- Writing clean, maintainable, and well-tested Kotlin code following best practices and design patterns.- Implementing MVVM and Clean architecture for clear separation of concerns between UI, data, and business logic.- Consuming and manipulating data from RESTful APIs using Retrofit library.- Managing asynchronous operations effectively with Coroutines.- Leveraging Dagger Hilt for efficient dependency injection, reducing boilerplate code and improving testability.

Collaborating as a consultant and trainer in the field of Android software development, providing expertise in architecture and code design, codereviews, troubleshooting, planning and scheduling, and risk management, to companies 'Sepidyar Hesab Arad' and 'Tejarat Rayane Tavakoli'.

- Designing and developing user interfaces for POS applications using Android Studio, Kotlin, Java, and Material Design.- Integrating POS applications with payment gateways, processors, and terminals using payment APIs and SDKs.- Parsing, constructing, sending, and receiving ISO 8583 messages for different types of payment transactions using ISO 8583 libraries.

- Defining project scope, requirements, and timeline.- Selecting appropriate libraries and frameworks based on project needs- Writing clean and maintainable code according to best practices and design patterns.- Implementing application logic using Java and Kotlin languages.