FullStackAlchemy – Portfolio & Blog by Javid Lone | Full Stack Engineer, iOS App Developer and UI Engineer https://www.fullstackalchemy.com/blog FullStackAlchemy is the digital studio and blog of Javid Lone – a full stack developer and UI engineer specializing in TypeScript, React, and UX-centric web development. Showcasing modern web apps, portfolio projects, and technical deep dives. en-us hi@javidlone.com (Javid Lone) hi@javidlone.com (Javid Lone) Tue, 01 Sep 2026 00:00:00 GMT https://www.fullstackalchemy.com/blog/data-systems-engineering-part-1-bronze-silver-gold Data systems engineering, part 1: from raw order rows to trusted revenue https://www.fullstackalchemy.com/blog/data-systems-engineering-part-1-bronze-silver-gold A local DuckDB experiment that turns ecommerce CSV files into validated Silver data, quarantine records, and trusted Gold revenue while making grain, duplicates, nulls, and idempotency observable. Tue, 01 Sep 2026 00:00:00 GMT hi@javidlone.com (Javid Lone) data-engineeringsqlduckdbdata-qualitydata-platform