Learn French: Ce candidat polyvalent est incroyable, on vient de le trouver ! - This versatile candidate is incredible, we just found him!

Because the candidate actually exists and has just been found! You use the subjunctive for an uncertain or sought-after person, like in Je cherche un candidat qui soit polyvalent (I am looking for a candidate who is versatile). Since this sentence states a concrete fact about a specific, real person, the indicative est is required.

What does polyvalent mean in a professional context?

Polyvalent is a very common word in the French working world. It translates to versatile, multi-skilled, or all-around. A candidat polyvalent is someone who can wear many hats and easily adapt to different types of tasks.

Why is the pronoun le placed right before trouver instead of before vient?

In the recent past construction made of venir de plus an infinitive, the direct object pronoun belongs to the action actually being performed. Since the action is finding him, le goes directly in front of the infinitive trouver.

Could we say nous venons de le trouver instead of on vient de le trouver?

Yes, it means exactly the same thing and is grammatically correct. However, in everyday spoken French, on is almost always used instead of nous to mean we, which makes this sentence sound much more natural and conversational.