The responsibilities of a backend developer include writing APIs, interacting with the database, creating libraries, and improving the data architecture. Some more responsibilities of a backend programmer are –

• Coordinate with frontend developers and develop server-side algorithms to transfer data efficiently to the client-side web applications.
• Cross-collaborate with PM(Project Manager), and QA (Quality Assurance) engineers to optimize and develop a quality User Experience (UX).
• Make sure the application is fast and performs the same whenever the user traffic changes.
• Collaborate with the stakeholders to understand their particular needs, then translate those into technical requirements and come up with the most effective and efficient technical solution.
• Optimize the applications for increasing response time and efficiency.
• Analyze the requirements and goals, handle bugs and errors, and come up with efficient and fast solutions.
• Interact with the database for storing data.
• Manage and develop APIs (they help two software in communicating with each other over the internet) that are executed across the devices.
• Building the architecture of the system while keeping in mind the scalability, speed, and stability of the applications.
• Implementing security structures and their best practices.
• Writing reusable code and libraries for future implementation.