Everything you can learn on coddy.tech — bite-sized, hands-on, free to finish.
⭐ Star this repo to keep the roadmap handy — and don't know where to start? Take the 2-minute onboarding quiz.
A journey is Coddy's guided path for one language: ordered sections, ~30 minutes a day, a free certificate at the end. Some tracks (TypeScript, Next.js, Luau, Roblox Scripting, Git, Docker, Kubernetes, SwiftUI, CSS) live inside a parent journey — the Sections column names it. Journeys with several certificates (Node.js, Django, Pygame, Godot, Flutter, Arduino) issue one per section.
| Language | Sections | Start | Path | Docs | Certificate |
|---|---|---|---|---|---|
| Python | 3 | Start | Path | Docs | 🎓 |
| Machine Learning | 4 | Start | Path | — | — |
| Pygame | 7 | Start | Path | Docs | 🎓 |
| Django | 6 | Start | Path | — | 🎓 |
| JavaScript | 4 | Start | Path | Docs | 🎓 |
| TypeScript | 1 (in JavaScript) | Start | Path | Docs | — |
| React | 2 | Start | Path | Docs | — |
| Next.js | 1 (in React) | Start | Path | — | — |
| Node.js | 6 | Start | Path | Docs | 🎓 |
| HTML & CSS | 5 | Start | Path | Docs | 🎓 |
| Java | 3 | Start | Path | Docs | 🎓 |
| C++ | 3 | Start | Path | Docs | 🎓 |
| C# | 3 | Start | Path | Docs | 🎓 |
| Unity | 4 | Start | Path | — | — |
| C | 3 | Start | Path | Docs | 🎓 |
| Go | 3 | Start | Path | Docs | 🎓 |
| Rust | 3 | Start | Path | — | 🎓 |
| PHP | 3 | Start | Path | Docs | 🎓 |
| Ruby | 3 | Start | Path | — | 🎓 |
| Swift | 4 | Start | Path | — | 🎓 |
| SwiftUI | 1 (in Swift) | Start | Path | — | — |
| Kotlin | 3 | Start | Path | — | 🎓 |
| Dart | 3 | Start | Path | — | 🎓 |
| Flutter | 7 | Start | Path | — | 🎓 |
| Lua | 5 | Start | Path | — | 🎓 |
| Luau | 1 (in Lua) | Start | Path | — | — |
| Roblox Scripting | 1 (in Lua) | Start | Path | — | — |
| GDScript | 3 | Start | Path | Docs | 🎓 |
| Godot | 6 | Start | Path | — | 🎓 |
| R | 3 | Start | Path | Docs | 🎓 |
| SQL | 2 | Start | Path | Docs | 🎓 |
| Terminal | 4 | Start | Path | — | 🎓 |
| Git | 1 (in Terminal) | Start | Path | — | — |
| Docker | 1 (in Terminal) | Start | Path | — | — |
| Kubernetes | 1 (in Terminal) | Start | Path | — | — |
| Excel | 2 | Start | Path | Docs | 🎓 |
| Power BI | 3 | Start | Path | — | 🎓 |
| AI Prompts | 3 | Start | Path | Docs | 🎓 |
| Verilog | 2 | Start | Path | Docs | — |
| Arduino | 6 | Start | Path | — | 🎓 |
| Assembly | 2 | Start | Path | — | 🎓 |
| Solidity | 1 | Start | Path | — | 🎓 |
| Space | Journeys | Path |
|---|---|---|
| ♟️ Chess | Learn Chess · Tactics & Checkmates · Endgames · Openings 🔜 · Strategy 🔜 · Chess Coach | Path |
| ➗ Math | Pre-Algebra · Algebra · Geometry · Algebra 2 · Trigonometry | Path |
| ⚛️ Physics | Physics for Beginners (Mechanics · Electricity and Magnetism · Optics, Waves and Modern Physics) | Path |
| 🧪 Chemistry | Chemistry (7 sections, from Atomic Structure to Food Chemistry and the Lab) | Path |
| 🛡️ Cybersecurity | Cybersecurity · standalone Investigations | Path |
Cross-language tracks — most courses let you code in your language of choice.
| Track | Courses | Path |
|---|---|---|
| Data Structures & Algorithms | 16 | Path |
| Graph Algorithms | 7 | Path |
| Interview Preparation | 10 | Path |
| Computer Networking | 4 | Path |
Browse all 140 standalone courses at coddy.tech/landing/courses.
| 🕹️ Arcade | Free browser games made with code — Roblox-style Luau, pygame, Godot and Unity — each linked to the course that teaches how it was built. Remix any of them. |
| 🎮 Game development | One course per engine and the four game paths, in one place |
| 🧩 Daily challenge · Practice | A new coding challenge every day, plus practice problems by language and difficulty |
| 💼 Interview problems · Interview questions | 200+ problems with hints and full solutions, and question banks by language and topic — see Interview Preparation |
| 📚 Docs · Cheat sheets | Reference with runnable examples, and printable cheat sheets |
| Run code in the browser, from Python to Godot, Unity, Django and Express | |
| 🔎 Visualize · Tools | Watch algorithms run, and 40+ free developer tools |
Roadmaps that string journeys and courses together in the order a job needs them. Finish every step of a path to earn one free certificate of completion for the whole path, on top of the section and course certificates it bundles.
| Path | Builds on |
|---|---|
| Frontend Developer | HTML & CSS · JavaScript · TypeScript · React · Next.js · Git |
| Full Stack Web Developer | HTML & CSS · JavaScript · TypeScript · React · Next.js · SQL · Terminal · Git · Docker |
| MERN Stack Developer | HTML & CSS · JavaScript · React · Node.js (Express, MongoDB, auth) · Terminal · Git |
| Backend Developer | Python · SQL · Terminal · Git · Docker — also in JavaScript with Node.js, Java, Go, PHP, Rust, Kotlin |
| Software Engineer | Python · Terminal · Git · SQL · DSA — also in Java, JavaScript, C++, C#, Go, Rust |
| DevOps | Terminal · Git · Docker · Kubernetes · SQL · Python — also in Go |
| Data Analyst | Excel · SQL · Power BI · Python · NumPy · pandas · R (optional) |
| Data Science | Python · SQL · Machine Learning |
| iOS Developer | Swift · SwiftUI · DSA in Swift · Terminal · Git |
| Flutter Developer | Dart · Flutter · Terminal · Git |
| Roblox Game Development | Roblox Scripting · 7 complete Roblox games |
| Unity Game Development | Unity · object-oriented C# · Snake 3D, Brick Breaker and Tower Defense |
| Python Game Development | The Pygame journey, section by section |
| Godot Game Development | The Godot journey · four complete 2D games |
| Data Structures & Algorithms | The DSA, graph and interview tracks, in 14 languages |
| Computer Networking | Terminal · the networking courses · Docker |
Built something while learning? Tag your repo with the GitHub topic coddytech so other learners can find it.
- 💬 Discussions — questions, ideas, course requests
- 🐛 Issues — broken links, wrong info
This repo is a roadmap, not a content mirror — course content lives on coddy.tech and isn't accepted via PR here.