A well written job description will attract the best candidates for your project, so investing a little time in this will definitley pay off.
Here’s some tips on what you should include in your job description:
About you / your company
Who are you? Where are you located?
What you do
What’s your company doing?
Your back story
How did your project evolve? Why did you start it?
Who will be your users? If you already have users, who are they?
What will be the end product?
What will be the actual work? If your project covers multiple areas, list them all (e.g. logo design, web programming, copywriting etc).
Who you’re looking for
What’s the ideal profile you’re looking for?
Are there any inspirational examples, e.g. other websites, logos…?
When do you want to launch your project?