Start with the free lessons. When you want the rest, one plan unlocks every lesson in all the courses.
Launch offer35% off Annual and Lifetime with EARLY35. Added for you at checkout.
Monthly
$18 a month
Billed monthly. Cancel any time.
Annual
$56.55 first year
Billed annually. Cancel any time.
Usual price $87 35% off
Lifetime
$37.70 paid once
Pay once. Keep exploring.
Usual price $58 35% off
Prices in US dollars. Taxes may apply at checkout. The launch code EARLY35 applies to the first Annual charge and to Lifetime, and doesn’t combine with regional pricing.
LifetimeLaunch price
Lifetime stays on your LUMO account. Later price changes don’t affect it, and everything included on the day you buy stays included.
Monthly and Annual
Every membership includes
Harpreet Singh@harpreet_dev
I’d read about thread pools and event loops a dozen times. The animated walkthrough made the trade-off obvious in five minutes.
Grace MensahSenior engineer, e-commerce
The key numbers sheet lives in my bookmarks now. I use it every time we size a new service.
Omar Haddadr/cscareerquestions
I walked into my system design round with a framework instead of buzzwords, and it showed.
Ananya IyerBackend engineer, fintech
Every lesson gets to the point. I can finish one on my commute and actually remember it.
Rohan Kulkarni@rohan_ships
After the caching lesson I fixed a stampede problem we’d been living with for months.
Sneha Joshir/ExperiencedDevs
I point new hires here first. The diagrams explain things better than our internal docs.
Minh Tran@minhtran_io
I study after work, so short lessons matter. Each one leaves me with something I can explain to someone else.
Arjun MehtaPlatform engineer, SaaS
Most courses tell you what to use. This one explains when it stops working, which is what I actually needed.
Tolu AdeyemiSoftware engineer, payments
Three years in and I still learned something. Now my team and I argue about the same diagram instead of past each other.
Priya Thapa@priyathapa_
I do most of my learning on the metro. The lessons load fast and read well on a small screen, which is rare.
Aditya Menonr/learnprogramming
I thought I understood load balancing. The quiz at the end proved otherwise, and the explanation fixed it.
Amara Okeke@amaraokeke
The diagrams are the best part. I sketch them from memory now before every design discussion.
Karthik Reddyr/developersIndia
Two weeks of evenings with this and I had a clear way to break down any design question they threw at me.
Linh NguyenSoftware engineer, travel tech
It respects that I’m an engineer. No filler, no hype, just the reasoning behind each choice.
Vikram Choudharyr/devops
Coming from infrastructure, I never saw the full request path. These lessons connected the pieces for me.
Meera KrishnanSenior engineer, insurance
When juniors ask where to start with system design, I send them here. It’s the resource I wish I’d had.
Learners around the world
No. Both unlock every lesson in every course. The only difference is how often you pay and how much you save over a year.
Every current course, every course released later, and every update to them. You pay once; it never renews and never expires. It stays with the account that bought it.
EARLY35 takes 35% off your first Annual charge or the Lifetime payment. It’s added for you at checkout. Annual renews at $87 a year, and Monthly is always $18 a month.
In eligible countries, every plan is 50% off, renewals included. It’s applied automatically from your location. Regional pricing and launch codes don’t combine; you get whichever saves you more.
Yes. Cancel Monthly or Annual from your billing page at any time. You keep access until the end of the period you paid for.
Usually, yes. Company learning budgets often cover courses like these, and checkout gives you an invoice and a receipt to submit.
Team purchases, invoices, or a billing question the plans above don’t answer. Email us
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