HaulLog — Django 5.2 backend for an ELD Trip Planner, powering a React frontend. It securely proxies the TomTom API for geocoding and truck routing, keeping the API key server-side, and runs a stateless, pure-Python FMCSA Hours of Service (HOS) simulation engine that generates a full day-by-day driving/rest/fuel timeline. No database is used — everything is computed per-request. Deployed on Render via Gunicorn, with four core endpoints handling key delivery, geocoding, routing, and trip calculation.