Jamin focused on the human figure through careful observation. His sketches and paintings, such as "Waals weesmeisje, zittend naar rechts", demonstrate a preference for candid poses. He often depicted individuals in moments of isolation or domestic duty. The artist used muted tones and precise lines to document the lives of street vendors and orphans. His work avoids sentimentality, choosing instead to present the dignity of his subjects through direct composition.

Modern collectors value Jamin for his honest portrayal of nineteenth-century Dutch society. His prints offer a view into private spaces, from a child at the barber to a mother by a sickbed. These scenes feel authentic because they avoid grand narratives. The small scale and personal nature of his subjects make his work suitable for contemporary interiors. His art provides a sense of history without the artifice of traditional historical painting.