They've reported receiving 1million applications per year. If even a fraction of those get interviewed (with 1-5 interviews per candidate) that's a good chunk of data. Correlate that with regular performance reviews of 30k employees... I'd say that's a small Big Data problem.
He's not talking about 30k rows, he's talking about 30k people. It could easily be big data if you monitor & document their every working moment, but they probably aren't doing that so you're probably right.
