Gain insights into the role of back-end developers with this comprehensive guide. Learn about the core responsibilities they tackle, from building database structures and APIs to ensuring data security and optimizing server performance. This guide covers essential skills, such as proficiency in languages like Node.js, Ruby, and C#, and familiarity with database management systems like MySQL and MongoDB. An ideal resource for anyone interested in the unseen yet critical aspects of development that keep websites and applications running smoothly.