The Prudhoe-born youngster, who joined the club's Academy as an eight-year-old, suffered a hamstring injury last season which left the versatile defender sidelined for three months.
Despite a lengthy spell on the sidelines, Bloomer made 15 appearances in the U18 Premier League North last season before signing a first pro deal with his boyhood club.
Reflecting on his injury, Bloomer said: "It was a difficult time because it was coming up towards the end of the season, with some big games in that period of time for the under-18s. To see the lads out on the pitch and not play myself was really tough.
"I was able to work hard in the gym when I was injured which was a good thing, focussing on a different aspect of my game and building my strength.
"It's an unbelievable feeling (to sign my first professional contract). It's great to see all the hard work I've put in over the years, especially the last two of my scholarship, has all paid off.
"It's great that my first professional contract is with the team I grew up supporting my whole life."