With over 7000 microservices across more than 150 teams, Trendyol faced the challenge of reducing cognitive load for developers. To address this, the company built the Trendyol Builder Platform (TBP), an Internal Developer Platform (IDP) designed to simplify infrastructure and accelerate application delivery. Powered by KubeVela and OAM, and integrated with tools such as Argo Rollouts, FluxCD, and Prometheus, TBP enables fast, reliable application delivery with built-in templates, progressive deployment strategies (canary, blue-green), centralized observability, and robust config/secret management. TBP has proven to boost DORA metrics, improve developer productivity, and enhance application delivery maturity. This session will showcase how the platform reduces complexity, empowering teams to focus on innovation while setting new industry standards for application delivery at scale.