SE has no rules as to how you represent your participation in the network outside the network.
However, you said in a comment:
I may use that profile in professional network sometimes[.]
You should be concerned about how other people are going to perceive the terms you use to describe your participation against what is publicly visible in your profile, and on the SE network. If someone in a professional setting looks at your profile, is your activity on the network going to justify the terms you use? People have different standards as to what constitutes "contributing" to a project or a community. If your activity on the network does not rise up to their standard, they are going to perceive your description as a misrepresentation. Sticking to facts (e.g. "I have posted over 200 answers.") would be safer than using terms like "contributor".
If the facts you can highlight seem underwhelming to you, then this suggests that maybe your activity on the SE network is not noteworthy.