Initial phone screening with hiring manager.

A few days later, three back-to-back interviews on the same day: two technical and one more on the business end.

The whole process was very quick.

You’ve got a webpage that needs to be updated in real time with aggregated data from a stock exchange. Latency should be as low as is technically possible. Talk me through the technical design, end to end.

How is data from a database structured on a disk?

How do you handle a situation when two processes are trying to write to a file at the same time?

Talk me through your experience in building financial data systems.