01 · Expertise

Cloud architecture

Account, network, identity, and service boundaries designed as one operating system.

Cloud architecture is not a collection of provider services. It is the set of boundaries that determines who can change a system, how failure moves through it, and what evidence exists when something goes wrong.

We work from the constraints outward: regulatory obligations, availability targets, ownership, existing workloads, delivery paths, and the changes the organization must be able to make next. The result is a target architecture expressed as decisions, diagrams, and implementation-ready work.

Architecture carried into production

The people who establish the target remain involved as account structures, network paths, identity controls, and migration stages are implemented. Assumptions are tested against the live system and corrected while the work is still reversible.

FIG. 01Cloud architecture · system boundariesCurrent
Cloud architecture · system boundariesCurrent cloud estate with shared paths and one marked failure route between production and a legacy account.shared accountproduction accountlegacy account×identityshared rolesnetwork hubimplicit routesproduction platformcritical pathlegacy workloadunbounded egress
Subject
AWS · accounts · networking · IAM
Reading
Shared identity, network, and workload paths cross account boundaries without a single ownership model.
Legend
Solid: active · dashed: planned or failed · ×: failure
Representation
System model, not a client architecture.
01 · Cloud architecture · system boundaries

Start with the system

A difficult infrastructure problem?

The first conversation is about the architecture, the constraints, and what makes the problem difficult.

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