Fidelity Investments Software Engineer interview experience

After a behavioral phone screening, I went into an in-person technical interview where multiple interviewers took turns, sometimes in separate rooms. The first part felt more behavioral, but it quickly shifted into core engineering depth—one question specifically had me walk through solving a coding prompt, then the conversation expanded into system design.

When system design came up, it didn’t stay abstract. I remember being pressed to describe how I’d handle pieces of an end-to-end flow, including topics like inter-service and asynchronous communication patterns, how authentication and