📚 Yadnyesh Rana's Digital Catalog

Level Up Your
Android Engineering Career

Highly curated developer resources, step-by-step cookbooks, and comprehensive interview databases designed to help you land your dream role, write better Kotlin, and design scalable apps.

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The Complete Android Engineer Bundle

Everything you need to prep for and grow in an Android engineering career, bundled at one price. Includes the Interview Question Bank, Compose Cookbook, System Design Playbook, and Performance Playbook.

4 Premium Products
300+ Interview Q&As
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₹999 ₹2,196 One-time purchase / Lifetime updates
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Android Interview Question Bank (2026 Edition)

Stop wasting hours browsing outdated blogs. Get instant access to **300 highly curated interview questions** and comprehensive, production-grade Kotlin answers covering Kotlin, Jetpack Compose, Coroutines, Flow, Hilt, Room, and App Performance.

300 Curated Q&As
Junior to Senior (L1–L3)
100% Kotlin Examples
₹499 One-time purchase / Lifetime updates
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Jetpack Compose Cookbook (Premium UI & Animations)

Accelerate your declarative UI development. Get instant access to **12 production-grade, highly optimized recipes** complete with copy-pasteable Kotlin code, detailed API deep dives, and beautiful visual design blueprints.

12 Premium Recipes
12 Visual UI Blueprints
60 FPS Animation Code
₹399 One-time purchase / Lifetime updates
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The Ultimate Android System Design & Tech Lead Bundle

Get the complete blueprint to transition from Senior Engineer to Tech Lead / Architect. Includes the flagship System Design Playbook, plus three premium bonuses: the 2026 Interview Question Bank, the Jetpack Compose Custom UI Cookbook, and the Android Gradle Optimization Cheat Sheet.

4 Premium Resources
150+ Pages of Deep Guides
Senior & Lead (L2–L4) Focus
$19 One-time purchase / Lifetime updates
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Android Performance Optimization & Profiling Playbook

Master high-end Android performance engineering. Get instant access to **12 advanced performance chapters** complete with vector flowcharts, manual heap dump analysis guides, JIT/AOT compiler deep dives, Compose compiler stability optimization, and custom benchmark testing scripts.

12 Performance Chapters
Systrace & Perfetto Analysis
Compose Stability Optimizations
₹699 One-time purchase / Lifetime updates
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Android Security, Hardening & Reverse Engineering Handbook

Master advanced mobile security engineering. Get instant access to **20 advanced security topics** complete with vector flowcharts, dynamic memory map checkers, Frida hooking detectors, SQLCipher database setups, and backend Play Integrity token verifiers.

20 Security Topics
Frida & Root Detection Logic
Play Integrity Attestation
₹799 One-time purchase / Lifetime updates
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Jetpack Compose Custom UI Masterclass

Master advanced custom graphics, drawing, gestures, and custom layouts in Compose. Get instant access to a **37-page print-ready handbook** complete with 12 high-fidelity geometry SVG diagrams, copy-pasteable Kotlin code blueprints (Bezier charts, dial knobs, joysticks, nested scroll connections), and release optimization checklists.

12 SVG Geometry Diagrams
10+ Kotlin Code Blueprints
120 FPS Drawing & GPU Cache
₹1,499 One-time purchase / Lifetime updates
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Modern Kotlin & Concurrency: Ultimate Interview Prep Blueprint

Master the concurrency loops and core Kotlin mechanics tested by top-tier tech companies. Get instant access to an **81-page playbook** with 55 senior-level questions, continuation Passing Style (CPS) state machine bytecode breakdowns, supervisor job hierarchies, reactive Flow buffer pipelines, virtual time testing, and a custom token-bucket rate limiter.

55 Advanced Q&As
81-Page Master Playbook
2-Hour Audio Study Companion
₹2,499 One-time purchase / Lifetime updates
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Jetpack Compose & UI Architecture: Ultimate Interview Prep Blueprint

Master the declarative UI and UI architecture loops tested by top-tier tech companies. Get instant access to an **82-page playbook** with 55 senior-level questions, Compose runtime slot table and gap buffer internals, snapshot state systems, custom measure-and-place layouts, pointer input gesture processing, stability annotations optimization, and Google interview loop strategies.

55 Advanced Q&As
82-Page Master Playbook
Audio Study Companion Available
₹2,499 One-time purchase / Lifetime updates
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Kotlin Multiplatform & Compose Multiplatform: Premium Developer Cookbook

Master the cross-platform pipeline. Get instant access to **10 modular coding blueprints** covering KMP setup, centralized version catalogs, shared Ktor HttpClient engines, local persistence with Room Multiplatform, Compose resources configuration (fonts, images, strings), Koin dependency injection contexts, Voyager stack navigation, expect/actual platform APIs, multithreading flow observers, local caching settings, and Swift framework Xcode integrations.

10 KMP Code Blueprints
38-Page Master Playbook
Pre-configured Project Zip Included
₹199 One-time purchase / Lifetime updates
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Kotlin Multiplatform & Concurrency: Developer Cheat Sheet

A high-performance quick-reference card detailing Kotlin 2.4.0 centralized version catalog configurations, target architectures, Ktor shared engines, Koin injection patterns, Swift coroutines observers, and thread pool dispatch loops.

4-Page Reference Card
Kotlin 2.4.0 + Compose 1.11.1
Free / $0+ Download
Free Pay what you want ($0+) / PDF download
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Jetpack Compose Performance & Recomposition: Developer Cheat Sheet

A high-performance reference card detailing recomposition-bypass modifiers, state read deferrals, stability optimizations, stability report configurations, and lazy list recycling patterns.

3-Page Reference Card
Compose 1.11.1 + Compiler Reports
Free / $0+ Download
Free Pay what you want ($0+) / PDF download
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Android System Design & Architecture: Developer Checklist

A comprehensive, 12-page reference checklist and codebase blueprint detailing monorepos, offline-first syncing pipelines, local database encryption, hardware biometrics, and coroutine execution boundaries.

12-Page Reference Handbook
Gradle, Room, Keystore, & Coroutines
Free / $0+ Download
Free Pay what you want ($0+) / PDF download
Browse Reference Download Free
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Android On-Device AI: Gemini Nano & AI Edge SDK Playbook

Master local generative model execution on flagship NPUs. Learn how to configure local AI dependencies, whitelist device access, direct-bind to AICore service, orchestrate custom token stream flows, write compact local prompt context structures, and implement robust repository-pattern hybrid fallbacks to cloud Gemini Pro APIs.

Google AI Edge SDK & AICore
12-Page Print-Ready Playbook
Android Studio Chat Project Included
₹249 / ₹499 One-time purchase / Includes code template
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Modern Android Screenshot Testing Playbook

Learn JVM-based visual regression testing. Configure gradle pipelines, write lightning-fast screenshot assertions on mock LayoutLibs, manage multi-frame state transitions using Robolectric simulators, and automate pixel-perfect visual audits directly on GitHub Actions pull request workflows.

Paparazzi, Roborazzi & Google Previews
12-Page Vector PDF Playbook
GitHub Actions CI Template Included
₹199 / ₹399 One-time purchase / Includes code template
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Android Gradle Build Speed & Centralized build-logic Playbook

A high-performance system engineering playbook detailing properties optimizations, composite build-logic precompiled Kotlin DSL scripts, KAPT to KSP migrations, lazy task registrations, and deep diagnostic build scans.

Gradle JVM & Garbage Collector Configs
15-Page A4 Print-Ready Playbook
Free / $0+ Download
Free Pay what you want ($0+) / PDF download
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Android & Compose Testing Playbook

Stop shipping tests that only prove your code compiles. Get instant access to **12 senior-level testing topics** covering JUnit5, MockK, Turbine, Jetpack Compose UI testing, Hilt & Room integration testing, and the CI strategy that keeps a growing suite fast instead of flaky.

12 Testing Topics
Turbine, MockK & Compose UI Testing
Hilt, Room & CI Test Matrices
₹599 One-time purchase / Lifetime updates
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Jetpack Compose Adaptive UI & Foldables Playbook

Stop stretching a phone layout wider and calling it tablet support. Get instant access to **12 senior-level topics** covering WindowSizeClass, canonical list-detail/supporting-pane layouts, foldable hinge detection with Jetpack WindowManager, the new NavigationSuiteScaffold and MediaQuery-style APIs, desktop windowing, and the exact Play Console large-screen checklist.

12 Adaptive UI & Foldables Topics
WindowSizeClass, Foldables & Jetpack WindowManager
NavigationSuiteScaffold, Desktop Windowing & Play Console Checklist
₹699 One-time purchase / Lifetime updates
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Android System Design Interview Question Bank (2026 Edition)

30 real "design X" prompts Android interviewers actually ask — with worked answers, not bullet notes. Kotlin/Android-specific, not another generic "mobile" course bundle: offline-first sync, caching, real-time systems, app architecture at scale, mobile-specific trade-offs, and 5 full mock walkthroughs (Instagram's feed, WhatsApp-style chat, Dropbox-style sync, Uber-style tracking, Spotify-style offline downloads).

30 Questions Across 6 Chapters
Offline-First Sync, Caching & Real-Time Systems
5 Full Mock System Design Walkthroughs
₹599 One-time purchase / Lifetime updates
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YR

Yadnyesh Rana

Senior Android Engineer

About the Author

Hi, I'm Yadnyesh! I am a professional Android engineer with a passion for designing clean, high-performance mobile applications and mentoring other developers to excel in their careers.

These handbooks and cookbooks compile my years of industry experience solving complex bugs, passing high-bar technical interviews, and architecting systems. My goal is to write the most concise, code-heavy, and practical guides available for modern Android developers.

View my portfolio & projects