Hi Kevin: web site developer. ☛ Desarrollador de sitios web. software developer. ☛ Desarrollador de software. Hope this helps, Kevin! Kind regards.

Oh, I'm actually one of those! Desarollador Web Desarollador de Software Those are the terms you're looking for.

Web site developer can be a "desarrollador de páginas web". There's also "diseñador de páginas web" for web site designer. There is "desarrollador de software" or "desarrollador de sistemas" for "software developer". You can also just say "programador" (computer programmer).