Secure multi-cloud landing zone

Identity-first landing zones with shared guardrails across two cloud providers for a regulated SaaS scale-up.

Problem

The organization needed consistent identity, network, and logging baselines across AWS and Azure without freezing product delivery.

Context

Anonymized regulated SaaS company expanding into a second cloud while preparing for enterprise customer reviews.

Architecture

Hub-and-spoke network pattern, centralized identity federation, shared logging account, and environment-scoped workload accounts with policy-as-code gates.

Engineering challenge

Aligning two cloud models to one control catalog without duplicating every operational runbook.

Security considerations

Least-privilege roles, break-glass procedures, encrypted transit/logs, and continuous posture scanning.

Implementation

Phased rollout: identity and logging first, then network spokes, then workload migration with automated compliance checks in CI.

Results

Reduced environment provisioning time from weeks to days and produced a reusable architecture pack for subsequent regions.

Lessons learned

Shared control language matters more than identical cloud services; invest early in documentation and evidence packs.

Technology

AWS
Azure
Terraform
OIDC
SIEM integration