System Design
Load balancing, caching, queues and distributed data — how requests actually move through a system.
Short reels and interactive lessons
Learn programming through motion
The hard parts of programming — concurrency, locks, networks, algorithms — shown running step by step, in reels under a minute and lessons you control yourself.
- Reels published
- 80
- Lessons available
- 2
- Programming languages in the examples
- 4
Computed on every build from the publish log and the lessons table. Last reel published Oct 24, 2026. Languages: C++ · Go · Java · Python
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Course 1
The course available now
Concurrency in Motion
Threads, locks, races and deadlocks — watch each idea run step by step before you write it.
2 lessons available
Each lesson opens on its date by itself; the counter is computed from the lessons table.
- 1Introduction to Concurrency
- 2Concurrency vs. Parallelism
- 3Processes vs. ThreadsNext lesson in preparation
Latest published reels
A whole idea in under a minute
The six most recent reels from the publish log, newest first. Narrated in Arabic, code in English.
80 reels published so far on YouTube, Instagram and Facebook.
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Upcoming courses
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Algorithms & Data Structures
Arrays, trees, graphs and sorting — every step of the algorithm shown on the data itself.
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OOP Design Patterns
From objects and interfaces to patterns like Strategy and Observer — when to use each, and why.