Lumen is the operator console for a small analytics startup. It replaces a set of scattered SQL notebooks with a single, fast, keyboard-driven UI where the team can inspect customers, replay events, and tune feature flags without leaving their editor mindset.
The problem
The team was answering every customer question by hand-writing SQL against a production replica. It was slow, risky, and nobody wanted to onboard the next hire into it.
What I built
A typed tRPC layer on top of the existing Postgres schema, a set of composable table primitives, and a command palette that covers 90% of day-to-day actions. Every mutation is audited and reversible.
Outcome
Support response time dropped from hours to minutes, and two non-engineers on the team now resolve customer data issues on their own.