Step 1
Python
Variables, control flow, functions, data structures, files and errors, then classes and modules. The server-side language for this path; Go is the alternative if you prefer a compiled, typed one.
3 sections219 lessonsFree certificate
Backend Developer Roadmap
Five free courses that cover what every backend job assumes: a server-side language, a database, version control, a terminal and containers. You write and run real code on every lesson, and each course ends with a free certificate.
- 5courses
- 8sections
- 498hands-on lessons
The backend developer roadmap, step by step
Each step is an existing Coddy course. Take them in order, or start from the one you are missing - progress is saved per course either way.
- 1
- 2Step 2
SQL and databases
SELECT, WHERE, JOIN, GROUP BY, subqueries, indexes and schema design against live tables. The half of backend work that happens in the database.
2 sections99 lessonsFree certificate
- 3Step 3
Git and version control
Commits, branches, merging, conflicts, remotes and undoing mistakes. Every backend team ships through Git; every code review happens in it.
1 sections58 lessonsFree certificate
- 4
Files, permissions, processes, pipes and bash basics. Backend code runs on Linux servers, and debugging it means being at home in a terminal.
1 sections82 lessonsFree certificate
- 5Step 5
Docker and containers
Images, Dockerfiles, volumes and networking. How a backend service is packaged so it runs the same on your laptop, in CI and in production.
1 sections40 lessonsFree certificate
What you get
Everything you'll use to learn to code
Learn by Doing
Write real code, query databases, build websites, and master AI prompts. Our interactive lessons cover every skill modern developers need.
playground.js
Code Editor
1const greeting = "Hello, Coddy!"
2function sayHi(name) {
3 return greeting + " " + name
4}
5
Test #1
Test #2
Test #3
Input
"Alex"
Output
"Hello, Coddy! Alex"
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Promotion zoneEvery way to learn
Read, listen, test yourself, ask the AI, or look up anything you've already covered. Every lesson meets you where you are.
Intro to Variables
Audio
A variable is a named container that stores a value you can reference later in your program.
In Python, you create one by writing the name, an equals sign, then the value you want to store.
The value can change over time - reassigning the name simply points it to a new value.
1xSarah
Prove Your Skills
Earn certificates for every course you complete. Add them to your LinkedIn profile and resume to showcase your coding expertise to employers.
Certificate of CompletionThis certifies thatJohn Doehas successfully completedPython Fundamentals
Python Fundamentals
DateJan 2026
Add to LinkedInWhy start backend development with Coddy
- You build the real thing. Real Python programs, real SQL against live tables, real Git commits and real Docker images, all in the browser - the same loop a backend developer runs a hundred times a day.
- Foundations before frameworks. Django, Express and Spring are a few weeks each once you have a language, SQL and Git; they are months of confusion without them. This path is the part frameworks assume.
- AI hints that read your failing code and last error and point at the cause - the off-by-one, the missing JOIN, the wrong branch - without pasting the solution.
- One free certificate per course, five on the path, each verifiable at its own URL and shareable on LinkedIn.
Frequently asked questions about becoming a backend developer
What does a backend developer actually do?
A backend developer writes the code that runs on the server rather than in the browser: the APIs a web or mobile app calls, the logic that decides what happens when a user places an order, and the code that reads and writes the database. Day to day that means a server-side language, SQL, Git, a terminal and, increasingly, the containers the code ships in - which is exactly what this path covers.
Which language should I learn first for backend development?
Python, for most people: it is readable, it is used for backends at every size of company, and it doubles as a scripting language for the automation around them. Go is the other strong choice on Coddy, especially if you are drawn to infrastructure and high-performance services. Pick one, finish it, and the second is far quicker.
Do I need to learn SQL to be a backend developer?
Yes. Almost every backend application sits on a relational database, and an ORM only hides SQL until the first slow query or the first data migration. Knowing how to write a JOIN, an index-friendly WHERE and an aggregate by hand is one of the clearest signals of a backend developer who understands their system.
Does this path teach a web framework like Django, Flask or Express?
Not yet. The path deliberately stops at the foundations a framework assumes - a language, SQL, Git, the terminal and Docker - because those are what most self-taught backend developers are missing when a framework tutorial stops making sense. Framework courses are on the curriculum roadmap and will join this path as new steps.
How long does it take to become a backend developer?
This path is roughly 500 lessons. At an hour a day, Python takes about six weeks, SQL two to three, and Git, Linux and Docker about a month together, so three to four months to finish the foundations. Job-ready usually means adding a framework and one real project on top of that.
Is the backend path free, and do I get a certificate?
Every course on the path is free, including the lessons, the browser-based editors and terminal, the AI hints and the certificates. You get one free certificate per finished course - Python, SQL, Git, Linux and Docker - each verifiable at its own URL.
