Engineering case study

Assignar

AWS infrastructure built around tenant boundaries.

AWS Cloud SecurityCloud ArchitectureManaged Services

The challenge

An existing hosting environment needed to support growth and demonstrate tenant isolation.

The engineering

An AWS re-architecture with ECS Fargate, encrypted data stores, WAF and repeatable Terraform modules.

The result

A phased migration with tenant isolation confirmed through a third-party security review.

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Client: Assignar
Industry: Construction Technology
Location: Sydney, Australia

About project

AWS Cloud Security

Cloud Architecture

Managed Services

AWS

Assignar is a field operations management platform used by construction and infrastructure teams across Australia and North America. tMinus1 led the cloud migration from a legacy hosting environment to AWS, re-architecting for multi-tenancy, security hardening and elastic scale.

The situation

Assignar's existing infrastructure was a single-tenant shared hosting environment that could not scale with customer growth and had no defined security boundary between tenants. Compliance obligations from enterprise clients required demonstrable isolation and audit-ready logging.

What we built

Full re-architecture onto AWS using ECS Fargate for workload isolation, RDS with per-tenant encryption, and a WAF configuration tuned to the application traffic patterns. Terraform modules ensured repeatable, auditable infrastructure. A phased migration plan delivered zero-downtime cutover over six weeks.

How we delivered it

Discovery and architecture design (weeks 1–2), Terraform build and parallel environment validation (weeks 3–5), traffic cutover and hypercare (week 6).

The result

Zero production incidents during cutover. Tenant isolation confirmed by third-party security review. Infrastructure cost reduced 28% versus previous hosting. Onboarding time for new enterprise clients dropped from four weeks to five days.