Very unprofessional and got completely ghosted after the interview. During the interview, manager was questioning legitimacy of past work experiences, and asked questions that reflected a culture of uncooperative colleagues which could be a red flag about the company's internal dynamics.
All in all, it is a very typical Singaporean SME - Older owners with quite boomer thinking, lowballed salary, zero WFH days despite horrible location, working hours are 8:30am - 6pm.