.