Series intro. I'm a non-CS solo dev who built and shipped a production stock screener almost entirely by "vibe coding" with an AI agent. The site works. Users use it. And it has cost me, in real ways, every shortcut I took. This series documents those costs honestly — what broke, why, what I shipped to fix it, and what I'd do differently. Part 1 is the one that still stings: a server OOM that killed my SEO right as Google was starting to notice me.
What I built
StockDigging is a free stock screener and ranking site covering Korean (KOSPI + KOSDAQ) and US (NYSE + NASDAQ) markets — about 5,600 active tickers in total. Every valuation metric (PER, PBR, market cap, etc.) is recomputed daily from that day's close × the latest financials. No stale snapshots, no aggregator middlemen.
The stack is conventional indie-dev fare:
Frontend: Next.js 16 (App Router, Turbopack), React 19, TypeScript
