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.
2,204,234+ codders enrolled across these courses
498 lessons547 challenges2,601 quiz questions
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A path certificate at the end, plus 8 along the wayEach 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.
Write real code, query databases, build websites, and master AI prompts. Our interactive lessons cover every skill modern developers need.
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January 2026
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Double or Nothing
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Promotion zoneRead, listen, test yourself, ask the AI, or look up anything you've already covered. Every lesson meets you where you are.
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.
Earn certificates for every course you complete. Add them to your LinkedIn profile and resume to showcase your coding expertise to employers.
Certificate of CompletionPython Fundamentals
Add to LinkedInA 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.
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.
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.
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.
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.
Every course on the path is free, including the lessons, the browser-based editors and terminal, the AI hints and the certificates. You get a free certificate for each course you finish (Python, SQL, Git, Linux and Docker), each verifiable at its own URL, and one more for the whole path once every step is done.
Yes. Finish every step and you get one free certificate for the whole Backend Developer path. It lists each course you finished on the way, and links each course's own certificate, so anyone can check every skill it names. You can add it to your LinkedIn profile. It is a certificate of completion from Coddy, not an accredited qualification.
