Multi-Account Landing Zone and EKS Platform Deployment
Designed and deployed an AWS foundation for a growing engineering organization that needed stronger environment separation, clearer security boundaries, and a production-ready container platform.
Technical Implementation
- Built the landing zone around separate AWS accounts for workloads, shared services, and security, using Terraform modules for account bootstrap, guardrail IAM roles, CloudTrail, and baseline networking so additional environments could be added without redesigning the foundation.
- Defined the network model with segmented VPCs, private subnets, NAT routing, VPC endpoints, and cross-account access patterns, then validated Terraform changes with tflint, tfsec, and plan reviews before promotion.
- Deployed EKS with managed node groups, IRSA, the AWS Load Balancer Controller, ExternalDNS, cert-manager, and External Secrets Operator so ingress, TLS, DNS, and secret injection were handled as part of the platform rather than per application.
- Connected GitHub Actions pipelines to AWS through OIDC and used Argo CD to deploy workloads from Git, which made the deployment path reproducible and allowed platform validation through kubeconform, helm lint, and smoke tests on the first onboarded services.
Client Delivery & Handover
The project was implemented with the client architects and platform engineers through architecture reviews, paired Terraform work, cluster bootstrap sessions, and rollout checkpoints as environments were promoted. Handover included landing-zone diagrams, module guidance, EKS runbooks, deployment workflow documentation, and enablement sessions on platform operations, account administration, and workload onboarding. The goal was to leave the client team with both the working platform and the operating knowledge required to extend it safely.
Outcome
The client gained a cleaner AWS operating model, a more production-ready deployment foundation, and a platform architecture that could support additional teams without repeating early design mistakes.
Project Snapshot
Category
Cloud Architecture
Sector
AWS Architecture
Duration
18 weeks
Next Step
If this project is close to the work your team is planning, Ideamics can discuss comparable architectural decisions, delivery sequencing, and implementation tradeoffs in more detail.