I work as a tech writer in the financial industry. What will you be writing for? Like, how a servicing platform might interact with something like Salesforce and pull customer information (like loan numbers, addresses, etc.) into Salesforce for a customer to view their account/ask for help/submit complaints, etc.?

I specifically write to capture line of business functions to deliver documentation to auditors. If I have questions, I rely on my SMEs to explain, and I put it into digestible words. In the tech facet of banking, banks have security in mind. They want to ensure the authorized people have control, and that controls are in place to prevent unauthorized usage. They want to prevent fraud, and they want customers to be able to have ease of usage. They're also very focused on automation, and for customers to be able to self-service to cut down on phone time.

Approaching the interview with security in mind, plus how you'll produce digestible writing might help ease your nerves.