Santi Alaysius is an award-winning Interior Designer with over 20 years of experience, renowned for her work on prestigious projects like the Waldorf Astoria Hotel in Chicago, Marriott Yogyakarta, and Indonesia's first design boutique hotel, Kosenda Hotel. Her designs have been featured in Wallpaper UK Magazine, Hospitality Design Magazine, Interior Design Magazine, Elle Décor, and Home & Décor.

In the U.S., Santi has contributed to notable projects such as the USA Pavilion for World Expo 2005 in Japan and Jennifer Lopez's residence in Long Island. She is known for creating exceptional spaces using locally sourced materials, with a commitment to perfection in every detail. Her expertise spans diverse commercial projects, seamlessly blending art, fashion, and industrial elements to bring clients' visions to life.

Santi co-founded Domisilium Studio in 2009 with Hamphrey Tedja. The duo was recognized as Elle Décor Indonesia Magazine's A-list Interior Designers in 2013 and Gen-T by Tatler in 2019. They have achieved international acclaim, collaborating with brands like Nike, Marriott International, and Accor. Since 2013, Santi has also been teaching interior design at LaSalle College Jakarta.

In May 2018, Santi and her partner co-founded DMDIO, specializing in product and exhibition design, supporting both local and international brands. Santi holds degrees from The Art Institute of Seattle and The Illinois Institute of Art in Chicago, graduating with honors in Fashion Marketing & Management (2002) and Interior Architecture (2005). She began her career at Thom Filicia, Inc. in New York and Simeone Deary Design Group in Chicago, focusing on high-end residential, commercial, and hospitality projects.