A zero-to-hero curriculum for mastering modern Android engineering — built to prepare developers for technical interviews at top product companies.
- Overview
- Who This Course Is For
- Why This Course
- Roadmap
- Repository Structure
- How to Use This Repo
- Roadmap Diagram
- Contributing
- License
Started: August 5, 2026
This repository is a structured, ground-up curriculum covering low-level computer fundamentals, advanced Kotlin concurrency, Jetpack Compose, system design, and production-grade Android architecture — built specifically to prepare developers for technical interviews at MAANG-level and other top product companies.
Rather than stopping at "how to build an app," this course goes into how things actually work under the hood: memory layout, CPU cycles, garbage collection, reactive state management, custom UI internals, and scalable mobile architecture.
This roadmap is built for:
- Beginners who want a structured, ground-up path into Android instead of scattered tutorials.
- Self-taught developers looking to fill gaps in computer science fundamentals and low-level Android internals.
- Working developers preparing for technical interviews at product-based companies, who need system design and architecture depth beyond day-to-day app work.
Prerequisites: none beyond basic programming familiarity — Phase 0 assumes no prior computer science background and builds up from there.
Time commitment: this is a deep, comprehensive course — expect roughly 1–1.5 years of consistent, active study to complete it end to end.
Maintenance: new phases and notes are added regularly as the course develops.
Top tech companies rarely test whether you can wire up a button and an API call. They evaluate:
| Area | What's Tested |
|---|---|
| Low-level fundamentals | CPU cache locality, memory allocation, leaks, thread safety |
| Async concurrency | Kotlin Coroutines, Channels, StateFlow/SharedFlow, backpressure |
| System architecture | MVVM, MVI, Clean Architecture, SOLID, Dependency Injection |
| Modern UI | Jetpack Compose recomposition, layout phases, state hoisting, custom modifiers |
| Mobile system design | Offline-first caching, real-time sync, media streaming, SDK design |
This course is structured around those exact evaluation areas.
A 16-phase path from absolute fundamentals to interview-ready, matching Roadmap.png.
| Phase | Title | Focus | Status |
|---|---|---|---|
| 0 | Become a Computer Engineer | CPU, RAM, storage, processes/threads, networking basics, Git, Linux | ✅ Completed |
| 1 | Kotlin Mastery | Null safety, collections, OOP, sealed classes, coroutines, Flow, generics | ✅ Completed |
| 2 | Android Foundations | Activity/Intent/Manifest, app lifecycle, process management, config changes | ✅ Completed |
| 3 | Jetpack Compose | Composables, state, side effects, lists, gestures, animations, performance | ✅ Completed |
| 4 | Real UI Engineering | Clones of Spotify, WhatsApp, Telegram, Instagram, Google Photos, and more | 🟢 In Progress |
| 5 | Architecture | MVVM, Repository pattern, UseCases, Clean Architecture, Hilt, navigation | 🟢 In Progress |
| 6 | Data | Room, DataStore, SQL, caching strategies, offline-first, pagination | ⚪ Planned |
| 7 | Networking | REST, Retrofit/OkHttp, serialization, auth/JWT, multipart, WebSockets | ⚪ Planned |
| 8 | Coroutines & Flow | Suspending functions, dispatchers, structured concurrency, cancellation | ⚪ Planned |
| 9 | Performance | Memory leaks, recomposition, jank, profilers, baseline profiles | ⚪ Planned |
| 10 | Testing | Unit/UI/integration testing, mocking, TDD | ⚪ Planned |
| 11 | Android Internals | Binder/IPC, AIDL, ART, DEX, APK, Gradle, R8, JNI | ⚪ Planned |
| 12 | System Design (Android) | How WhatsApp, Spotify, Instagram, Maps, and notifications work at scale | ⚪ Planned |
| 13 | Open Source | Reading code, forking, PRs, code review, commit hygiene | ⚪ Planned |
| 14 | Professional Android | Play Store deployment, CI/CD, Fastlane, Crashlytics, release management | ⚪ Planned |
| 15 | Interview Preparation | Android interview questions, LLD, machine coding, DSA, resume/GitHub prep | ⚪ Planned |
Each phase builds on the last — fundamentals first, then language mastery, then framework depth, then architecture and scale.
Android-Development-Course/
├── README.md
├── Roadmap.png
├── phase-0-computer-engineer/
│ ├── notes.md
│ └── Computer Fundamentals.png
└── ... # phases 1–15, added as the course progresses
Each phase folder contains topic notes and supporting diagrams for that stage of the roadmap.
- Clone the repository:
git clone https://github.com/AnkitChoudhary-1/Android-Development-Course.git
- Start at Phase 0 — even if you already know some Android, the fundamentals phases fill in the gaps most tutorials skip.
- Work through each phase in order. The curriculum is cumulative — later phases assume the concepts from earlier ones.
- Star ⭐ the repo to keep track of new phases as they're published.
This is primarily a personal learning-in-public project, but feedback, corrections, and suggestions are welcome:
- Found an error or outdated info? Open an issue.
- Have a suggestion for a topic or resource? Issues and discussions are the best place to raise it.
Licensed under the MIT License.
Made for aspiring Android engineers. Star ⭐ this repository to follow along.
Diagrams and infographics in this repository were created with ChatGPT.