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. Requirements - 5+ years with AWS, including 3+ years working in infrastructure-as-code. - Hands-on AWS CDK experience in TypeScript — construct trees, logical ID derivation, and what happens when a construct path changes. - Real experience with CloudFormation resource identity: stack refactoring, logical ID overrides, cdk diff against deployed state, drift detection. - Working Terraform knowledge — comfortable operating across the CDK/Terraform boundary. - Solid AWS serverless background: Lambda, API Gateway (REST), SQS and DLQs, Parameter Store, KMS, Secrets Manager. - Experience with AWS edge and security services — WAF web ACLs, mutual-TLS custom domains and truststores, cross-account/cross-boundary IAM. - Practical experience migrating Nodejs runtimes (e.g. Node 18 → 24), including dependency and deprecation handling. - CI/CD pipeline experience with OIDC federation and approval gates (GitHub Actions or equivalent). - Working knowledge of observability tools — X-Ray, CloudWatch metrics and alarms, log retention. - Comfortable communicating clearly with non-engineers, and working well when parts of the scope are still being figured out. - Fluent English (C1 level) for daily communication with the client. Engagement details - Hourly contractor - 100% remote - Estimated duration: 6–8 weeks - Time zone: EST or MST Highlights AWS CDK , CloudFormation, Terraform, AWS Serverless (Lambda, API Gateway REST, SQS/DLQ, Parameter Store, KMS, Secrets Manager), AWS Edge & Security (WAF, mTLS, cross-account IAM), Node.js, CI/CD Originally posted on Himalayas