Cloud Migration Services for a Large Legacy Portfolio on AWS: The 4 Layers Enterprises Must Buy (and the One They Forget)

Large enterprise AWS migrations are presented as requiring four distinct service layers: AWS-native migration programs and tools, systems integrators for discovery and execution, independent compliance assessors, and a post-cutover runtime platform for operating applications. The account argues that organizations often overlook the fourth layer, leaving developers dependent on tickets and creating gaps in deployment governance after integrators depart. It recommends choosing migration approaches individually by application archetype using AWS’s seven Rs, generally rehosting low-change workloads, replatforming actively developed Java and .NET applications onto containers, limiting expensive refactoring, and considering retirement or SaaS replacement where appropriate. Governance controls such as multi-account structures, identity management, logging, guardrails, continuous compliance evidence, residency decisions, and a documented shared-responsibility model should be established before migration waves begin. Migration costs are characterized as being driven more by discovery, dependency resolution, licensing, dual-running environments, and long-term platform staffing than by AWS migration tooling itself. The piece positions Qovery as a bring-your-own-cloud internal developer platform for the runtime layer, contrasting it with DIY Kubernetes operations and multi-tenant PaaS offerings while emphasizing self-service deployments, per-environment access controls, managed upgrades, and retention of customer account ownership.

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