A handcoding developer is a programmer who writes code from scratch instead of using automated tools or pre-made templates. They have a deep understanding of programming languages, algorithms, and system structures. They manually create, modify, and debug software, ensuring that the code is clean, efficient, and optimized. Handcoding allows for a high degree of customization and can result in more efficient and lightweight code. However, it requires a high level of skill and can be time-consuming. Handcoding developers often work on complex projects where pre-existing solutions are insufficient or on projects that require a high level of customization.