Interviewer.ai is an artificial intelligence tool designed to support both companies and job seekers in the interviewing process. Its capabilities encompass two primary areas: interview facilitation and candidate screening for businesses, and interview simulation for job seekers, specifically within the arena of Systems Design. For businesses, the tool enables the screening of candidates at scale for initial interviews, with the ability to adapt its features to reflect specific company requirements or candidate attributes. The tool's AI can also adjust its tone to mirror a company's candidate experience. Furthermore, the AI tool features full voice interaction with a responsive bot that comprehends candidate replies. Businesses benefit from instant transcripts, scorecards detailing individual candidate performance, and direct integration of screening outcomes into their Applicant Tracking Systems (ATS). Aggregated analytics offer visualized, collective insights into candidate question and response trends. For job seekers, Interviewer.ai facilitates simulated software engineering Systems Design interviews, offering instant feedback on user thought processes, diagrams, follow-up queries, and overall solutions. The tool enables interview customization to focus on specific areas of practice, and also provides performance feedback via instant recordings and a detailed scoring rubric for each question component.