We are seeking a skilled Back End Developer to join our team onsite in Purbalingga. In this role, you will be responsible for building and maintaining the server-side logic, databases, and APIs that power our web applications. You will work closely with front-end developers to ensure seamless integration between the server and the user-facing side of the application. Key Responsibilities: Develop and maintain server-side components and applications. Build and manage databases, ensuring they are optimized for performance and scalability. Design and implement APIs for seamless communication between the front-end and back-end systems. Collaborate with front-end developers to integrate user-facing elements with server-side logic. Write clean, efficient, and reusable code. Perform regular system testing and debugging to ensure functionality. Optimize application performance and troubleshoot issues as they arise. Ensure the security of data and applications by implementing best practices. Stay up-to-date with the latest back-end technologies and development trends.