SDT - System Design Trainer

Wave 1 complete | Wave 2 launch 15.03 (50 seats only)

Can you build Rate Limiter?

Code it. Break it. Fix it. Repeat.

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System Design Trainer

Terminal app and platform for learning high-load patterns through hands-on coding challenges.

Code production-grade patterns in Go (your own editor, no sandbox)
Run against scenarios with hidden failure modes
See where your implementation breaks and why

Book your seat in Wave 2 →

👇 Watch 90 seconds demo

New way to level up. New way to have fun.

SDT combines the hands-on practice of side projects with the structured learning of courses AND fast automated validation you don't have to write yourself.

Feature	SDT	System Design Course	Algorithm challenges	Pet Project
Problem level	🤟 system/service	🤟 system/service	function	🤟 system/service
Coding level	🤟 implement component	no coding	print output	implement everything
Observability type	🤟 implement metrics	in theory	not needed	write your own
Automated testing type	🤟 multiple parallel request tests	quiz based	👍 single-thread	write your own
Feedback loop speed	🤟 ~1 second	wait for human	🤟 ~10 seconds	manual testing
Test edge cases	🤟 curated list	in theory	🤟 curated list	figure out yourself

Join Wave 2: 50 Seats

Opening: 15.03.2026
Waitlist members notified 1 week before launch

Book your seat in Wave 2 →

🆓 Practice for free

Free test cases for Request Batching and Read-through Cache. No pressure to upgrade.

Wave 2 exclusive

💰 Founders pricing

~~$400~~ $200 / year for extra challenges. 6-month money-back policy.

🗣️ Gifts for friends

Share special privileges with your friends via special invite codes. Gift them priority support, waitlist skip, or discount.

❤️ You are first

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

Don't worry

🔒 No spam. We send you only 1 email when you get invited.

🔒 No credit card required.

🔒 Free tier challenges stay free forever.

Frequently Asked Questions

Do I need to be a Go developer to try this?

Basic Go knowledge helps, but if you know any language with concurrency (Java, C#, Rust), you'll pick it up fast. Each challenge includes interface templates.

Will this help with system design interviews?

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

How is this different from LeetCode?

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

What if I get stuck?

Wave 2 members get priority support + community Discord access.

Can I practice for free?

Yes. 2 challenges stay free forever. No credit card required.

Questions? Email me at rusinikit@gmail.com or @rusinikita