Berka: A Low-Contrast Hybrid Sans Serif From Wahyu & Sani Co. Based in Magelang, Indonesia, Wahyu & Sani Co. is operated by typographers Wahyu Wibowo and Sani Sanjaya. One of their most recent releases through YouWorkForThem is Berka, a low-contrast hybrid sans serif type family that pairs traditional grotesque style with geometric and humanist design. Berka is a minimalist type family that carries a strong contemporary style in spite of its classic design roots. Legibility, simplicity, and functionality are hallmarks of this type design.