Fiserv Software Engineer Interview Guide

The final onsite was the most substantial part of my process. I first had a recruiter call, followed by a virtual conversation with an engineering director, before being invited to the King of Prussia office for a roughly two-and-a-half-hour onsite. The onsite was split across several panel-style interviews and felt largely grounded in my actual background rather than puzzle-heavy coding.

A lot of the discussion started from my resume and projects, then moved into backend engineering topics. I was asked about Java and Spring Boot, including Java generics, as well as how I had worked with backend APIs, microservices, and databases. They also covered unit testing, debugging, and Agile/Scrum practices. The system design portion stayed at a basic level but included thinking through microservices, so I would be ready to explain the tradeoffs behind the services and APIs you have built rather than only describing the high-level architecture.

There was also a meaningful behavioral and team-fit component. The interviewers asked about my experience and how I would fit into the team, so having clear examples from prior work was useful. Overall, I found the process fairly resume-driven and focused on practical Java backend knowledge. I did not receive an offer. My main advice is to be prepared to connect OOP concepts, generics, testing, exception handling, and microservice design directly to projects on your resume, because the conversation can move quickly from theory to how you have applied it.