https://rahulladumor.com/writing Architecture notes from real production AWS, GenAI, and platform-engineering work by Rahul Ladumor, Principal Cloud & AI Platform Architect. en-us hello@rahulladumor.com (Rahul Ladumor) hello@rahulladumor.com (Rahul Ladumor) https://rahulladumor.com/writing/why-aws-bill-keeps-climbing https://rahulladumor.com/writing/why-aws-bill-keeps-climbing Sat, 06 Jun 2026 00:00:00 GMT FinOps Five root causes I see across every cost engagement, ranked by how often they show up, plus what fixes actually work and in what order. https://rahulladumor.com/writing/how-to-choose-aws-architect https://rahulladumor.com/writing/how-to-choose-aws-architect Sat, 06 Jun 2026 00:00:00 GMT Hiring AWS architects Real shortlist criteria from CTO conversations. The five questions that separate production architects from cert-only contractors. https://rahulladumor.com/writing/rahul-vs-typical-consultancies https://rahulladumor.com/writing/rahul-vs-typical-consultancies Sat, 06 Jun 2026 00:00:00 GMT Engagement models Solo senior architect vs AWS consultancy vs full-time hire: side-by-side on speed, cost, scope, bus factor, and when each is the right call. https://rahulladumor.com/writing/aws-cdk-s3-eventbridge-lambda-trigger-cost-and-architecture https://rahulladumor.com/writing/aws-cdk-s3-eventbridge-lambda-trigger-cost-and-architecture Mon, 06 Apr 2026 00:00:00 GMT AWS CDK A CDK TypeScript stack that routes S3 events through EventBridge properly: VPC placement, KMS, Secrets Manager, the cost model, and the failure modes most setups skip. https://rahulladumor.com/writing/aws-cdk-codedeploy-ec2-auto-scaling-pipeline https://rahulladumor.com/writing/aws-cdk-codedeploy-ec2-auto-scaling-pipeline Mon, 06 Apr 2026 00:00:00 GMT AWS CDK CodePipeline, CodeDeploy, and Auto Scaling in CDK: VPC, ALB, ASG, SSM config, and the lifecycle hook settings that keep deploys clean under real load. https://rahulladumor.com/writing/aws-cdk-web-app-deployment-fargate-aurora-cloudfront https://rahulladumor.com/writing/aws-cdk-web-app-deployment-fargate-aurora-cloudfront Mon, 06 Apr 2026 00:00:00 GMT AWS CDK The full web-app stack most tutorials skip: VPC isolation, Fargate on private subnets, Aurora with KMS, CloudFront, secret rotation, and the six operational gaps that page you at 2am. https://rahulladumor.com/writing/aws-cdk-iam-and-vpc-security-as-code-with-kms-and-wafv2 https://rahulladumor.com/writing/aws-cdk-iam-and-vpc-security-as-code-with-kms-and-wafv2 Mon, 06 Apr 2026 00:00:00 GMT AWS CDK A production CDK stack enforcing KMS encryption, least-privilege IAM, VPC endpoint routing for secrets, WAFv2 on CloudFront and API Gateway, and Security Hub, all versioned and testable. https://rahulladumor.com/writing/aws-datasync-dms-step-functions-cdk-migration-pipeline https://rahulladumor.com/writing/aws-datasync-dms-step-functions-cdk-migration-pipeline Mon, 06 Apr 2026 00:00:00 GMT AWS CDK Coordinating DataSync, DMS, Glue, and OpenSearch under one Step Functions control plane, and exactly where incomplete data sneaks through if you skip the readiness checks.