Engineers can utilize controlled experimentation with feature flags to test and optimize infrastructure decisions, ensuring robust and performant applications without affecting users. Infrastructure experimentation extends beyond typical product management roles, covering foundational decisions like database selections and caching strategies that impact performance, scalability, and reliability. By experimenting directly in production using feature flags, teams can gather real-world data, reduce uncertainties, and safely validate critical infrastructure changes. This approach allows for gradual rollouts, safe rollbacks, and fosters a culture of continuous experimentation, helping engineers confidently make data-driven decisions and improve system reliability. Feature flags enable controlled rollouts and quick adjustments, mitigating risks associated with infrastructure changes, while tools like Harness Feature Management & Experimentation provide comprehensive support for these processes.