Build the Skills
AI Can't Fake
Master small, deep concepts the DIY way: first by hand, then with AI agents.
- Fundamentals
- Code it yourself
- Code with AI agents
With a human mentor at every step
Master small, deep concepts the DIY way: first by hand, then with AI agents.
With a human mentor at every step
CodeDIY.io turns learning into doing — a guided path from your career goal to hands-on, certified, interview-ready skills.
Step 1 of 4
Pick a career track and tell us your goal.
Pick a real task, build it with guidance, and get it reviewed by a mentor — step-by-step learning with personalized feedback and instant AI support.
Powerful features designed to help you master skills faster and more effectively
Data structures and algorithms are what deep interviews test — and the part agents can't learn for you. A new problem every week, with a DIY solution.
Learn alongside peers in live sessions — explaining your reasoning out loud is the fastest way to deepen it.
Keep your daily learning on track with the TODO tracker — small steps, done consistently.
You learned the hard way why systems break at scale. Help the next generation of engineers build that judgment — before an AI agent ships their first outage. Join CodeDIY.io as a mentor.
Here, you'll find answers to common questions about our platform's tasks and code reviews.
AI generates code, but engineers are accountable for it — its performance, its security, and whether it holds up at scale. Deep technical interviews test exactly that judgment, and an agent cannot sit the interview for you. CodeDIY tasks build the understanding that lets you direct AI confidently and catch it when it is wrong.
Yes. The goal is to learn to direct and verify AI, not to avoid it. Mentors review whether you understand what you built and why — so use AI like a professional would: as a tool whose output you check, not a shortcut you trust blindly.
Premium is $15 per month, with an annual billing option available. You can start on the free Starter tier, which includes hands-on tasks and AI features within monthly usage limits, and upgrade whenever you need more capacity and the more powerful AI models.
Upgrades are currently handled by our team. Submit an upgrade request from the Upgrade page, and we will email you an invoice with the available payment options. Your Premium access starts as soon as the payment is confirmed.
Onboarding starts on your dashboard: choose your growth areas and goals, and create a learning plan to get recommended tasks, knowledge blocks and microcourses. While you work, the AI Coach answers questions instantly and your assigned mentor guides you through each task. For account or billing questions, contact our support team.
Assessments are curated by the CodeDIY team so they reflect what real technical interviews test. To practice a specific interview skill, the AI Interview Coach has a library of competencies to choose from, with instant feedback on every answer.
CodeChallenges are our weekly data structures and algorithms problems — the core of deep technical interviews. Each week you get a new curated problem to solve yourself, followed by a detailed DIY solution. You can try them with a free one-week trial.
Start with one task and build skills that outlast the next AI tool — with mentors reviewing your code and design along the way.