Category

Deep Dives

Long-form engineering write-ups: architectures, trade-offs, and the data behind the decisions we shipped.

2026-05-12 Testing a social app that has no users yet Proximity discovery, feed ranking, k-threshold suppression — every core feature of Hookay depends on crowd behavior, and our crowd doesn't exist yet. How we build and test a location-based social product pre-launch: synthetic populations, simulated cities, and the bugs only fake people can find. Deep Dive