FinOps, as defined by the FinOps Foundation, is a cloud financial management discipline that facilitates collaboration among engineering, finance, technology, and business teams to make data-driven spending decisions, thereby maximizing business value. This approach integrates financial best practices into the development process, encouraging developers to be mindful of resource usage at various stages, ultimately leading to significant operational expense savings and better growth forecasting. In smaller organizations, developers often manage cloud costs directly, while larger entities typically assign this responsibility to a central IT or Cloud Platform team. The practice of FinOps involves not only reactive optimization, where organizations review and adjust costs based on bills, but also a proactive approach that provides real-time feedback on how architectural changes impact costs. Pulumi, an infrastructure as code platform, facilitates both reactive and proactive cost management by enabling the design of guardrails for resource provisioning, continuous drift detection, and policy enforcement. Implementing a Tag Policy is essential for cost allocation, and automation tools such as Pulumi's CrossGuard and Automation API further enhance governance by enforcing organizational standards and enabling streamlined processes. The adoption of FinOps practices can lead to substantial financial optimization through strategic sourcing and discount negotiations with cloud vendors, ensuring that cloud operations align with business objectives and financial constraints.