Android

• Basic : Activity lifecycles, Fragments, Navigation Controller, Recycler view, JUnit testcases
• UI : Databinding, Contraint layout, Motion layout, Coordinator layout, Material designs, Vectors, Bottom sheets, 9Patch, Chip groups, Dark mode
• MVVM : View models, Observers, Live Data, Coroutines
• Network & DB : Retrofit, Moshi, Gson, Room Persistance Library, Volley, Firebase Storage, AWS S3
• Services : Intent service, Work Manager, Alarm Manager, Broadcasts
• APIs & Cloud : Firebase (MLKit, Storage, Analytics, Events), Tensorflow (Posenet, Image classification, Object detection, Sound detection), AWS (Lex Bot, MWS, SQS), Niantic (PokemonGo APIs), Google Fit, Fitbit
• Libraries & SDK : Jetpack, PayU Gateway, MPChart, Glide, Zendesk, Google play services, Firebase

Kotlin

• Basics : Operators, Array, Loops, Iterators
• Functions : Compact Functions, Filters, Lambdas, Generic, Extension, Inline, SAM, High order
• Classes : Inheritance, Interface, Data class, Generic, Sealed/Object/Companion/Enum

Python

• Basics : Strings, Lists and Tuples, Dictionaries and Sets, Conditional Execution & Loops, Comprehensions, Functions, Modules
• Intermediate : File Handling, Object Oriented Programming, Iterator, Generator, Decorators, Lambda Expressions
• Libraries : Matplotlib, OpenCV, Numpy, Pandas, Requests, NLTK, TKinter, Tensorflow, Selenium webdriver, Boto, MWS, Scipy, SQL alchemy, Pillow, BeautifulSoup, TextBlob, Kivy, Flask