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Think like a senior engineer, a few minutes a day.
Short daily lessons that build understanding from the ground up, taking you from junior to senior judgment.
The path
One path: from how it works to how to decide.
Every step is a real situation, not a definition.
1 / How it works
One query took 8 seconds
You learn: indexes
2 / Build it right
The user clicked Pay twice
You learn: idempotency
3 / Keep it running
The cache expired, and the site went down
You learn: cache stampedes
4 / Judge it
The AI's code passed the tests. Is it right?
You learn: reviewing code
How it teaches
Understanding first, always.
One concept a day, as a real situation
Every lesson starts with something going wrong: the payment ran twice, the page got slow. The concept arrives as the fix.
Real outage stories
You see how real systems fail and why the fix works, with numbers that make the scale feel real.
Understand it, then judge it
Know what the code does and why it works, then weigh the trade-offs behind every "it depends". No memorized answers.
Watch
A taste in sixty seconds.
New clips every day: Instagram @duckstreak, TikTok @duckstreakapp and YouTube @duckstreakapp.
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One email when DuckStreak launches. No spam, and you can leave any time.