Coding desk with city skyline at night
Real Software Engineering Practice

Code without AI.
Think for yourself.

Bite-sized coding challenges you finish in 20–30 minutes. Real Docker environments, real test suites, real feedback. No AI hand-holding.

20–30

min per challenge

6

languages supported

✓

real test suites

20–30 min challenges
Docker containers
Real test suites
AI code review (after you submit)
No AI training wheels
Released March 2026. Already used by hundreds of developers and students daily.
Vertical split scene — night cityscape with park bench above, underground server cave below

Platform demo

See how it works

Watch a challenge from start to finish in under 2 minutes.

Workspace preview coming soon

the problem

AI is dulling your critical thinking.
The research agrees.

Your brain needs the reps

When AI writes your code, you skip the part where understanding forms. That struggle is the workout. Without it, you’re watching someone else lift weights.

Sharpen your edge, not replace it

The developers who’ll thrive with AI are the ones who can think without it. RealDev keeps your critical thinking sharp so you’re more dangerous when you do use AI at your job or internship.

20 minutes of real coding

No hours of setup, no scope creep. Pick a challenge, open the IDE, and ship something that passes real tests. Every session leaves you sharper.

0%of developers using AI tools reported decreased ability to write code independently after 6 months. GitHub survey, 2024

MIT · 2024

“AI assistance improved short-term productivity but correlated with reduced problem-solving depth and increased dependency over longer periods.”

Read the research →

Harvard · 2025

“Professor Avi Loeb observed colleagues losing cognitive abilities from excessive AI use, comparing it to muscle loss from prolonged bed rest.”

Read the research →

how it works

20-minute challenges.
Not 2-week side projects.

Pick a challenge, open the IDE

Cloud-based Docker containers with everything pre-installed. No local setup. Start coding in seconds.

Submit and get instant feedback

Real test suites validate your code. Then AI reviews your implementation for quality.

The old way
RealDev
Think of a project idea
Pick a focused challenge
2 hours setting up tooling
Open IDE, start coding
Get stuck, ask ChatGPT
Work through it yourself
“It works” (maybe)
Structured tests verify all requirements
No feedback on quality
Line-by-line AI code review
JavaScriptTypeScriptPythonGoJavaC

what the product actually looks like

Built for devs who actually code.

Not another tutorial platform. A real development environment in your browser.

Challenge

Challenge Page

  • Full VS Code engine with IntelliSense and multi-file projects.
  • Integrated terminal, six languages pre-installed, real toolchain.
  • Requirements panel and setup instructions kept visible while you build.
Challenge solve page with VS Code editor, file tree, requirements, and tests

Simple pricing

Start free. Go Pro when
you’re ready.

No trial periods. Free is real. Pro is for when you want to go deep.

Free forever
$0/ month

Real challenges, real tools. No credit card.

  • All 6 languages
  • Full cloud IDE & environment
  • Real test suites
  • 30 daily submissions
  • 5 AI code reviews/month
  • 4 reference hints/month
  • 30-day submission history
Pro
$15/ month

For developers serious about building real skills.

  • Everything in Free
  • 500 daily submissions
  • 300 AI code reviews/month
  • Unlimited reference hints
  • Follow-up Q&A on reviews
  • Full submission history
  • Early access to new features
  • Priority support

New day. New skills.

Stop prompting.
Start thinking.

The best time to build real skills was before AI took over.
The second best time is right now.