Dependency Injection refers to a design pattern used in software development that allows for the decoupling of components by injecting dependencies rather than hardcoding them within a class. This skill involves understanding how to manage object creation and lifecycle, enabling more modular, testable, and maintainable code. Knowledge of Dependency Injection is used to facilitate the development of applications by promoting separation of concerns and enhancing code reusability through the use of interfaces and configuration.

Lambda Calculus refers to a formal system in mathematical logic and computer science for expressing computation based on function abstraction and application. This skill encompasses the understanding of functions as first-class citizens, enabling the representation of algorithms and the manipulation of symbolic expressions. Knowledge of Lambda Calculus is used to analyze and design programming languages, facilitate functional programming, and explore concepts in type theory and computability.

REST API Development refers to the process of creating application programming interfaces that adhere to the Representational State Transfer architectural style. This skill involves designing, building, and maintaining APIs that facilitate communication between different software applications over the internet. Knowledge of REST API Development is used to enable seamless data exchange, enhance interoperability, and support the integration of various services and applications in a scalable manner.

RESTful API is a type of web service that allows communication between different applications through HTTP requests. It is designed to be flexible, scalable, and easy to use, and adheres to a set of architectural principles called REST, which helps to ensure predictability and reliability in the way that data is transmitted and processed. RESTful API is commonly used by developers to build interactive web applications and services that can be accessed by a wide range of devices and platforms.

Software Design Patterns refer to general reusable solutions to common problems that occur within software design. This skill encompasses the identification, application, and adaptation of design patterns to improve code maintainability, scalability, and readability. Knowledge of Software Design Patterns is used to facilitate effective communication among developers and to streamline the development process by providing proven templates for solving design challenges.