AI can write the code.
It can't make you think.
Every prompt you outsource is a skill you don't build.
Linfy is the training ground where you do the reasoning — and become the engineer AI can't replace.
You solve it. AI reviews it.
No autocomplete shortcuts. You reason through every problem, push real code, and get feedback that sharpens your judgment instead of replacing it.
Pick a real problem
Choose a track — rebuild a core library or ship a full product. No hand-holding, no shortcuts.
Reason it out & push
Work through the solution yourself in a real Git repo. Every push runs the full test suite.
Get feedback that teaches
AI reviews your work and explains the why behind every fix — so the lesson actually sticks.
Think before you type
Test-driven development forces you to define the problem before you solve it — the opposite of letting autocomplete guess. It's the discipline that builds real engineering judgment.
Define the Problem First
Write a test that describes the behavior you want before any code exists. This forces you to think, not autocomplete.
Solve It Yourself
Write the minimum code needed to make the test pass — by reasoning through it, not guessing what a model would suggest.
Refactor with Confidence
Clean up your code knowing your tests have your back. Improve the design without breaking what works.
Built to make you think, not depend
Every feature is designed to build judgment you keep — not a dependency you rent from a model.
Real Terminal, Real Tools
Work in an actual dev environment with Git, npm, and your editor — no sandbox that thinks for you.
Git-Based Workflow
Push code to real repositories. Get feedback from automated CI pipelines, not a chatbot guessing your intent.
Production-Grade Code
Write code that meets industry standards with linting, testing, and code review you actually understand.
Feedback That Explains Why
See test results in real time and learn why your reasoning held up — or where it broke down.
Track Your Progress
Build a portfolio of problems you solved yourself. Show employers judgment, not just output.
You Write Every Line
No passive tutorials, no copy-paste from a model. Every project forces you to solve it yourself.