There are several types of software engineers, each with their own unique skillset and responsibilities. Some common types of software engineers include:

1. Full-Stack Software Engineer: Full-stack software engineers have a broad range of skills, including front-end development, back-end development, and database management. They are able to work on all aspects of a software application and are able to see a project through from start to finish.
2. Front-End Software Engineer: Front-end software engineers focus on the design and development of the user interface and experience of a software application. They work with languages such as HTML, CSS, and JavaScript to create the visual aspects of an application.
3. Back-End Software Engineer: Back-end software engineers focus on the development and maintenance of the server-side of a software application. They work with languages such as Python, Java, and C++ to create the underlying infrastructure and functionality of an application.
4. Mobile Software Engineer: Mobile software engineers specialize in the development of applications for mobile devices such as smartphones and tablets. They work with languages and frameworks specific to mobile development, such as Swift for iOS and Kotlin for Android.
5. DevOps Engineer: DevOps engineers focus on the integration and automation of software development and deployment processes. They work with tools such as Git, Jenkins, and Docker to streamline and optimize the development and delivery of software.
6. Data Engineer: Data engineers focus on the design and development of systems for storing, processing, and analyzing large amounts of data. They work with technologies such as Hadoop, Spark, and NoSQL databases to create scalable data pipelines and architectures.
7. Security Engineer: Security engineers specialize in the design and implementation of security measures for software applications and systems. They work with tools such as encryption, authentication, and firewall configurations to protect against security threats.
8. Cloud Engineer: Cloud engineers focus on the design and development of cloud-based systems and applications. They work with cloud platforms such as Amazon Web Services (AWS), Microsoft Azure, and Google Cloud to build and maintain cloud infrastructure.
9. Quality Assurance (QA) Engineer: QA engineers focus on the testing and quality assurance of software applications. They work with tools such as test cases, debugging tools, and automation frameworks to ensure that software is functional, reliable, and meets the requirements of the client.
10. Technical Project Manager: Technical project managers are responsible for the planning, execution, and delivery of software development projects. They work closely with software engineers and other team members to ensure that projects are completed on time and within budget.

Overall, the responsibilities of a software engineer can vary depending on their specific role and the needs of the organization they work for. However, all software engineers work to design, develop, and maintain software systems and applications to meet the needs of users and clients.