A Handel-C developer designs, develops, and tests software programs using Handel-C language, a high-level programming language primarily used for hardware description. They utilize Handel-C to write codes for electronic devices like FPGAs (Field-Programmable Gate Arrays) and create digital circuits. Their tasks include debugging programs, optimizing code for performance, maintaining documentation, and ensuring compatibility with other hardware systems. They also often collaborate with hardware engineers to understand their requirements and translate them into software solutions. Additionally, they stay updated with the latest industry trends and advancements in Handel-C language and FPGA development.