Every lesson ends in a lab that shows whether you got it.

A 3-minute video, 2 questions marked on the spot and a lab that runs in your browser. Season 1 is live with 32 rooms, and the first 2 are free with an account.

Try a free room See the syllabus

2 free rooms
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Audio in English or Portuguese

you@lab:~$ dig onovo.dev

;; ANSWER SECTION:

onovo.dev. 2400 IN A 203.0.113.10

you@lab:~$ ▍

32rooms live in season 1
≈3 minof video per room
6chapters, each with a review
5seasons, one per book

One room, 4 tasks

A first-try answer earns full XP. Miss it and you try another option for half the XP.

Task 1WatchA 3-minute video with the host
Task 2Check2 questions, marked on the spot
Task 3LabTerminal, code or a scenario in your browser
Task 4Real lifeHow to use it at work tomorrow

Season 1: The Developer Foundation

32 rooms in 6 chapters, from what happens inside a computer to how a system grows.

1. How a computer works
6 rooms
- IntroThe enemy: the disorganised careerfree2:46
- 01Everything is data + instructionsfree3:12
- 02Memory vs storage3:17
- 03The operating system as a resource manager2:55
- 04Processes and threads3:08
- 05Abstraction layers2:56
2. How the internet works
5 rooms
- 06Client and server2:58
- 07DNS: names become addresses3:01
- 08TCP/IP and guaranteed (or not) delivery2:59
- 09HTTP/HTTPS and the request/response cycle3:18
- 10APIs as contracts2:57
3. How to think in code
6 rooms
- 11State and variables2:56
- 12Functions and composition2:57
- 13Data structures are cost decisions3:04
- 14Algorithms and complexity (Big-O intuition)3:04
- 15Object orientation: when it helps3:09
- 16Functional programming: what to keep2:57
4. Where data lives
5 rooms
- 17Relational modelling3:27
- 18SQL as a language for asking questions3:14
- 19Indexes and why queries get slow3:00
- 20Transactions and consistency3:15
- 21NoSQL: when and why3:25
5. How software gets built
5 rooms
- 22Git as history and collaboration3:02
- 23Tests as a safety net2:58
- 24Debugging as the scientific method3:15
- 25CI/CD2:52
- 26Containers and cloud (the minimum that matters)3:24
6. How systems grow
5 rooms
- 27Monolith vs microservices (trade-offs)3:14
- 28Queues and async processing3:17
- 29Cache3:18
- 30Scalability and observability3:31
- WorkshopWorkshop 1 — Your Gap Map2:57

XP, streaks and a certificate

XP and levelsEvery right answer adds XP. You level up from hello world to release.
StreakEvery day you study counts towards your streak.
CertificateFinish all 32 rooms and download a certificate of completion.