Our promise

Finish your path and pass every gate, and you are ready for senior frontend or AI product engineer loops.

That is the whole promise. We do not guarantee a job, an offer or a salary — anyone who does is guessing. What we will do:

• Keep learning free, with no login wall. Your progress lives on your device.
• Cover the 496 concepts on our map, each with the same five steps, and map 819 real interview questions to the concept that answers them.
• Test every code example and source every fact.
• Only say “ready to apply” after you pass a full mock loop.
• Publish real outcome numbers once we have them, including the bad ones.

Who makes this

Engrain is made by ByteRush. Ads, when they appear, are only at the end of a page or in the side column, never inside a lesson, exercise or review.

Where we are

The concept map is complete. Concept pages are being written in batches; a page that is not ready yet shows exactly what it will cover. The skill map marks which concepts are ready.