Developer may refer to:
- Software developer, one who programs computers or designs the system to match the requirements of a systems analyst
- Game developer, a person or business involved in game development, the process of designing and creating games
- In real estate development, one who builds on land or alters the use of an existing building for some new purpose
- Photographic developer, a chemical, often a mixture of metol and hydroquinone, which converts the latent silver halide image in the exposed photograph material into reduced, opaque, black silver metal
- Developer (album), the fifth album by Indie rock band Silkworm