A Behavior-Driven Development (BDD) developer is involved in a software development approach that emphasizes collaboration among stakeholders, including developers, QA and non-technical or business participants in a software project. This approach encourages teams to use conversation and concrete examples to formalize a shared understanding of how the application should behave. The core activities of a BDD developer include: . Requirements Gathering: The BDD developer collaborates with the team to understand and define the expected behavior of the system. This involves conversations with stakeholders to capture the requirements in a language that is understood by all. . Writing User Stories: The developer then translates these requirements into user stories. These are simple, clear descriptions of a feature told from the perspective of the user. The stories typically follow a simple template: "As a , I want so that ". . Defining Acceptance Criteria: Each user story has a set of acceptance criteria, which are conditions that the system must meet to be considered 'done'. The BDD developer defines these criteria, which are then used for development and testing. . Writing BDD Scenarios: The BDD developer writes scenarios in a specific format known as Gherkin - Given, When, Then. This is a language that allows you to describe the behavior without detailing how it is implemented. - Given: The initial context at the beginning of the scenario, also known as preconditions. - When: Specifies the event of the scenario. - Then: The expected outcome or result. . Developing the Feature: The BDD developer then writes the code to make the scenario pass. This is typically done using a BDD framework like Cucumber, SpecFlow, or JBehave. . Refactoring: After the code is written, the developer refactors it to ensure it's clean, simple, and devoid of duplication. . Review and Feedback: The BDD developer participates in reviews of the code and the behavior of the system. They also incorporate feedback from stakeholders and make necessary changes. . Automation Testing: BDD developers use BDD tools to automate the scenarios, which serve as living documentation and automated tests. This helps to ensure that the software continues to work as expected even as changes are made. . Collaboration: A BDD developer collaborates closely with other team members, including other developers, QA testers, business analysts, and stakeholders. This is to ensure that everyone has a shared understanding of what is being built and why. Overall, a BDD developer focuses on understanding the behavior of the system from the user's perspective, and then developing and testing the system to ensure it meets those expectations. They act as a bridge between business and technical perspectives, helping to ensure that everyone is aligned and working towards the same goals.