Shamraze Khan, 25, of Southey Crescent, and a 17-year-old, who cannot be named for legal reasons, appeared before the Sheffield Magistrates Court and were charged with murdering Thavisha Lakindu Peiris.
Peiris, 25, of Sri Lankan-origin was found dead in his car on Sunday night in the Southey area of Sheffield as he was on his way to make a delivery for Domino's Pizza, the last order before he was to join an IT firm.
Peiris' family described him as the "most caring and loving son a parent could have".
Speaking from their family home in Sri Lanka, his father, Sarath Mahinda Peiris and mother Sudarma Narangoda, said "We sent our son to the UK to study so he can have a better life. Now we are left with only a broken heart."
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"We were devastated and shocked to hear of our son's tragic end and we are still unable to comprehend that he is actually gone," they said.
His colleagues and police said he had been feeling unwell during his last shift and was going to go home early but agreed to deliver one last order.
Domino's Pizza has said it was funding the cost of flying Peiris s family to the UK in the coming days.