Internal Developer Platforms (IDPs) like Humanitec enable self-service for software engineers, allowing them to manage their applications end-to-end and providing transparent abstractions for easy maintenance and consistent documentation. A senior backend engineer uses an IDP daily to manage infrastructure, application configurations, deployments, and roll-backs with ease, thanks to features such as automated deployment into the right environment, notification of new image builds, and dynamic creation of manifests at deployment time. The platform also provides a diff showing exactly what changed during deployment, checks resource dependencies, deploys apps into fresh environments in seconds, and allows for easy rollbacks and partial releases. Additionally, the IDP provides control and flexibility, allowing backend engineers to define baseline YAML files, update configs in a sustainable manner, and access infrastructure and resources directly through APIs.