About Us
AI builds the interview. People make the hire.
Ratio turns a job description and hiring-manager context into a structured, skills-based interview plan in minutes, then gives human interviewers consistent questions and scoring anchors for comparing candidates. It was built by three co-founders from agency recruiting, product, and engineering, and it started as a spreadsheet. This page is who they are and what they hold to.
The tools fixed everything except the decision
Michael spent 17 years in agency recruiting, at Robert Half, Adecco, and Frank Recruitment Group. In that time the tools got better at everything except the part that mattered: the interview. Sourcing got faster. Scheduling got easier. The decision at the end still came down to who the interviewer liked in the first five minutes.
Ratio started as an idea in Excel. We didn’t set out to build a tech company. We set out to make interviews more useful, and for a long time that lived in a spreadsheet: the skills a role needs, one good question per skill, and a written guide to what a good answer sounds like. AI now does the early build in minutes. The judgment still belongs to the person in the room.
What we hold to
The structure is ours. The decision is yours.
Ratio drafts the skills, the questions, the follow-ups, and the scoring anchors. Your interviewers ask, listen, and score. We never score a candidate for you.
Built on the research.
Structured interviews are the best-supported hiring method in the research, and more than twice as predictive of job performance as unstructured ones (Sackett et al., 2022). Ratio exists to make that method practical enough to use every time.
We say what we can back.
Structure reduces noise and makes decisions easier to explain. It does not eliminate bias, and no method does. When the research doesn’t support something we believe, we’d rather find out.
Built by recruiters and engineers
Michael Day
Co-Founder and CEO
17 years in agency recruiting. Rookie of the year at Robert Half, built a practice at Adecco from 5 to 75 recruiters, led 120 recruiters at Frank Recruitment Group. Designed RATE, Ratio’s scoring framework, from years of watching good candidates lose to good talkers.
Kyle Lee
Co-Founder and Head of Product
Recruiter at Adecco for three years before moving into product. Senior Product Manager at Electric AI, a B2B software company. Has sat on both sides of the hiring table.
Tasha Viarengo
Co-Founder and Head of Technology
Computer Science and Electrical Engineering, UMass Amherst. Built Ratio’s AI pipeline, scoring engine, and production infrastructure.
Assessment science
Yuliya M. Cheban-Gore, PhD
Leads Ratio’s I/O psychology efforts
She is an Assistant Professor of Psychology at Hofstra University with expertise in structured interviewing and personnel selection, and holds a PhD in Industrial-Organizational Psychology from the CUNY Graduate Center. She works with us to review and strengthen how Ratio turns job information into structured interviews, and how we document the method behind the product. She has permission to challenge us.
See the framework she reviews in the RATE framework, or a complete assessment for a senior accountant.
References
- 1.
Sackett, P. R., Zhang, C., Berry, C. M., & Lievens, F. (2022). Revisiting meta-analytic estimates of validity in personnel selection. Journal of Applied Psychology, 107(11), 2040-2068. Ranks structured interviews as the top predictor of job performance, at an estimated validity of .42 against .19 for unstructured interviews.
Bring a role you're hiring for.
We'll build the interview plan in front of you in 30 minutes.