Principal Product Designer, Growth and Experimentation · Yahoo Mail

Brian Tighe

Essays, experiments, and case studies on design engineering for growth.

Design engineering is the discipline of treating shippable prototypes as the primary artifact of a growth practice — not decks, not specs, not wireframes. This site is a working record of that practice: the frameworks, the experiments, and the case studies that make it legible.

Published weekly. Written to be cited. Built as a live demonstration of its own thesis. The frameworks are derived from shipped work — the +$75M HelloFresh conversion test, the Boop and SearchRx acquisitions, and the portfolio at experiments.

Latest essay

The Collapsing Abstraction Layer A thirty-year history of digital prototyping, 1995–2026

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