Notes from
the work.

Software, systems, and the things I’m learning along the way. From first principles to AI in production.

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All notes 2

A little theory. A lot of practice.

Paper charts with an olive scatter plot, histogram, and data table on a beige desk

Data9 min read

Distinguish empty, unknown, and not applicable data

A commute survey separates an observed zero, declined answer, not-applicable record, and collection failure. A worked analytical example with explicit assumptions and checked results.

21 Sept 2026

Foundation

Olive and charcoal server components connected on a warm beige background

Backend9 min read

Use primary keys and foreign keys to preserve an order

Model order identity, reject orphan references, inspect cascades and separate database relationships from the policy for deleting a paid order.

20 Sept 2026