Aircraft engine manufacturers face growing challenges in incorporating nonlinear structural dynamics into the early design of bladed components. While prior work has largely centered on the prediction and characterization of nonlinear interactions, the current imperative—to avoid any design compromise that degrades the engine's environmental performance—is driving a shift toward the design of bladed components that are inherently robust to these interactions. Achieving this goal is hindered by both fundamental and computational barriers. Theoretically, no established counterpart to classical modal analysis exists in the nonlinear regime. Numerically, the fidelity requirements of industrial applications necessitate the use of full three-dimensional finite-element models, whose size and complexity render conventional time-domain analyses impractical. This talk addresses two enabling developments that mitigate these obstacles: (1) frequency-domain methodologies that deliver efficient and accurate numerical analyses of nonlinear bladed assemblies, and (2) a purpose-built blade parameterization framework that is embedded within a black-box optimization strategy, allowing robustness to nonlinear interactions to be treated as a design objective from the earliest stages.