The Staff Engineer's Path

A book about what senior individual contributors actually do in large organisations — the work that creates value when you no longer write most of the code yourself. Reilly, a principal engineer at Squarespace, describes three pillars of staff-level impact: big-picture thinking, execution of cross-team projects, and levelling up the engineers around you. The book is valuable precisely because this role is poorly defined at most companies, leaving staff engineers to either become shadow managers or retreat into isolated technical work, neither of which justifies the title. For product directors, it clarifies the engineering counterpart to their own role: the person whose job is to ensure that technical decisions across teams are coherent, even when no single team owns the problem.