As the lead programmer, he's called the sharpshooter for his ability to pinpoint code issues accurately.

sharpshooter 是由形容词 sharp（敏锐的、精确的）和名词 shooter（射击者）组成的复合词。sharp 在这里表示"精准的"，shooter 指"射击的人"。 sharpshooter 字面意思是"精准的射击手"，引申为"神枪手"，在编程语境中比喻能精准定位问题的专家。