CASE STUDY & REFERENCE PLAYBOOK
Enterprise Azure Landing Zone & Self-Service Developer Platform
Infrastructure-as-Code and DevOps automation for a regulated engineering enterprise
THE CHALLENGE
Rapid Cloud Adoption Without a Foundation
The client had moved workloads to Azure quickly — but without a foundation. Development teams had broad access (“the keys to the kingdom”) and built environments by hand, each in its own way. There was no consistent subscription model, no landing zone, and no guardrails waiting for new workloads. The result was familiar and costly:
Silos and inconsistency
Every team solved the same networking, identity, and security problems separately, differently, and repeatedly.
Slow delivery
Standing up an environment meant tickets, hand-offs, and days-to-weeks of waiting before a developer could deploy.
Security & compliance risk
Manual “click-ops” in the portal produced undocumented, drifting configurations and inconsistent controls.
No repeatability
Environments couldn't be reliably reproduced, and there was no audit trail for how anything was built.
Why Infrastructure-as-Code & DevOps Is Necessary
These problems are not unique to one company — they are the predictable outcome of cloud adoption without engineering discipline. Infrastructure-as-Code (IaC) and DevOps directly address them:
Repeatability & consistency
Infrastructure defined in code produces identical environments every time. No snowflakes, no “it works in dev but not in prod.”
Speed & self-service
Reusable templates let teams provision governed environments in minutes, not weeks — without waiting on a central team.
Security & compliance by default
Controls are baked into templates, so every deployment is compliant from the first line — not reviewed after the fact.
Governance & auditability
Every change lives in source control, goes through review, and policy is enforced automatically with a complete history.
Reduced risk
Automated pipelines with change-preview (“what-if”) and approval gates eliminate manual portal errors and configuration drift.
Cost control & scalability
Standardized, right-sized templates prevent orphaned resources, and onboarding a new team becomes a configuration change, not a project.
The Solution — Delivered by Tuwa Solutions
Tuwa Solutions designed and built a governed Azure platform aligned to the Microsoft Cloud Adoption Framework, with a self-service model for application teams. Key elements:
1. Azure Landing Zone (hub-and-spoke)
Management-group hierarchy with separate platform and application subscriptions; central hub for connectivity, firewall, DNS, and on-premises links; isolated spokes for each workload.
2. Reusable, modular Bicep
Every component built as a parameterized module with feature flags, so one template set serves dev, test, and prod.
3. Two-layer separation
Platform layer owned by IT and an application layer owned by developers.
4. Governed subscription vending
New landing zones created by code, automatically inheriting policy, RBAC, and hub connectivity.
5. CI/CD on Azure DevOps
Multi-stage pipelines using OIDC / workload identity federation (no stored secrets), mandatory what-if previews, and per-environment approvals.
6. Security engineered in
Private endpoints, deny-by-default NSGs, secrets in Key Vault, managed identities, and centralized monitoring and threat protection.
7. Self-service developer experience
A “golden path” for developers to deploy production-grade, compliant applications.
8. Encapsulation & zero click-ops
Platform complexity hidden behind a simple surface; every environment from dev to prod created and wired entirely in code.
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