System Design Interviews for Backend Engineers
Go from a blank whiteboard to a clear, defensible backend design with a repeatable interview process.
Explore the courseHi! 👋🏻 Here you'll discover learning paths to reach your full potential.
Never fail a technical interview again.
And, Take your system design skills to the next level!
Choose your next learning path
Each path solves a different preparation problem. Pick the one that matches what you need next.
Go from a blank whiteboard to a clear, defensible backend design with a repeatable interview process.
Explore the courseFind your knowledge gaps through focused, topic-by-topic interview practice.
Start practicingConnect replication, pooling, partitioning, sharding, failover, and scaling into one practical strategy.
Explore PostgreSQLSmall, focused experiences you can use immediately—before choosing a complete course or practice path.
Map your current gaps and decide what deserves your attention next.
Open roadmapSeven authentication architecture decisions with immediate feedback.
Start the labA Design Uber simulation that reveals where your approach breaks down.
Run the simulationInvestigate a suspicious payment through a production-style evidence funnel.
Open the RAG labHow the material is built
The same three principles shape the courses, interview questions, and free learning resources.
Start from the problem and constraints before introducing a technology or pattern.
Problem → constraints → optionsCompare alternatives and make the trade-off visible instead of hiding it behind jargon.
Options → trade-off → choiceTurn technical understanding into a clear answer you can defend under pressure.
Decision → reason → defenseWhat students say
Real comments from students and YouTube viewers—not anonymous marketing quotes.
I'm a PM for a fintech firm. This video is brilliant!! There were so many edge cases that you laid out very well and also explained industry standard solutions. Also, you've structured the video really well. Top class!!! Would've loved if you included DB design as well, but that'd probably be me asking for too much. Thanks again.

You're amazing bro, thank you so much for making these videos! I'm preparing for a senior engineering interview and haven't been feeling very confident about it. Your videos are really helping me build a framework for understanding things at a more high level. I appreciate your effort. Thanks again!

The way you explained the theory made it very clear, and the hands-on exercises, though short, were practical and effective.
Thank you so much for the effort you put into this video! Your explanation is incredible and the graphic is easy to understand 😊. I instantly subscribed.

Best video!! Explained everything I learned in 4 months in 24 mins

This video is very informative, straight to the point and so well done.
At first I was skeptical, but the more I watched, I learned very important patterns for designing a distributed payment system. well done!

The way the units are split favors advancing quickly. I am using it to prepare for a work interview.
Thank you for this video. Any System Designer or a Technical Architect can easily understand the effort and hard work to come up with such presentable content and sharing knowledge.

This was such a good tutorial for someone like me who is new to these concepts…
Short and to the point! In just 3 hours a very good, practice-oriented introduction to the most important tools with demonstrations in each section.
This is pure ambrosia. Ah, feed me more, feed me more. I'm savoring each video in the playlist, one at a time, to make it last as long as possible.

Not convinced yet? Here are even more testimonials.
Your instructor
I’m a backend engineer and educator with 14+ years of professional experience. I create the explanations and learning paths I wish I had when difficult concepts first appeared in interviews and production systems.
The goal is not to give you more material to collect. It is to help you make better technical decisions—and explain them clearly.
More about Lucian →Free reading
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