Tape

Observation-only equities-research terminals (US + Indonesia)

Solo developer

Two private financial-research web apps for US microcap biotech and the Indonesia Stock Exchange. Bloomberg-restrained and observation-only: zero buy, sell, target, or timing language anywhere in the product.

What I built

• 01Architected and shipped two private financial-research web apps end to end: Next.js 16 (Turbopack), React 19, Tailwind v4 and TypeScript front ends over a Python 3.13 FastAPI sidecar, a DuckDB cache and Neon Postgres, secured with Clerk auth.
• 02Engineered a multi-source, point-in-time ETL pipeline across SEC EDGAR, FINRA, Tiingo, IDX and KSEI/OJK under strict no-backfill and no-look-ahead correctness rules.
• 03Built a composite multi-factor radar scorer (catalyst, price, short, news, structure, dilution) and used walk-forward backtesting to distinguish where signal held from where anti-selection dominated, retaining the negative result rather than overstating model quality.
• 04Instituted a data-integrity regime using unit invariants and independent verification passes to catch foreign-net unit errors and false-green assertions before release.
• 05Shipped an observation-only intelligence layer with a forbidden-language linter, OpenAI synthesis and embedding-based retrieval, plus a WebGL/GLSL, GSAP and Three.js boot cinematic and two distinct accessible design systems.

Stack