How HRC TECH keeps paid course content from leaking
Token-gated streaming, hashed access tokens and per-lesson watermarks: the layers that protect video and PDF lessons.
6 Oct 2026 · 1 min read
- ASP.NET Core
- Security
- FFmpeg
Engineering notes
How the hard parts work
Short write-ups on the engineering behind my projects: securing paid content, handling payments safely and building APIs.
01 02 Making Stripe webhooks safe to retry in ASP.NET Core
Verify the signature, remember every event ID, and never enrol a student twice.
24 Sept 2026 · 1 min read
- Stripe
- Payments
- ASP.NET Core
03 Building the Shop-Zone REST API with Express, JWT and MongoDB
MVC folders, bcrypt, JWT middleware and admin-only routes in a first Node.js backend.
20 Jun 2026 · 1 min read
- Node.js
- Express
- MongoDB