What happens when you click "Buy Now" on Amazon?
This is what backend engineers build.
You
Click 'Buy Now'
Browser
Sends Request
Server
Processes Order
Database
Stores Data
Done!
Order Confirmed
You
Click 'Buy Now'
Browser
Sends Request
Server
Processes Order
Database
Stores Data
Done!
Order Confirmed
You click the button on Amazon
Not just theory. Our built-in Python and SQL environments let you code along with every lesson.
New to coding? Start here. No downloads. No setup. Just start learning.
input() always returns a string, even if the user types a number. Use int() to convert to integer, float() for decimals.
Convert the string "100" to an integer, add 50 to it, and print the result.
1style=style="color: #4ade80">"color: rgba(style="color: #fb923c">255, style="color: #fb923c">255, style="color: #fb923c">255, style="color: #fb923c">0.style="color: #fb923c">4)"># Convert string to number2text = style="color: #4ade80">"style="color: #fb923c">100"3number = style=style="color: #4ade80">"color: #a855f7">int(text)4result = number + style="color: #fb923c">505style=style="color: #4ade80">"color: #a855f7">print(result)
Engineers at these companies started exactly where you are
No jargon. No assumptions. Just clear explanations that build your confidence from day one.
Day 1 answers the question everyone's afraid to ask. We explain what backend actually means, why it exists, and where you fit in - using analogies anyone can understand.
What actually happens when you type a URL. Finally explained clearly.
It's just software, not magic. We'll prove it to you.
Where your data actually lives and why it matters.
How apps talk to each other. The menu analogy that makes it click.
See all 6 domains of backend engineering and where you'll grow.
What to expect on day one. No more mystery about the job.
Read at your pace. No 40-minute videos. Reference forever.
End each day with something concrete to show for your effort.
This curriculum is specifically designed for people starting from scratch.
Most developers hit a ceiling. They can implement features but struggle to architect solutions. We'll change how you think.
Understand how systems actually work under the hood
Design for scale from day one
Build secure, production-ready systems
Day 12: Designing scalable system architecture
Every successful backend engineer was once exactly where you are now.
Each day includes a lecture, framework, worked example, and deliverable. Read in 30 minutes, apply in your own time.
Join thousands of developers who've transformed their backend engineering skills.
“I was a teacher for 8 years. Everyone told me I needed a CS degree. After Backend OS, I understood more than bootcamp grads who'd been coding for months. I got my first backend job 4 months later.”
“Bootcamp taught me to copy code. Backend OS taught me to think. Day 6 when I saw all six domains finally click - that's when I knew I could do this job.”
“I tried YouTube tutorials, Udemy, everything. Always felt like I was missing something. The structured 60-day path was exactly what I needed. No more random jumping around.”
Try the first week completely free. No credit card required.