"purposefully designed" is correct and can be used in written English.
You can use it to describe a thing that has been created with a specific intention. For example, "The new website was purposefully designed to increase new user registrations."
Katayama's interiors are purposefully designed to be experienced independent of what is being sold.
But there are levels that have been purposefully designed to be very open".
And his product name seems purposefully designed to be as non-commercial as possible.
Meanwhile, the HRA was purposefully designed to be more than an incorporated treaty.
But synfuel processes are not environmentally benign unless purposefully designed that way, and this raises the cost.
As an art form, theatre does not require a purposefully designed building in which to be presented.
Klimowski's art, too, seems purposefully designed to deflect attempts at realist interpretation – the characters look as if they come from propaganda posters issued by their own broken psyches.
"Unfortunately, I think the offer is purposefully designed to make it easy for you to get your credit report, and then forget that you've just signed up for an in-perpetuity fee".
The microblogging platform Twitter is purposefully designed to exchange information and to facilitate reciprocal communication and attribution, therefore enabling the creation of communities of individuals interested in common topics.
"I support the goal of financial stability and do not believe that accounting standards and financial reporting should be purposefully designed to create instability or pro-cyclical effects," Mr. Herz said.
The objective is to study the beating response, which is a purposefully designed, unique feature of Korean bells.
