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俺が知ってる中での最強のITエンジニアは…
→ “The strongest IT engineer among the ones I know is...”
俺 ore = I (masculine, casual pronoun)
が ga = (subject marker particle)
知ってる shitteru = knowing / knowing (colloquial contraction of 知っている)
知 shi = know / understand
っ = consonant gemination (marks a double consonant sound)
てる teru = continuous state (colloquial form of ている)
中 chū¹ = among / within / in the middle of
で de = (location/scope marker particle)
の no = 's / of (possessive/genitive particle)
最強 saikyō¹ = strongest / most powerful
最 sa = most / utmost
強 kyō¹ = strength / strong
の no = 's / of (possessive/genitive particle)
IT i-tī¹ = Information Technology (loanword)
エンジニア enjiniā¹ = engineer (loanword from English 'engineer')
は wa = (topic marker particle)
… = (ellipsis indicating suspense or trailing off)