A self-hosted internal management platform designed as a technical base for custom business applications and process automation. This DEV.to version is a short engineering note extracted from the case study, with the complete English page linked at the end. Stack at a glance Software, Web App, Node.js, React, Docker, PostgreSQL, Self-hosted. Why this matters Internal tools often start as spreadsheets, small scripts or isolated dashboards. That works for a while, then the data model becomes the real bottleneck. A self-hosted management platform is useful when the organization needs control over data, workflows, backups and future customization. Architecture notes Keep the domain model explicit before building screens. The UI should reflect operational workflows, not just database tables. Separate the application layer, persistence layer and deployment layer so the platform can evolve without rewriting everything.…