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시네요

are

→ 이다
시 Honorific + 네 Realization (sentence-final ending) + 요 Polite speech
auxiliary · formal Rare #28,606
are Honorific form, often used to express recognition or surprise.
KO: 정말 전문가시네요.
EN: You're really an expert.
Conjugation of 이다

진짜 프로 시네요

You’re a real pro.

— 토니 에드만 (2016)

"대단해요, 엄청 엘리트 시네요"

That's impressive—you must be really elite.

— 학살기관 (2017)

대단해요, 엄청 엘리트 시네요

That's amazing—you're incredibly elite.

— 학살기관 (2017)