Full-Stack Developer & DevOps Engineer

Perry van der Klooster

Building algorithmic trading systems, security research tools, and real-time platforms. Python, TypeScript, React, and infrastructure.

Selected Projects

Reading App 2026

Glide

Focus-first reading app that transforms text into a guided, distraction-reduced experience. RSVP display, ambient noise synthesis, dyslexia-friendly fonts, and intelligent content extraction from any URL.

Next.js TypeScript React Tailwind Web Audio
Real-Time Scraping 2025

Efteling Hotel Scanner

Live availability and pricing dashboard for Efteling hotels and restaurants. WebSocket-powered real-time updates, SMS and Telegram price alerts via Twilio, admin panel with auth, and historical price tracking.

Node.js Express WebSocket SQLite Twilio
Security Tooling 2025

Domain Security Checker

DNS validation engine performing comprehensive domain security audits — DNS records, TLS certificates, WHOIS data. Includes a lookalike domain scanner for phishing detection across typosquat permutations.

TypeScript React Express DNS/TLS
Real-Time Scraping 2025

Disney Price Tracker

Continuous price monitoring for all 8 Disneyland Paris hotels. Real-time web dashboard with charts, calendar views, price alerts via Telegram and SMS, and historical trend analysis across room types and seasons.

Python Flask BeautifulSoup SQLite Telegram API
Analytics Platform · Open Source 2025

NPM Analytics Dashboard

Real-time visitor analytics built on nginx proxy log parsing. Interactive world map with MaxMind GeoIP, live WebSocket activity feed, traffic timelines, and per-domain breakdowns. Self-hosted alternative to third-party analytics.

React FastAPI WebSocket Leaflet GeoIP
Full-Stack Platform 2025

Stock Portfolio Tracker

Real-time portfolio management with live WebSocket price streaming via Finnhub. React frontend, FastAPI backend, PostgreSQL. 18,000+ lines of code across three containerized services with sub-second refresh intervals.

React TypeScript FastAPI PostgreSQL WebSocket
AI Trading 2025

AI Stock Trader

Autonomous stock trading system powered by Claude AI. Analyzes technical signals and executes paper trades with confidence scoring, position sizing, and risk controls. Tracks equity curves, drawdown, Sharpe ratio, and win rate across multiple independent trader instances.

Python FastAPI Claude API PostgreSQL APScheduler
Algorithmic Trading 2026

Kalshi Weather Bot

Autonomous prediction market trader. Multi-API weather ensemble (NWS, ECMWF, GFS, OpenWeather) with weighted model averaging, fee-adjusted Kelly sizing, convergence tracking, and real-time risk management with city correlation matrices.

Python AsyncIO SQLAlchemy APScheduler
Security Research 2025

BIMI Tracker

Certificate transparency log monitor tracking BIMI adoption across the internet. Multi-language system with a Rust CT log scraper, Go certificate parser, TypeScript API, React dashboard, and PostgreSQL persistence.

Rust Go TypeScript React PostgreSQL
Security Tooling 2025

GitHub Secret Scanner

Real-time scanner detecting 30+ types of exposed API keys on GitHub. Validates findings against live APIs, scores severity, identifies bug bounty eligible repos, and serves results through a live monitoring dashboard.

Python SQLite GitHub API Regex
AI Automation 2025

Trendsites

Automated pipeline that scrapes Google Trends daily, generates SEO-optimized websites with AI content, and deploys them. Competitive analysis engine, Celery task queue, and multi-environment deployment to Vercel and GCP.

Next.js FastAPI Celery PostgreSQL Redis
Financial Analytics 2025

Correlation Tracker

Monitors commodity-currency-stock relationships using rolling correlation windows (30/60/252 day). Z-score analysis detects when correlations break from historical norms. Discord alerts and a color-coded CLI dashboard.

Python Flask Yahoo Finance SQLite
Network Security 2025

Proxy Scanner

High-performance async network scanner for SOCKS4/5 and HTTP proxies across IP ranges. Nmap vulnerability integration, persistent storage, live web dashboard, Telegram geo-tagged alerts, and resume-on-restart capability.

Python AsyncIO Nmap SQLite Telegram API

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