I build full-stack tools with strong backend foundations — APIs, automation systems, and data-driven workflows that are reliable, testable, and easy to use.

• FastAPI
• PostgreSQL
• Redis
• Pytest

A pluggable authentication backend supporting JWT, session auth, OAuth, two-factor authentication, refresh token rotation, and role-based access control.

• Designed a pluggable auth architecture using the Strategy pattern — JWT and session auth share one interface and swap via configuration, without touching route handlers.
• Implemented refresh token rotation with reuse detection and token-family revocation.
• Built TOTP two-factor authentication with QR enrollment and hashed backup codes.
• Added Redis-backed account lockout before database access to reduce brute-force load.

• JavaScript
• CSS3
• Python
• GitHub Pages

A single-page web app that turns any letter input into real English words, then maps each letter to a publicly traded company — the same way FANG stands for Facebook, Amazon, Netflix, Google. Zero dependencies, no framework, no backend.

• Built a bitmask matching engine that encodes each word as a 26-bit mask, scanning 8,700+ words in under 1 ms with a single AND-NOT operation per candidate.
• Implemented smart company assignment so repeated letters get distinct companies, with per-letter swap buttons and shuffle for exploring alternatives.
• Designed a frequency-ranked wordlist pre-sorted by Google Trillion Word Corpus data — array index doubles as recognizability score, eliminating a separate scoring model.
• Shipped a polished finance-dashboard UI with staggered animations, S&P 500 filtering, shareable URLs, and clipboard export — all in ~110 KB of vanilla JS with no runtime dependencies.

• React
• Python
• FastAPI
• PostgreSQL
• Pytest
• Docker

A full-stack dashboard for running portfolio optimization models and visualizing risk, allocation, and historical stock data.

• Implemented Mean-Variance, Kelly, and Vol-Targeting optimization workflows.
• Stored and queried historical stock price data in PostgreSQL.
• Containerized the full app with Docker Compose for local orchestration.
• Built React and Plotly views that make quantitative outputs readable.