Engineering notes, product decisions, and curriculum thinking from the team building this.
Every "Check Solution" button on every learning platform hides a hard infrastructure problem. Here is how we isolate, time-box, and sandbox untrusted code at scale.
We replaced a flat lesson list with an interactive node graph. Here is the design reasoning, and why D3 — not Recharts — was the right tool for exactly one chart in our entire app.
Every question in our interview prep bank goes through a three-stage review before it is published. Here is the process, and why we rejected our first 40 drafts.
No data science detour. No mobile track. No Python-for-everything course. Here is the case for staying razor-focused on two disciplines, done with real depth.
Our AI hint system uses the Socratic method by design — it will not write code for you, even if you ask twice. Here is the prompt engineering behind that restraint.
