Blog | Milan Dangol

system-designFeatured

Jun 8, 202513 min read

Payment Processing System at Scale: Stripe/Adyen Integration with AWS EventBridge, Lambda, and DynamoDB

Building a payment processing system handling millions of daily transactions - featuring EventBridge for event-driven orchestration, Lambda for serverless processing, DynamoDB for transaction state, idempotency guarantees, and real-time fraud detection with Kinesis.

MD

Milan DangolSr DevOps & DevSecOps Engineer

#aws#payments#eventbridge#lambda+4

system-designFeatured

Jun 1, 202512 min read

AI Chatbot System Architecture: WhatsApp Business API, Facebook Messenger, and AWS Bedrock Integration

Designing a multi-channel AI chatbot system handling 5M+ conversations monthly - featuring AWS Bedrock for conversational AI, SQS for message queuing, DynamoDB for conversation state, and Lambda for serverless processing across WhatsApp and Facebook Messenger.

MD

Milan DangolSr DevOps & DevSecOps Engineer

#aws#bedrock#chatbot#lambda+5

cloudFeatured

Jul 6, 20259 min read

Multi-Region AWS Infrastructure for Resilience: A Terraform Deep Dive

Learn how to architect highly available, multi-region AWS infrastructure using Terraform, Transit Gateway, Network Load Balancers, and intelligent routing strategies for enterprise-grade applications.

MD

Milan DangolSr DevOps & DevSecOps Engineer

#aws#terraform#multi-region#transit-gateway+2

cloudFeatured

Jun 22, 202511 min read

Cloud FinOps Framework: AWS Cost Intelligence Dashboard, Budgets, and Cost Anomaly Detection for Enterprise Cost Governance

Architecting a FinOps framework that reduced cloud costs by 30% and delivered predictable spend - featuring Cost Intelligence Dashboard, automated anomaly detection, chargeback mechanisms, and executive-level cost visibility.

MD

Milan DangolSr DevOps & DevSecOps Engineer

#aws#finops#cost-optimization#quicksight+2

cloudFeatured

Jun 15, 202511 min read

Building a Cloud Operating Model: AWS Organizations, Control Tower, and Service Catalog for Platform Engineering

Building an enterprise cloud operating model that reduced operational costs by 40% and accelerated time-to-market - featuring AWS Organizations multi-account strategy, Control Tower automated governance, and Service Catalog self-service infrastructure.

MD

Milan DangolSr DevOps & DevSecOps Engineer

#aws#organizations#control-tower#service-catalog+2

cloud

Jul 27, 202512 min read

Engineering AWS NLB Infrastructure for Financial Services Proxy Networks

Designing a multi-environment AWS NLB infrastructure for financial services using Terraform - featuring dual internal/external load balancers, JSON-driven per-port IP whitelists, intelligent port-range routing, and Transit Gateway hybrid connectivity.

MD

Milan DangolSr DevOps & DevSecOps Engineer

#aws#nlb#terraform#networking+2

platform-engineeringFeatured

Jun 29, 202511 min read

Internal Developer Platform: AWS CDK, CodePipeline, and Service Catalog for Self-Service Cloud Infrastructure

Creating an internal developer platform that reduced DevOps bottlenecks by 50% and accelerated feature delivery - featuring AWS CDK for infrastructure as code, CodePipeline for CI/CD automation, Service Catalog for self-service, and Systems Manager for configuration management.

MD

Milan DangolSr DevOps & DevSecOps Engineer

#aws#cdk#codepipeline#service-catalog+3

securityFeatured

Jun 26, 202511 min read

Mastering Secrets Management at Scale: Vault, AWS Secrets Manager, and Parameter Store

Unifying secrets management strategy combining HashiCorp Vault, AWS Secrets Manager, and Parameter Store - with cross-account sharing, automatic rotation, and Kubernetes integration via External Secrets Operator.

MD

Milan DangolSr DevOps & DevSecOps Engineer

#vault#secrets-manager#kubernetes#external-secrets+1

kubernetesFeatured

Jun 12, 202511 min read

Zero-Downtime EKS Upgrades in Production

Implementing a blue-green node group strategy for EKS cluster upgrades with automated rollback, PodDisruptionBudgets, and Terraform orchestration - achieving zero customer impact during Kubernetes version upgrades.

MD

Milan DangolSr DevOps & DevSecOps Engineer

#eks#kubernetes#upgrades#blue-green+2

kubernetes

Jul 20, 202512 min read

Implementing Private EKS with Transit Gateway and Hybrid Connectivity

Deploying a fully private EKS cluster with no public endpoints, Transit Gateway for multi-VPC and on-premises routing, PrivateLink for AWS services, and hybrid DNS resolution - achieving enterprise-grade network isolation.

MD

Milan DangolSr DevOps & DevSecOps Engineer

#eks#transit-gateway#privatelink#networking+2

security

Jul 13, 202514 min read

Designing a PCI-DSS Compliant Platform on AWS

Architecting a PCI-DSS Level 1 compliant platform on AWS - featuring network segmentation, encryption everywhere, comprehensive audit logging, automated compliance checks, and Security Hub dashboards for continuous compliance monitoring.

MD

Milan DangolSr DevOps & DevSecOps Engineer

#pci-dss#compliance#encryption#audit+1

cicd

Jul 3, 20256 min read

Automating Mobile App Releases with Fastlane: iOS & Android CI/CD

A comprehensive guide to setting up Fastlane for automated iOS TestFlight and Android Play Store deployments with GitHub Actions, including code signing, version management, and release automation.

MD

Milan DangolSr DevOps & DevSecOps Engineer

#fastlane#mobile#ios#android+2

devops

Jun 19, 202511 min read

Unifying GitOps for AWS: ArgoCD, Terraform, and Crossplane

Crafting a GitOps-driven infrastructure platform combining ArgoCD for application delivery, Terraform for foundational infrastructure, and Crossplane for Kubernetes-native AWS resource management - with drift detection and PR-based deployments.

MD

Milan DangolSr DevOps & DevSecOps Engineer

#gitops#argocd#terraform#crossplane+2

kubernetes

Jun 5, 202511 min read

Slashing EKS Costs: Multi-Tenant Kubernetes with Karpenter

Reducing EKS compute costs by 60% using Karpenters intelligent node provisioning - featuring Spot instance strategies, node consolidation, per-team resource quotas, and cost allocation with showback dashboards.

MD

Milan DangolSr DevOps & DevSecOps Engineer

#eks#karpenter#cost-optimization#spot-instances+2

Engineering Playbook

Payment Processing System at Scale: Stripe/Adyen Integration with AWS EventBridge, Lambda, and DynamoDB

AI Chatbot System Architecture: WhatsApp Business API, Facebook Messenger, and AWS Bedrock Integration

Multi-Region AWS Infrastructure for Resilience: A Terraform Deep Dive

Cloud FinOps Framework: AWS Cost Intelligence Dashboard, Budgets, and Cost Anomaly Detection for Enterprise Cost Governance

Building a Cloud Operating Model: AWS Organizations, Control Tower, and Service Catalog for Platform Engineering

Engineering AWS NLB Infrastructure for Financial Services Proxy Networks

Internal Developer Platform: AWS CDK, CodePipeline, and Service Catalog for Self-Service Cloud Infrastructure

Mastering Secrets Management at Scale: Vault, AWS Secrets Manager, and Parameter Store

Zero-Downtime EKS Upgrades in Production

Implementing Private EKS with Transit Gateway and Hybrid Connectivity

Designing a PCI-DSS Compliant Platform on AWS

Automating Mobile App Releases with Fastlane: iOS & Android CI/CD

Unifying GitOps for AWS: ArgoCD, Terraform, and Crossplane

Slashing EKS Costs: Multi-Tenant Kubernetes with Karpenter

Engineering Playbook

Payment Processing System at Scale: Stripe/Adyen Integration with AWS EventBridge, Lambda, and DynamoDB

AI Chatbot System Architecture: WhatsApp Business API, Facebook Messenger, and AWS Bedrock Integration

Multi-Region AWS Infrastructure for Resilience: A Terraform Deep Dive

Cloud FinOps Framework: AWS Cost Intelligence Dashboard, Budgets, and Cost Anomaly Detection for Enterprise Cost Governance

Building a Cloud Operating Model: AWS Organizations, Control Tower, and Service Catalog for Platform Engineering

Engineering AWS NLB Infrastructure for Financial Services Proxy Networks

Internal Developer Platform: AWS CDK, CodePipeline, and Service Catalog for Self-Service Cloud Infrastructure

Mastering Secrets Management at Scale: Vault, AWS Secrets Manager, and Parameter Store

Zero-Downtime EKS Upgrades in Production

Implementing Private EKS with Transit Gateway and Hybrid Connectivity

Designing a PCI-DSS Compliant Platform on AWS

Automating Mobile App Releases with Fastlane: iOS & Android CI/CD

Unifying GitOps for AWS: ArgoCD, Terraform, and Crossplane

Slashing EKS Costs: Multi-Tenant Kubernetes with Karpenter