Cloud Engineer AWS ( CDK / Serverless) ( 102-09SENG-01 )

This role modifies a live serverless gateway in production — no downtime, no change in behaviour — leaving a clean handoff point for a downstream build managed in Terraform. This is careful surgery on production infrastructure with active external consumers, not a greenfield build. The scope includes modernizing a CDK estate made up of four stacks, six Lambda functions, a WAF web ACL, an mTLS custom domain/truststore, and a REST API — preserving resource identity during consolidation and coordinating two sequenced deployments with a tested rollback path. What you will do - Inventory the CDK estate and build a modernization plan: upgrade the CDK library/CLI, replace deprecated constructs, move hardcoded context into per-environment config. - Consolidate duplicated stacks into shared constructs without losing resource identity — map logical IDs before and after, pick a preservation method, and confirm nothing gets replaced before touching production. - Run the library upgrade and the stack refactor as two separate, ordered deployments, with a rollback path tested in dev and test first. - Migrate all six Lambda functions from Node 18 to Node 24, close an open PII logging finding, and regression-test each one. - Re-verify the security perimeter after both deployments — WAF, the mTLS domain and truststore, X-Ray tracing, upstream timeouts — working directly with the customer's POS team across all six external callers. - Build deployment pipelines for dev/test/prod with OIDC federation, approval gates, and a ServiceNow change step. Add CDK assertion tests, drift detection, and API access log retention. - Publish the SQS queue ARN and KMS key ARN via Parameter Store, and grant send permission to the downstream Terraform-managed system — this is the key ordering dependency for that team's build. - Align naming, tagging, and documentation with the customer's internal standards, and document your identity-preservation decisions clearly enough for the next engineer to follow.