The coding gym for Go professionals.

Today's exercise: Basic functionality

Code. Break. Fix. Repeat.

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Your training program

SDT is a terminal-based gym where you implement high-load patterns in Go and run them against real failure scenarios.

  • Pick a pattern. Implement the interface in your editor.
  • Run the workout. Your code hits concurrent load, failures, edge cases.
  • See what broke and why. Fix it. Run again.
Enter the Gym →

👇 Watch 90 seconds demo

Not another course. Not another side project.

SDT gives you what courses and pet projects can't — fast reps with instant feedback on production-grade patterns.

Start training now. No waitlist.

macOS (Homebrew)

brew install rusinikita/tap/sdt

Other platforms

curl -sSfL https://highloadapp.com/install.sh | sh

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Priority support. New releases first. Feature requests. Direct contact with founders.

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🔒 Free workouts forever.

What does a workout look like?

You get a Go interface and a failing test suite. Implement the pattern, run the tests, see what breaks. Fix and repeat until all cases pass.

Will this help with system design interviews?

Yes. 80% of senior+ interviews include coding a distributed system component. SDT gives you reps on the exact patterns asked in FAANG interviews.

How is this different from LeetCode?

LeetCode = algorithms (single function). SDT = system design (concurrent components). Different muscles, different interviews.

What if I get stuck?

Stuck? Reach out — we'll help.

Can I train for free?

Yes, just install the CLI and start. No subscription, no payment.