The 20-year-old is the third youngster to sign a four-year deal recently, with Josha Vagnoman and Aaron Opoku also committing their long-term futures to the club in recent months.
David has played just a handful of games for the first team so far, including one in the season just gone, but is likely to play a bigger role in the future under new coach Daniel Thioune.
He spent the second half of the season on loan with Würzburger Kickers, playing five games before the season was interrupted. He was unable to play after the restart due to injury as his temporary club won promotion to the 2. Bundesliga.
“Jonas has developed steadily in recent years. He was a top performer in several of our youth teams and finally successfully mastered the first steps in the professional area of HSV,” explained sporting director Michael Mutzel. “We want to give him the best possible support in the coming years and continuously develop his existing skills.”
“I am pleased that I can continue to be part of the HSV family in the coming years,” said the Hamburg-born David. “I would like to take the next steps here and firmly establish myself in the first team.”
The chances of that are highly likely due to Timo Letschert leaving and Rick van Dronoglen set to miss a big chunk of the season with an cruciate ligament injury. The reliability of Ewerton remains doubtful after an injury-hit season and David Bates, after an unsuccessful loan with Sheffield Wednesday, has no future at the club.
The club are reported to be interested in signing two additional centre-backs, with Moritz Heyer already tipped to follow Thioune from Osnabrück, but David certainly has an early advantage if the club decide against loaning him out again.
Header image source: Hamburger SV.