Koen Jansen is a 21-year-old Dutch defender, born on March 11, 2004, who currently plays for Roda JC in the Netherlands and has a market value estimated at €300,000. Jansen is a developing talent in Dutch football, known for his defensive capabilities and potential for growth at the professional level. His career began in the famed Dutch youth academies, which focus on technical development and tactical understanding. Signing for Roda JC represents a significant step, offering him a platform in the Dutch football pyramid to showcase his skills. Key moments so far include his professional debut for the club and performances that demonstrate his composure and tackling ability. While his list of senior honors is still growing, success at youth international level for the Netherlands is a possibility. A notable fact is his nationality, placing him within a rich tradition of Dutch defenders known for their ball-playing skills. In summary, Koen Jansen is a promising young defender whose strengths are his technique and reading of the game, as he builds his career with Roda JC.