Arindam Paul

Engineering Stories

Blog

Twenty years of building systems across high-frequency trading, classical music technology, emergency healthcare, and industrial automation. These are the stories that don't fit on a resume.

Apple Acquisition

How a Rare Book Became Apple's Most Beautiful App

The origin story of Apple Music Classical — and why the Primephonic metadata database we built was different enough from every other music catalog that Apple acquired the whole company to get it.

Classical Music Metadata

Parsing the Da Capo Catalog

How we turned 1,399 pages of printed classical music compositions into a searchable database — and why OCR, hand-tuned heuristics, and a lot of domain knowledge were the only way through.

High-Frequency Trading

What It's Like to Build Systems That Trade Billions

Goldman Sachs reconciliation systems, the ETF desk launch, and eight years of building infrastructure where a single bug costs more than most software engineers earn in a decade.

Career

Twenty Years, Three Industries, One Engineer

From industrial automation to trading floors to Apple Music. What crossing industry boundaries actually teaches you — and why the skills that transfer are never the ones you expect.