Sears, 21, scored the second goal in the 2-0 win at Upton Park. The winger was recalled from his loan spell at Scunthorpe just before Christmas to aid Avram Grant's side in their battle against the drop.
"The three points are the most important but personally for me it was a great time to get my second goal in the Premier League," Sears told Sky Sports.
"The boys are really happy at the minute, so a real buzz around the place. I think we worked hard, we pressed them, we tried to play football as well."
Sears famously scored five minutes into his senior debut, with his goal after coming off the bench sealing a 2-1 win over Blackburn Rovers in March 2008.
Since then he has played 33 times for West Ham and had loan spells at Crystal Palace, Coventry and the Iron without getting a second.
Scunthorpe had hoped to bring him back to Glanford Park on loan to add to his nine appearances for the Iron, but that looks unlikely.
Grant has put faith in youth to haul the Hammers away from relegation. He praised Sears as well as fellow academy graduates James Tomkins and Junior Stanislas.
"Freddie has done well on loan even if he hasn't scored, but he scored a fantastic goal," he said.
"The three of them are young players and are doing a good job."