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.
Server room with rack servers

Platform demo

See how it works

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

Workspace preview coming soon
Developer desk with code editor

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 →
Cozy café with laptop

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

Test Results

Test results screenshot

Train station waiting area at night

^ this is what it actually looks like

Built for devs who actually code.

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

the actual IDE ↓

Challenge Page

Challenge page screenshot

Challenge

Full VS Code engine. Multi-file, IntelliSense, syntax highlighting, integrated terminal.

Profile Dashboard

Profile dashboard screenshot

Dashboard

Track progress, streaks, submission history. Pick up where you left off.

Rooftop coding desk with city lights at night

the feedback loop

Not just “did it pass.”
Did you do it right?

AI reviews your code, after you write it

Once you pass the tests, AI analyses your implementation for security, readability, and best practices.

Build muscle memory, not dependency

The difference between AI helping you learn and AI doing your work.

Pro: follow-up questions on feedback

Ask the AI reviewer why it flagged something. Helps you actually understand the issue instead of just fixing it.

AI Code Review

AI code review screenshot

01
The point

At work, AI may write your code.
You still ship it.

A senior tears your PR apart. AI can’t help you there. You shipped code you can’t actually explain. Here, you get the reps. Build a feature by hand. Watch where AI output bends wrong, because it’s usually wrong in ways that don’t throw errors. Do it enough times, and you start feeling bad code before you type it. Then you’re directing AI, not apologizing for it.

  • Build real features by hand. Know what good code actually looks like.
  • Get AI reviews that land like the senior feedback you usually dread.
  • Ship code you can defend. Direct AI like someone who knows the difference.
1

What a review catches:

  • XSS + injection holes
  • edge cases you didn’t think about
  • bad naming + readability
  • anti-patterns you didn’t know you were using
PR review hurts less when you’ve already heard it here.
02
Pick your battle

Real challenges.
Any stack you want.

Two modes. Frontend challenges show you a reference image of the finished UI. Rebuild it in whatever framework you’re learning. Functional challenges hand you a behavioral test suite. Solve it in any language you want, with whatever libraries you pull in.

  • Pick the language. Pick the framework. That’s how you practice in real life anyway.
  • Small enough to finish in a sitting. Real enough to actually teach you something.
  • Requirements are spelled out upfront, the way a real ticket works.
2

Two ways to practice:

  • Frontend: reference image → rebuild it (React, Vue, Svelte, whatever)
  • Functional: test suite → solve it (any language, any deps)
  • You choose the stack. We verify the behavior.
Build it your way. Tests don’t care about the how.
03
The IDE

Monaco editor.
Same engine as VS Code.

You shouldn’t have to learn a new editor just to practice. Monaco is the engine VS Code ships with. Your autocomplete works. Your keybindings work. All that muscle memory you already have shows up from the first keystroke.

  • IntelliSense autocomplete. You write code the way you already do.
  • A real file tree, not a single-file textarea. Build multi-file projects like the real thing.
  • Create, rename, organize. Shape the project whatever way your solution needs.
3

What you get:

  • IntelliSense + autocomplete
  • multi-file project tree
  • all the shortcuts you already know
  • opens to the files that matter
Your VS Code muscle memory works from day one.
04
Real environment

A real machine.
Not a sandbox.

Every session spins up its own isolated Linux box. Bash, the full toolchain, six languages pre-installed. Install packages. Run servers. Break things if you want. It’s your machine for the session.

  • Install any deps you need. npm, pip, go modules, apt, whatever the challenge calls for.
  • Run servers. Hit endpoints. Debug with real tools, not some stripped-down console.
  • Isolated per session. Experiment freely without breaking anything that matters.
4

Pre-installed:

  • Node 20, Python 3.11, Java 17, Go 1.24, C
  • npm, pip, Maven, go modules
  • curl, wget, git, gcc, make, full bash
  • install anything else at runtime
Need something not listed? apt install it.
05
No deploy scripts

If it runs in terminal,
it passes on submit.

Most platforms make you write a startup script, spec out your server, and pray the rig matches. Not here. We figure out how your app starts. We install your deps. We run the tests. No config. What works in your terminal is exactly what gets tested.

  • Auto-detects your server, your deps, your entrypoint. No config files to write.
  • Same environment runs the tests as ran your code. No “works on my machine” surprises.
  • Submit as often as you want. No penalty. Real error messages every time.
5

How submit works:

  • 1. Build and test in your terminal until it works
  • 2. Hit submit. We spin up the same environment.
  • 3. We detect your setup, install deps, run the tests
  • 4. Same result. Every time.
What you test in the terminal runs on submit. No setup required.
06
Go Pro

Pro opens the door
to the companies hiring through RealDev.

Pro is $15/month today. More reviews. Forever history. Unlimited follow-up Q&A with the AI reviewer. In 2026, RealDev becomes an interview platform. Companies hire through the work you ship here, not through a resume. Pro users get first access to those partners when they come online.

  • Enough reviews to get feedback on every single challenge you finish.
  • Full solution history, kept forever. A portfolio companies can actually see.
  • First look when 2026 hiring partners go live. Skip the cold-application grind.
6

Free vs Pro:

  • 5 reviews/mo → 300 reviews/mo
  • 30-day history → forever
  • no follow-ups → unlimited Q&A
  • → early access to hiring partners
$15/month. Cancel anytime.
07
Get started

Start tonight.
Free. No credit card.

Sign up with Google or email. No onboarding tunnel. No trial timer. No credit card. The free tier has enough to tell you if this is the place for you. You can be inside a challenge in under a minute.

  • Everything saves automatically. You never lose work between sessions.
  • Your streaks and submission history are yours from day one.
  • The free tier is built to actually work. Not to trap you into upgrading.
7

What you get, free:

  • full access to every challenge
  • 5 AI code reviews a month
  • 30-day submission history
  • no credit card, no trial timer
Sign up takes 10 seconds. Try a challenge tonight.
08
What’s next

Built in public.
Here’s what’s shipping.

RealDev is moving fast. The roadmap is public because the next features are shaped by what you ship and what you ask for. Here’s what’s landing.

  • System Design challenges with AI feedback on your trade-offs
  • Debug-the-codebase mode. Finding bugs is a skill most platforms ignore.
  • GitHub integration so your work here shows up where employers actually look
  • Curated learning paths so you stop guessing what to practice next
  • Pair-with-AI mode (Pro). Interviewers see how you actually work with AI, and you get feedback on your prompting.
  • Partner companies hiring directly through RealDev in 2026. The bigger shift in how engineers land jobs.
8

Shipping next:

  • System Design w/ AI trade-off feedback
  • Debug-the-codebase mode
  • GitHub profile integration
  • Curated learning sequences
  • Pair-with-AI mode + prompting feedback (Pro)
  • Partner companies hiring through RealDev (2026)
Got something to add? We read every email.

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.

  • Unlimited challenge attempts
  • All 6 languages
  • Full cloud IDE & environment
  • Real test suites
  • 30 daily submissions
  • 5 AI code reviews/month
  • 50 script generations/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
  • 1000 script generations/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.