A professional portrait of Jason, a relaxed 25-year-old intellectual with dark gray spiky hair, round glasses, and headphones. He wears a casual black T-shirt and has a relaxed posture. The background is a minimalist office with a glass whiteboard displaying faint mathematical equations and a glowing laptop screen. Soft, cinematic natural light illuminates his face. Clean, sharp editorial style, capturing the dual identity of a full-stack engineer and mathematics teacher.